Initial commit

.editorconfig

@@ -0,0 +1,43 @@
+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 2
+
+# Ignore diffs/patches
+[*.{diff,patch}]
+end_of_line = unset
+insert_final_newline = unset
+trim_trailing_whitespace = unset
+indent_size = unset
+charset = unset
+indent_style = unset
+indent_size = unset
+
+[{.*,secrets}/**]
+end_of_line = false
+insert_final_newline = false
+trim_trailing_whitespace = unset
+charset = unset
+indent_style = unset
+indent_size = unset
+
+[*.rom]
+end_of_line = unset
+insert_final_newline = unset
+trim_trailing_whitespace = unset
+charset = unset
+indent_style = unset
+indent_size = unset
+
+[*.py]
+indent_size = 4
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

.envrc

@@ -0,0 +1 @@
+use flake

.forgejo/workflows/check.yml

@@ -0,0 +1,22 @@
+name: Flake checks
+on: [pull_request]
+
+jobs:
+  Check:
+    runs-on: self-hosted
+    steps:
+      - name: Check out repository code
+        uses: https://code.forgejo.org/actions/checkout@v4
+
+      - name: Check formatting
+        run: |
+          nix --accept-flake-config --access-tokens '' develop --command treefmt --ci
+
+      - name: Run flake checks
+        run: |
+          set -exuo pipefail
+          # Prevent cache garbage collection by creating GC roots
+          mkdir -p /var/lib/gitea-runner/momo/.local/state/nix/results
+
+          # 1 eval-worker needs about 13GB of memory
+          nix --accept-flake-config --access-tokens '' develop --command nix-fast-build --no-nom --skip-cached --systems "x86_64-linux" --max-jobs 10 --eval-workers 2 --out-link /var/lib/gitea-runner/momo/.local/state/nix/results/nix-fast-build

.forgejo/workflows/update-flake-lock.yml

@@ -0,0 +1,19 @@
+name: Update flake lock
+on: 
+  workflow_dispatch:
+  schedule: 
+    - cron: '22 2 * * 6' # “At 02:22 on Saturday.” 
+
+jobs:
+  update_lockfile:
+    runs-on: self-hosted
+    steps:
+      - name: nix flake update
+        uses: https://git.pub.solar/momo/forgejo-action-update-flake@825bba1d03c853ea9aeded656d230db82f9f1216
+        with:
+          forgejo_access_token: ${{ secrets.MOMO_BOT_ACCESS_TOKEN }}
+          gpg_private_key: ${{ secrets.GPG_SIGN_SUBKEY }}
+          gpg_fingerprint: 881FA070B6FD7B44E194B4244AB6CFF63D7B2B93
+          gpg_passphrase: ${{ secrets.GPG_PASSPHRASE }}
+          git_author: '"momo-bot" <no-reply@momo.koeln>'
+          closure-diff-nixos-configuration: cassiopeia

.gitignore

@@ -0,0 +1,7 @@
+*.tf.json
+/tags.*
+.direnv
+.terraform
+*.plan
+result
+results

LICENSE.md

@@ -0,0 +1,660 @@
+### GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+### Preamble
+
+The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains
+free software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing
+under this license.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+### TERMS AND CONDITIONS
+
+#### 0. Definitions.
+
+"This License" refers to version 3 of the GNU Affero General Public
+License.
+
+"Copyright" also means copyright-like laws that apply to other kinds
+of works, such as semiconductor masks.
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+A "covered work" means either the unmodified Program or a work based
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+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
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+
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+measure under any applicable law fulfilling obligations under article
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+similar laws prohibiting or restricting circumvention of such
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+
+#### 6. Conveying Non-Source Forms.
+
+You may convey a covered work in object code form under the terms of
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+- a) Convey the object code in, or embodied in, a physical product
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+in accord with this section must be in a format that is publicly
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+unpacking, reading or copying.
+
+#### 7. Additional Terms.
+
+"Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
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+
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+of that material) supplement the terms of this License with terms:
+
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+
+All other non-permissive additional terms are considered "further
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+received it, or any part of it, contains a notice stating that it is
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+a further restriction but permits relicensing or conveying under this
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+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions; the
+above requirements apply either way.
+
+#### 8. Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
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+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
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+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
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+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
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+material under section 10.
+
+#### 9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run
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+occurring solely as a consequence of using peer-to-peer transmission
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+
+#### 10. Automatic Licensing of Downstream Recipients.
+
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+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+#### 11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned
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+
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+patent against the party.
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+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
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+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
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+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
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+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+#### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.
+
+#### 13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your
+version supports such interaction) an opportunity to receive the
+Corresponding Source of your version by providing access to the
+Corresponding Source from a network server at no charge, through some
+standard or customary means of facilitating copying of software. This
+Corresponding Source shall include the Corresponding Source for any
+work covered by version 3 of the GNU General Public License that is
+incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+#### 14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions
+of the GNU Affero General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever
+published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+#### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+#### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+#### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+### How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU Affero General Public License as
+        published by the Free Software Foundation, either version 3 of the
+        License, or (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU Affero General Public License for more details.
+
+        You should have received a copy of the GNU Affero General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for
+the specific requirements.
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU AGPL, see <https://www.gnu.org/licenses/>.

README.md

@@ -0,0 +1,3 @@
+# The Momo infrastructure
+
+This repository aims to contain all of the configuration for the whole Momo infrastructure. Our goal is to have everything, from host configurations to Terraform DNS in this repository.

docs/README.md

@@ -0,0 +1,7 @@
+# momo documentation
+
+This directory holds a collection of notes and documentation for momo admins.
+
+### Systems Overview
+
+To get a first overview of existing momo systems, please see the [momo systems overview](./systems-overview.md).

docs/administrative-access.md

@@ -0,0 +1,93 @@
+# Adminstrative access
+
+People with admin access to the infrastructure are added to [`logins/admins.nix`](../logins/admins.nix). This is a attrset with the following structure:
+
+```
+{
+    <username> = {
+        sshPubKeys = {
+            <name> = <pubkey-string>;
+        };
+
+        wireguardDevices = [
+            {
+                publicKey = <pubkey-string>;
+                allowedIPs = [ "10.30.29.<ip-address>/32" "fd00:3029:3029:3029:3029:<ip-address>::/96" ];
+            }
+        ];
+
+        secretEncryptionKeys = {
+            <name> = <encryption-key-string>;
+        };
+    };
+}
+```
+
+# SSH Access
+
+SSH is not reachable from the open internet. Instead, SSH Port 22 is protected by a wireguard VPN network. Thus, to get root access on the servers, at least two pieces of information have to be added to the admins config:
+
+1. **SSH Public key**: self-explanatory. Add your public key to your user attrset under `sshPubKeys`.
+2. **Wireguard device**: each wireguard device has two parts: the public key and the IP addresses it should have in the wireguard network. To add your device, it's best to choose a free number between 200 and 255 and use that in both the ipv4 and ipv6 ranges, for example: `10.30.29.<ip-address>/32` `fd00:3029:3029:3029:3029:<ip-address>::/96`. For more information on how to generate keypairs, see [the NixOS Wireguard docs](https://wiki.nixos.org/wiki/WireGuard#Generate_keypair).
+
+One can access our hosts using this domain scheme:
+
+```
+ssh <username>@<hostname>.wg.momo.koeln
+```
+
+So, for example for `pioneer`:
+
+```
+ssh teutat3s@pioneer.wg.momo.koeln
+```
+
+Example NixOS snippet for WireGuard client config
+
+```
+{
+  networking = {
+    wireguard.enable = true;
+    wg-quick.interfaces = {
+      wg-momo-cloud = {
+        address = [
+          "10.30.29.201/32"
+          "fd00:3029:3029:3029:3029:201::/96"
+        ];
+        privateKeyFile = "/etc/wireguard/momo-cloud.privatekey";
+
+        peers = [
+          {
+            # pioneer.momo.koeln
+            publicKey = "W9Vn2yv+AZjOD7sqKp4DyMbIz5N++Vjlr+6J3BnXj3o=";
+            allowedIPs = [
+              "10.30.30.1/32"
+              "fd00:3030:3030:3030:3030:1::/96"
+            ];
+            #endpoint = "80.244.242.4:51820";
+            endpoint = "[2001:4d88:1ffa:26::4]:51820";
+            persistentKeepalive = 15;
+          }
+          {
+            # cassiopeia.staging.momo.koeln
+            publicKey = "kFlMTGVLVzBq/KS7YRLmIlJgZ2IVR4mhlkEteJMLaTo=";
+            allowedIPs = [
+              "10.30.31.1/32"
+              "fd00:3031:3031:3031:3031:1::/96"
+            ];
+            #endpoint = "80.244.242.6:51820";
+            endpoint = "[2001:4d88:1ffa:26::6]:51820";
+            persistentKeepalive = 15;
+          }
+        ];
+      };
+    };
+  };
+}
+```
+
+# Secret encryption
+
+Deployment secrets are added to the repository in encrypted files. To be able to work with these encrypted files, your public key(s) will have to be added to your user attrset under `secretEncryptionKeys`.
+
+See also the docs on [working with secrets](./secrets.md).

docs/akaunting-setup.md

@@ -0,0 +1,10 @@
+# Akaunting setup
+
+[Upstream docker](https://github.com/akaunting/docker/issues/114#issuecomment-2558426282) uses named volumes. We need bind mount volumes, to allow our nginx to access static files.
+A few manual commands necessary to install akaunting into the bind mount:
+
+```
+curl -Lo /tmp/akaunting.zip 'https://akaunting.com/download.php?version=latest&utm_source=docker&utm_campaign=developers'
+sudo nix run nixpkgs#unzip -- /tmp/akaunting.zip -d /var/lib/akaunting
+rm /tmp/akaunting.zip
+```

docs/backups.md

@@ -0,0 +1,19 @@
+# Backups
+
+We use [Restic](https://restic.readthedocs.io/en/stable/) to create backups and push them to two repositories.
+Check `./modules/backups.nix` and `./hosts/nachtigall/backups.nix` for working examples.
+
+### Hetzner Storagebox
+
+- Uses SFTP for transfer of backups
+
+Adding a new host SSH public key to the storagebox:
+
+First, [SSH to pioneer](./administrative-access.md#ssh-access), then become root and add the new SSH public key
+
+```
+sudo -i
+echo '<ssh-public-key>' | ssh -p23 <user>@<user>.your-storagebox.de install-ssh-key
+```
+
+[Link to Hetzner storagebox docs](https://docs.hetzner.com/robot/storage-box/backup-space-ssh-keys).

docs/deploying.md

@@ -0,0 +1,40 @@
+# Deploying new versions
+
+We use [deploy-rs](https://github.com/serokell/deploy-rs) to deploy changes.
+Currently this process is not automated, so configuration changes will have to
+be manually deployed.
+
+To deploy, make sure you have a [working development shell](./development-shell.md).
+Then, run `deploy-rs` with the hostname of the server you want to deploy:
+
+For pioneer.momo.koeln:
+
+```
+deploy --targets '.#pioneer' --magic-rollback false --auto-rollback false --keep-result --result-path ./results
+```
+
+For cassiopeia.staging.momo.koeln:
+
+```
+deploy --targets '.#cassiopeia' --magic-rollback false --auto-rollback false --keep-result --result-path ./results
+```
+
+Usually we skip all rollback functionality, but if you want to deploy a change
+that might lock you out, e.g. to SSH, it might make sense to set these to `true`.
+
+To skip flake checks, e.g. because you already ran them manually before
+deployment, add the flag `--skip-checks` at the end of the command.
+
+`--dry-activate` can be used to only put all files in place without switching,
+to enable switching to the new config quickly at a later moment.
+
+We use `--keep-result --result-path ./results` to keep the last `result`
+symlink of each `deploy` from being garbage collected. That way, we keep builds
+cached in the Nix store. This is optional and both flags can be removed if disk
+space is a scarce resource on your machine.
+
+You'll need to have SSH Access to the boxes to be able to run `deploy`.
+
+### Getting SSH access
+
+See [administrative-access.md](./administrative-access.md).

docs/dns.md

@@ -0,0 +1,45 @@
+# Changing DNS entries
+
+Our current DNS provider is [hosting.de](https://hosting.de/).
+We use [OpenTofu](https://opentofu.org/) to declaratively manage our momo.koeln DNS records.
+
+### Initial setup
+
+You will need to setup [hosting.de API credentials](https://www.hosting.de/api/#requests-and-authentication),
+look for "hosting.de admin API token" in the momo KeePass database.
+
+```
+export HOSTINGDE_AUTH_TOKEN=<your-API-token>
+```
+
+Now, change into the terraform directory and initialize the opentofu providers.
+
+```
+cd terraform/momo
+
+tofu init
+```
+
+Make your changes, e.g. in `dns.tf`.
+
+```
+$EDITOR dns.tf
+```
+
+Plan your changes using:
+
+```
+tofu plan -out momo-infra.plan
+```
+
+After verification, apply your changes with:
+
+```
+tofu apply "momo-infra.plan"
+```
+
+### Useful links
+
+hosting.de OpenTofu provider docs:
+
+- https://registry.terraform.io/providers/pub-solar/hostingde/latest

docs/invoiceplane.md

@@ -0,0 +1,40 @@
+# Invoiceplane
+
+Initial setup with `services.invoiceplane.sites.<name>.database.createLocally`
+requires manual editing of `ipconfig.php`, to allow creation of the first admin user.
+Access to the database is provided via socket + matching unix username, which
+means there is no password. During the invoiceplane setup in the Web UI,
+filling the invoiceplane database form does not work, because a password will be
+required.
+
+First change these environment variables to `false`, then go to https://invoicing.momo.koeln/setup.
+
+```
+services.invoiceplane.sites."invoicing.${config.momo-cloud.networking.domain}" = {
+  settings = {
+    DISABLE_SETUP=false;
+    SETUP_COMPLETED=false;
+  };
+};
+```
+
+Before continuing the setup wizard in the Web UI, SSH into the server and edit
+`/var/lib/invoiceplane/invoicing.momo.koeln/ipconfig.php`
+
+```
+momo in 🌐 pioneer in ~
+sudo vim /var/lib/invoiceplane/invoicing.momo.koeln/ipconfig.php
+```
+
+Set the following environment variables:
+
+```
+DB_USERNAME='invoiceplane'
+DB_DATABASE='invoiceplane'
+```
+
+This will allow to click through the setup wizard without having to fill in
+anything. After database migrations have run, you will be prompted to create
+the first admin user.
+
+Source: https://wiki.nixos.org/wiki/Invoiceplane

docs/mail.md

@@ -0,0 +1,3 @@
+### Mail
+
+mail.momo.koeln aka pioneer.momo.koeln hosts our mail server.

docs/nextcloud-setup.md

@@ -0,0 +1,23 @@
+# Nextcloud setup
+
+For a basic nextcloud setup, we'll have to generate the following secrets:
+
+- A database password (alphanumeric any size)
+- A cookie secret (alphanumeric any size)
+- A password salt (alphanumeric any size)
+- An oidc secret (alphanumeric any size)
+- An admin password (alphanumeric any size)
+
+## Signaling
+
+- Nextcloud secret: `openssl -rand -hex 16`
+- Signaling block key: `openssl rand -hex 16`
+- Signaling hash key: `openssl rand -hex 16`
+
+## Coturn
+
+- static auth secret: `openssl rand -hex 32`
+
+## Janus
+
+- Janus api key: `openssl rand -base64 16`

docs/nix-flake-updates.md

@@ -0,0 +1,43 @@
+Use these commands to show the diff between versions for planning updates:
+
+```
+OLD_CLOSURE=$(nix build --print-out-paths .#nixosConfigurations.nachtigall.config.system.build.toplevel)
+/nix/store/c6wqp1vzvyr3bq2igd8p460613ddwrmj-nixos-system-nachtigall-23.11.20231201.5de0b32
+```
+
+```
+nix flake update
+...
+```
+
+```
+NEW_CLOSURE=$(nix build --print-out-paths .#nixosConfigurations.nachtigall.config.system.build.toplevel)
+/nix/store/xynyf943d2nw1wgawhzxh13xkkf1whb0-nixos-system-nachtigall-23.11.20231210.781e2a9
+```
+
+```
+nix store diff-closures $OLD_CLOSURE $NEW_CLOSURE
+cpupower: 6.1.64 → 6.1.66
+element-web: 1.11.47 → 1.11.51, +5325.9 KiB
+element-web-wrapped: 1.11.47 → 1.11.51
+initrd-linux: 6.1.64 → 6.1.66
+keycloak: 22.0.5 → 23.0.0, +15201.4 KiB
+linux: 6.1.64, 6.1.64-modules → 6.1.66, 6.1.66-modules, +8.3 KiB
+mastodon: 4.2.1 → 4.2.3, +16.3 KiB
+mastodon-gems: 4.2.1 → 4.2.3, +14.4 KiB
+mastodon-modules: 4.2.1 → 4.2.3
+nix: +18.8 KiB
+nixos-manual: +73.6 KiB
+nixos-system-nachtigall: 23.11.20231201.5de0b32 → 23.11.20231210.781e2a9
+opensearch: 2.11.0 → 2.11.1, +560.5 KiB
+owncast: 0.1.1 → 0.1.2, +798.9 KiB
+ruby3.2.2-bcp47_spec: ∅ → 0.2.1, +13.6 KiB
+ruby3.2.2-json-canonicalization: 0.3.2 → 1.0.0
+ruby3.2.2-json-ld: 3.2.5 → 3.3.1
+ruby3.2.2-rdf: 3.2.11 → 3.3.1
+samba: +12.5 KiB
+source: +3888.1 KiB
+wrapped-ruby-mastodon-gems: 4.2.1 → 4.2.3
+zfs-kernel: 2.2.1-6.1.64 → 2.2.2-6.1.66
+zfs-user: 2.2.1 → 2.2.2
+```

docs/nixos-anywhere.md

@@ -0,0 +1,13 @@
+```
+curl -L https://github.com/nix-community/nixos-images/releases/download/nixos-unstable/nixos-kexec-installer-noninteractive-x86_64-linux.tar.gz | tar -xzf- -C /root
+/root/kexec/run
+```
+
+```
+mkdir -p /etc/secrets/initrd
+ssh-keygen -t ed25519 -f /etc/secrets/initrd/ssh_host_ed25519_key
+```
+
+```
+nix run github:nix-community/nixos-anywhere -- --flake .#blue-shell root@194.13.83.205
+```

docs/paperless-setup.md

@@ -0,0 +1,10 @@
+# Paperless setup
+
+Summary
+
+1. Create a working paperless instance with regular login enabled
+1. Create the initial superuser via CLI
+1. Login as the superuser
+1. Create groups that map groups in `kanidm`:
+   1. `paperless_users` -> with view permissions for users and groups in paperless
+   1. `paperless_admins` -> all permissions

docs/paperless.md

@@ -0,0 +1,18 @@
+# Paperless initial setup
+
+Login will not work until the first superuser account has been created. Use the
+following command **before trying to login with authelia** to create the initial
+superuser account:
+
+```
+sudo /var/lib/paperless/paperless-manage createsuperuser
+```
+
+Without this, a 403 error can be observed in the network tab.
+Other errors in the Web UI that indicate this are:
+`Something went wrong"
+
+In `paperless-web.service` logs
+`Forbidden: /api/ui_settings/`
+
+Source: https://wiki.nixos.org/wiki/Paperless

docs/privacy-hardening.md

@@ -0,0 +1,11 @@
+# Privacy hardening
+
+Some default options in the services we run are not as privacy friendly as they can be. Oftentimes, services assume they are running for an organization in which everyone knows (or wants to know) everyone else. However, when running a public service accounts should be hidden from other users.
+
+## Nextcloud account leaking
+
+By default, accounts are visible globally across the instance. To prevent this, go into the administration settings -> Sharing. Check the option saying "Restrict users to only share with users in their group".
+
+## Forgejo email leaking
+
+By default, emails are visible on the explore page for other logged in users. We have disabled this in the config by setting `service.DEFAULT_KEEP_EMAIL_PRIVATE` to `true`.

docs/rescue.md

@@ -0,0 +1,5 @@
+# Rescue and remote console
+
+Rescue is enabled in the Hetzner interface. Check the shared keepass file for credentials.
+
+The remote console can be requested with Hetzner support. See [the Hetzner docs](https://docs.hetzner.com/robot/dedicated-server/maintainance/kvm-console/) for more information.

docs/reverting-version.md

@@ -0,0 +1 @@
+# Reverting to an old version

docs/secrets.md

@@ -0,0 +1,5 @@
+# Working with secrets
+
+Secrets are handled with [agenix](https://github.com/ryantm/agenix). To be able to view secrets, your public key will have to be added to the admins config. See [Administrative Access](./administrative-access.md) on how to do this.
+
+For a comprehensive tutorial, see [the agenix repository](https://github.com/ryantm/agenix?tab=readme-ov-file#tutorial).

docs/unlocking-luks.md

@@ -0,0 +1,20 @@
+# Unlocking disk with LUKS on boot
+
+After a reboot, the disk encrypted with LUKS will have to be unlocked. This is done by
+accessing the server via SSH as user `root` on port 2222.
+
+pioneer:
+
+```
+ssh -4 root@pioneer.momo.koeln -p 2222
+```
+
+cassiopeia:
+
+```
+ssh -4 root@cassiopeia.staging.momo.koeln -p 2222
+```
+
+After connecting, paste the encryption passphrase you can find in the shared
+keepass. This will disconnect the SSH session immediately and the server will
+continue to boot into stage 2.

docs/unlocking-zfs-pool.md

@@ -0,0 +1,20 @@
+# Unlocking the ZFS pool on boot
+
+After a reboot, the encrypted ZFS pool will have to be unlocked. This is done by
+accessing the server via SSH as user `root` on port 2222.
+
+Nachtigall:
+
+```
+ssh -4 root@nachtigall.pub.solar -p2222
+```
+
+Metronom:
+
+```
+ssh -4 root@metronom.pub.solar -p2222
+```
+
+After connecting, paste the encryption passphrase you can find in the shared
+keepass. This will disconnect the SSH session immediately and the server will
+continue to boot into stage 2.

docs/wireguard.md

@@ -0,0 +1,9 @@
+# WireGuard network subnets
+
+The following network subnets are currently in use for WireGuard:
+
+| Subnet        | Usage              |
+| ------------- | ------------------ |
+| 10.30.29.0/24 | Admin devices      |
+| 10.30.30.0/24 | Production servers |
+| 10.30.31.0/24 | Staging servers    |

flake.lock

@@ -0,0 +1,373 @@
+{
+  "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": "darwin",
+        "home-manager": [
+          "home-manager"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1736955230,
+        "narHash": "sha256-uenf8fv2eG5bKM8C/UvFaiJMZ4IpUFaQxk9OH5t/1gA=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "e600439ec4c273cf11e06fe4d9d906fb98fa097c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
+    "blobs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1604995301,
+        "narHash": "sha256-wcLzgLec6SGJA8fx1OEN1yV/Py5b+U5iyYpksUY/yLw=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "rev": "2cccdf1ca48316f2cfd1c9a0017e8de5a7156265",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "type": "gitlab"
+      }
+    },
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1700795494,
+        "narHash": "sha256-gzGLZSiOhf155FW7262kdHo2YDeugp3VuIFb4/GGng0=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "4b9b83d5a92e8c1fbfd8eb27eda375908c11ec4d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
+    "deploy-rs": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1727447169,
+        "narHash": "sha256-3KyjMPUKHkiWhwR91J1YchF6zb6gvckCAY1jOE+ne0U=",
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "rev": "aa07eb05537d4cd025e2310397a6adcedfe72c76",
+        "type": "github"
+      },
+      "original": {
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "type": "github"
+      }
+    },
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744145203,
+        "narHash": "sha256-I2oILRiJ6G+BOSjY+0dGrTPe080L3pbKpc+gCV3Nmyk=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "76c0a6dba345490508f36c1aa3c7ba5b6b460989",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1743550720,
+        "narHash": "sha256-hIshGgKZCgWh6AYJpJmRgFdR3WUbkY04o82X05xqQiY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "c621e8422220273271f52058f618c94e405bb0f5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744117652,
+        "narHash": "sha256-t7dFCDl4vIOOUMhEZnJF15aAzkpaup9x4ZRGToDFYWI=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "b4e98224ad1336751a2ac7493967a4c9f6d9cb3f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-24.11",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "invoiceplane-template": {
+      "inputs": {
+        "flake-parts": [
+          "flake-parts"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1728398621,
+        "narHash": "sha256-cNCgW0g012t7lZ2gxBpc+Uu6GHV2sTEsOV50nSZ96FM=",
+        "ref": "refs/heads/main",
+        "rev": "a4f2aa76583b5dfa3f2db12ff360ba9f229cfb2f",
+        "revCount": 37,
+        "type": "git",
+        "url": "https://git.pub.solar/momo/invoiceplane-templates.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.pub.solar/momo/invoiceplane-templates.git"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744440957,
+        "narHash": "sha256-FHlSkNqFmPxPJvy+6fNLaNeWnF1lZSgqVCl/eWaJRc4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "26d499fc9f1d567283d5d56fcf367edd815dba1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1743296961,
+        "narHash": "sha256-b1EdN3cULCqtorQ4QeWgLMrd5ZGOjLSLemfa00heasc=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "e4822aea2a6d1cdd36653c134cacfd64c97ff4fa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "nixpkgs-master": {
+      "locked": {
+        "lastModified": 1744734272,
+        "narHash": "sha256-P32AWRtc13VZMfSubFKShFHacXRy6od/ILrwmEgkq9c=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3e5bb71d1ab409b4110a66b8aa340d664892579a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-nc-spreed-signaling-pr": {
+      "locked": {
+        "lastModified": 1742859343,
+        "narHash": "sha256-20TWYfC3kaDgDwHrk/v1EXCNJ3AshgCdTAuxnza48WQ=",
+        "owner": "hensoko",
+        "repo": "nixpkgs",
+        "rev": "86025a170c7d3b8ac7b467b9501598885b8c8728",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hensoko",
+        "ref": "nextcloud-spreed-signaling",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1744463964,
+        "narHash": "sha256-LWqduOgLHCFxiTNYi3Uj5Lgz0SR+Xhw3kr/3Xd0GPTM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2631b0b7abcea6e640ce31cd78ea58910d31e650",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "agenix": "agenix",
+        "deploy-rs": "deploy-rs",
+        "disko": "disko",
+        "flake-parts": "flake-parts",
+        "home-manager": "home-manager",
+        "invoiceplane-template": "invoiceplane-template",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-master": "nixpkgs-master",
+        "nixpkgs-nc-spreed-signaling-pr": "nixpkgs-nc-spreed-signaling-pr",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "simple-nixos-mailserver": "simple-nixos-mailserver"
+      }
+    },
+    "simple-nixos-mailserver": {
+      "inputs": {
+        "blobs": "blobs",
+        "flake-compat": "flake-compat_2",
+        "nixpkgs": [
+          "nixpkgs-unstable"
+        ],
+        "nixpkgs-24_11": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1734884447,
+        "narHash": "sha256-HA9fAmGNGf0cOYrhgoa+B6BxNVqGAYXfLyx8zIS0ZBY=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "nixos-mailserver",
+        "rev": "63209b1def2c9fc891ad271f474a3464a5833294",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "ref": "nixos-24.11",
+        "repo": "nixos-mailserver",
+        "type": "gitlab"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,102 @@
+{
+  inputs = {
+    # Track channels with commits tested and built by hydra
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-master.url = "github:nixos/nixpkgs/master";
+
+    nixpkgs-nc-spreed-signaling-pr.url = "github:hensoko/nixpkgs/nextcloud-spreed-signaling";
+
+    home-manager.url = "github:nix-community/home-manager/release-24.11";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+
+    flake-parts.url = "github:hercules-ci/flake-parts";
+
+    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.11";
+    simple-nixos-mailserver.inputs.nixpkgs-24_11.follows = "nixpkgs";
+    simple-nixos-mailserver.inputs.nixpkgs.follows = "nixpkgs-unstable";
+
+    invoiceplane-template.url = "git+https://git.pub.solar/momo/invoiceplane-templates.git";
+    invoiceplane-template.inputs.nixpkgs.follows = "nixpkgs";
+    invoiceplane-template.inputs.flake-parts.follows = "flake-parts";
+  };
+
+  outputs =
+    inputs@{ self, ... }:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+
+      imports = [
+        inputs.flake-parts.flakeModules.easyOverlay
+        ./lib
+        ./overlays
+        ./modules
+      ];
+
+      perSystem =
+        args@{
+          system,
+          pkgs,
+          config,
+          lib,
+          ...
+        }:
+        {
+          packages = import ./pkgs args;
+          overlayAttrs = config.packages;
+
+          _module.args = {
+            inherit inputs;
+            pkgs = import inputs.nixpkgs {
+              inherit system;
+            };
+            unstable = import inputs.nixpkgs-unstable { inherit system; };
+          };
+
+          checks =
+            let
+              nixos-lib = import (inputs.nixpkgs + "/nixos/lib") { };
+              testDir = builtins.attrNames (builtins.readDir ./tests);
+              testFiles = builtins.filter (n: builtins.match "^.*.nix$" n != null) testDir;
+            in
+            builtins.listToAttrs (
+              map (x: {
+                name = "test-${lib.strings.removeSuffix ".nix" x}";
+                value = nixos-lib.runTest (
+                  import (./tests + "/${x}") {
+                    inherit self;
+                    inherit pkgs;
+                    inherit lib;
+                    inherit config;
+                  }
+                );
+              }) testFiles
+            );
+
+          devShells.default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              nix-fast-build
+              cachix
+              editorconfig-checker
+              nodePackages.prettier
+              nvfetcher
+              shellcheck
+              shfmt
+              treefmt2
+              nixos-generators
+              jq
+              mob
+            ];
+          };
+
+          devShells.ci = pkgs.mkShell { buildInputs = with pkgs; [ nodejs_22 ]; };
+        };
+
+      flake = {
+        formatter."x86_64-linux" = inputs.nixpkgs.legacyPackages."x86_64-linux".nixfmt-rfc-style;
+      };
+    };
+}

lib/compat/default.nix

@@ -0,0 +1,21 @@
+let
+  lock = builtins.fromJSON (
+    builtins.readFile builtins.path {
+      path = ../../flake.lock;
+      name = "lockPath";
+    }
+  );
+  flake =
+    import
+      (fetchTarball {
+        url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+        sha256 = lock.nodes.flake-compat.locked.narHash;
+      })
+      {
+        src = builtins.path {
+          path = ../../.;
+          name = "projectRoot";
+        };
+      };
+in
+flake

lib/compat/nixos/default.nix

@@ -0,0 +1,10 @@
+{ ... }:
+let
+  inherit (default.inputs.nixos) lib;
+
+  host = configs.${hostname} or configs.PubSolarOS;
+  configs = default.nixosConfigurations;
+  default = (import ../.).defaultNix;
+  hostname = lib.fileContents /etc/hostname;
+in
+host

lib/default.nix

@@ -0,0 +1,24 @@
+{
+  self,
+  lib,
+  inputs,
+  ...
+}:
+{
+  # Configuration common to all Linux systems
+  flake = {
+    lib =
+      let
+        callLibs = file: import file { inherit lib; };
+      in
+      rec {
+        ## Define your own library functions here!
+        #id = x: x;
+        ## Or in files, containing functions that take {lib}
+        #foo = callLibs ./foo.nix;
+        ## In configs, they can be used under "lib.our"
+
+        wireguardDevicesForUsers = callLibs ./wireguardDevicesForUsers.nix;
+      };
+  };
+}

lib/wireguardDevicesForUsers.nix

@@ -0,0 +1,6 @@
+{ lib }:
+users:
+lib.lists.foldl (
+  wireguardDevices: userConfig:
+  wireguardDevices ++ (if userConfig ? "wireguardDevices" then userConfig.wireguardDevices else [ ])
+) [ ] (lib.attrsets.attrValues users)

modules/acme/default.nix

@@ -0,0 +1,50 @@
+{
+  flake,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.acme =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Whether to configure ACME default settings for momo-cloud (currently DNS challenge)
+      '';
+
+      staging = mkEnableOption ''
+        Run against letsencrypt staging URL
+      '';
+
+      email = mkOption {
+        description = "Email used for ACME authentication";
+        type = types.str;
+        default = "admins@momo.koeln";
+      };
+
+      credentialsFile = mkOption {
+        description = "File that holds the acme DNS secrets";
+        type = types.nullOr types.path;
+        default = null;
+      };
+    };
+
+  config = lib.mkIf config.momo-cloud.acme.enable {
+    security.acme = {
+      acceptTerms = true;
+
+      defaults = {
+        email = config.momo-cloud.acme.email;
+        server = lib.mkIf config.momo-cloud.acme.staging "https://acme-staging-v02.api.letsencrypt.org/directory";
+        dnsProvider = "hostingde";
+        dnsPropagationCheck = true;
+        credentialsFile = config.momo-cloud.acme.credentialsFile;
+        group = "nginx";
+        webroot = null;
+      };
+    };
+  };
+}

modules/akaunting/default.nix

@@ -0,0 +1,198 @@
+{
+  config,
+  flake,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  backupDir = "/var/backups/akaunting";
+in
+{
+  options.momo-cloud.akaunting = with lib; {
+    enable = mkEnableOption "Enable akaunting instance";
+
+    envFile = mkOption { type = types.str; };
+  };
+
+  config = lib.mkIf config.momo-cloud.akaunting.enable {
+    momo-cloud.docker.enable = true;
+    momo-cloud.postgresql.enable = true;
+    momo-cloud.http-server.enable = true;
+    momo-cloud.acme.enable = true;
+
+    systemd.services."docker-network-akaunting" =
+      let
+        docker = config.virtualisation.oci-containers.backend;
+        dockerBin = "${pkgs.${docker}}/bin/${docker}";
+      in
+      {
+        serviceConfig.Type = "oneshot";
+        before = [ "docker-akaunting.service" ];
+        requiredBy = [ "docker-akaunting.service" ];
+        script = ''
+          ${dockerBin} network inspect akaunting >/dev/null 2>&1 || ${dockerBin} network create akaunting --subnet 172.21.0.0/24
+        '';
+      };
+
+    services.nginx.virtualHosts."akaunting.${config.momo-cloud.networking.domain}" = {
+      enableACME = true;
+      forceSSL = true;
+      root = "/var/lib/akaunting";
+      extraConfig = ''
+        index index.html index.htm index.php;
+        error_page 404 /index.php;
+      '';
+
+      locations."/" = {
+        priority = 100;
+        extraConfig = ''
+          try_files $uri $uri/ /index.php?$query_string;
+        '';
+      };
+
+      # Prevent Direct Access To Protected Files
+      locations."~ \\.(env|log)" = {
+        priority = 200;
+        extraConfig = ''
+          deny all;
+        '';
+      };
+
+      # # Prevent Direct Access To Protected Folders
+      locations."~ ^/(^app$|bootstrap|config|database|overrides|resources|routes|storage|tests|artisan)" =
+        {
+          priority = 300;
+          extraConfig = ''
+            deny all;
+          '';
+        };
+
+      # Prevent Direct Access To modules/vendor Folders Except Assets
+      locations."~ ^/(modules|vendor)\\/(.*)\\.((?!ico|gif|jpg|jpeg|png|js\\b|css|less|sass|font|woff|woff2|eot|ttf|svg).)*$" =
+        {
+          priority = 400;
+          extraConfig = ''
+            deny all;
+          '';
+        };
+
+      # Pass PHP Scripts To FastCGI Server
+      locations."~ \\.php$" = {
+        root = "/var/www/html";
+        priority = 500;
+        extraConfig = ''
+          fastcgi_split_path_info ^(.+\.php)(/.+)$;
+          fastcgi_pass 127.0.0.1:8123;
+          fastcgi_index index.php;
+          fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+          include ${pkgs.nginx}/conf/fastcgi.conf;
+        '';
+      };
+
+      locations."~ /\\.(?!well-known).*" = {
+        priority = 600;
+        extraConfig = ''
+          deny all;
+        '';
+      };
+    };
+
+    virtualisation = {
+      oci-containers = {
+        backend = "docker";
+
+        containers."mysql" = {
+          image = "mariadb:11.7.2";
+          autoStart = true;
+
+          extraOptions = [
+            "--network=akaunting"
+          ];
+
+          environment = {
+            MYSQL_DATABASE = "akaunting";
+          };
+
+          volumes = [
+            "/var/lib/mysql:/var/lib/mysql"
+          ];
+          environmentFiles = [
+            config.momo-cloud.akaunting.envFile
+          ];
+        };
+        containers."akaunting" = {
+          image = "docker.io/akaunting/akaunting:3.1.15-fpm-alpine";
+          autoStart = true;
+
+          ports = [ "127.0.0.1:8123:9000" ];
+
+          extraOptions = [
+            "--pull=always"
+            "--network=akaunting"
+          ];
+
+          environment = {
+            APP_DEBUG = "false";
+
+            APP_URL = "https://akaunting.miom.space";
+            LOCALE = "en-US";
+
+            # Set to true in initial deployment
+            AKAUNTING_SETUP = "false";
+            # Set to false in initial deployment
+            APP_INSTALLED = "true";
+
+            # Don't change this unless you rename your database container or use rootless podman, in case of using rootless podman you should set it to 127.0.0.1 (NOT localhost)
+            DB_HOST = "mysql";
+            DB_PORT = "3306";
+
+            # Change these to match env/db.env
+            DB_NAME = "akaunting";
+
+            # You should change this to a random string of three numbers or letters followed by an underscore
+            DB_PREFIX = "aka_";
+
+            # These define the first company to exist on this instance. They are only used during setup.
+            COMPANY_NAME = "MiOM Kreativraum e.V.";
+            COMPANY_EMAIL = "contact@miom.space";
+          };
+
+          environmentFiles = [
+            config.momo-cloud.akaunting.envFile
+          ];
+
+          volumes = [
+            "/var/lib/akaunting:/var/www/html"
+          ];
+        };
+      };
+    };
+
+    systemd.tmpfiles.rules = [
+      "d '${backupDir}' 0700 root root - -"
+    ];
+
+    momo-cloud.backups.restic.akaunting = {
+      paths = [
+        "/var/lib/akaunting"
+        backupDir
+      ];
+      timerConfig = {
+        OnCalendar = "*-*-* 00:30:00 Etc/UTC";
+      };
+      initialize = true;
+      backupPrepareCommand = ''
+        ${pkgs.docker-client}/bin/docker exec -t mysql sh -c 'mariadb-dump --databases akaunting --password=$MYSQL_PASSWORD --user akaunting' > "${backupDir}/akaunting.sql"
+      '';
+      backupCleanupCommand = ''
+        rm -rf ${backupDir}/*
+      '';
+      pruneOpts = [
+        "--keep-daily 7"
+        "--keep-weekly 4"
+        "--keep-monthly 3"
+      ];
+    };
+  };
+}

modules/autofetch-hostingde-invoices/default.nix

@@ -0,0 +1,54 @@
+{
+  flake,
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+{
+  options.momo-cloud.autofetch-hostingde-invoices = with lib; {
+    enable = mkEnableOption "Enable paperless hostingde invoice autofetching";
+    hostingdeApiKeyFile = mkOption {
+      type = types.str;
+      default = "";
+    };
+    stateDir = mkOption {
+      type = types.str;
+      default = "/var/lib/autofetch-hostingde-invoices/state";
+    };
+    outputDir = mkOption {
+      type = types.str;
+      default = "/var/lib/autofetch-hostingde-invoices/out";
+    };
+    user = mkOption {
+      type = types.str;
+      default = "paperless";
+    };
+    group = mkOption {
+      type = types.str;
+      default = "users";
+    };
+  };
+
+  config =
+    let
+      cfg = config.momo-cloud.autofetch-hostingde-invoices;
+    in
+    lib.mkIf cfg.enable {
+      services.cron = {
+        enable = true;
+        systemCronJobs = [
+          "30 1 * * * ${cfg.user} ${pkgs.autofetch-hostingde-invoices}/bin/autofetch-hostingde-invoices '${cfg.hostingdeApiKeyFile}' '${cfg.outputDir}' ${cfg.stateDir}/ids"
+        ];
+      };
+      systemd.tmpfiles.rules = [
+        "d ${cfg.stateDir} 0700 ${cfg.user} ${cfg.group} - -"
+        "d ${cfg.outputDir} 0700 ${cfg.user}${cfg.group} - -"
+      ];
+
+      momo-cloud.backups.restic.autofetch-hostingde-invoices = {
+        paths = [ cfg.stateDir ];
+        initialize = true;
+      };
+    };
+}

modules/backups/default.nix

@@ -0,0 +1,292 @@
+{
+  flake,
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  utils = import "${flake.inputs.nixpkgs}/nixos/lib/utils.nix" {
+    inherit lib;
+    inherit config;
+    inherit pkgs;
+  };
+  # Type for a valid systemd unit option. Needed for correctly passing "timerConfig" to "systemd.timers"
+  inherit (utils.systemdUtils.unitOptions) unitOption;
+  inherit (lib)
+    literalExpression
+    mkOption
+    mkPackageOption
+    types
+    ;
+in
+{
+  options.momo-cloud.backups = {
+    repos = mkOption {
+      description = ''
+        Configuration of Restic repositories.
+      '';
+      type = types.attrsOf (
+        types.submodule (
+          { name, ... }:
+          {
+            options = {
+              passwordFile = mkOption {
+                type = types.str;
+                description = ''
+                  Read the repository password from a file.
+                '';
+                example = "/etc/nixos/restic-password";
+              };
+
+              environmentFile = mkOption {
+                type = with types; nullOr str;
+                default = null;
+                description = ''
+                  Read repository secrets as environment variables from a file.
+                '';
+                example = "/etc/nixos/restic-env";
+              };
+
+              repository = mkOption {
+                type = with types; nullOr str;
+                default = null;
+                description = ''
+                  repository to backup to.
+                '';
+                example = "sftp:backup@192.168.1.100:/backups/${name}";
+              };
+            };
+          }
+        )
+      );
+
+      default = { };
+      example = {
+        remotebackup = {
+          repository = "sftp:backup@host:/backups/home";
+          passwordFile = "/etc/nixos/secrets/restic-password";
+          environmentFile = "/etc/nixos/secrets/restic-env";
+        };
+      };
+    };
+
+    restic = mkOption {
+      description = ''
+        Periodic backups to create with Restic.
+      '';
+      type = types.attrsOf (
+        types.submodule (
+          { name, ... }:
+          {
+            options = {
+              paths = mkOption {
+                # This is nullable for legacy reasons only. We should consider making it a pure listOf
+                # after some time has passed since this comment was added.
+                type = types.nullOr (types.listOf types.str);
+                default = [ ];
+                description = ''
+                  Which paths to backup, in addition to ones specified via
+                  `dynamicFilesFrom`.  If null or an empty array and
+                  `dynamicFilesFrom` is also null, no backup command will be run.
+                   This can be used to create a prune-only job.
+                '';
+                example = [
+                  "/var/lib/postgresql"
+                  "/home/user/backup"
+                ];
+              };
+
+              exclude = mkOption {
+                type = types.listOf types.str;
+                default = [ ];
+                description = ''
+                  Patterns to exclude when backing up. See
+                  https://restic.readthedocs.io/en/latest/040_backup.html#excluding-files for
+                  details on syntax.
+                '';
+                example = [
+                  "/var/cache"
+                  "/home/*/.cache"
+                  ".git"
+                ];
+              };
+
+              timerConfig = mkOption {
+                type = types.nullOr (types.attrsOf unitOption);
+                default = {
+                  OnCalendar = "daily";
+                  Persistent = true;
+                };
+                description = ''
+                  When to run the backup. See {manpage}`systemd.timer(5)` for
+                  details. If null no timer is created and the backup will only
+                  run when explicitly started.
+                '';
+                example = {
+                  OnCalendar = "00:05";
+                  RandomizedDelaySec = "5h";
+                  Persistent = true;
+                };
+              };
+
+              user = mkOption {
+                type = types.str;
+                default = "root";
+                description = ''
+                  As which user the backup should run.
+                '';
+                example = "postgresql";
+              };
+
+              extraBackupArgs = mkOption {
+                type = types.listOf types.str;
+                default = [ ];
+                description = ''
+                  Extra arguments passed to restic backup.
+                '';
+                example = [ "--exclude-file=/etc/nixos/restic-ignore" ];
+              };
+
+              extraOptions = mkOption {
+                type = types.listOf types.str;
+                default = [ ];
+                description = ''
+                  Extra extended options to be passed to the restic --option flag.
+                '';
+                example = [ "sftp.command='ssh backup@192.168.1.100 -i /home/user/.ssh/id_rsa -s sftp'" ];
+              };
+
+              initialize = mkOption {
+                type = types.bool;
+                default = false;
+                description = ''
+                  Create the repository if it doesn't exist.
+                '';
+              };
+
+              pruneOpts = mkOption {
+                type = types.listOf types.str;
+                default = [ ];
+                description = ''
+                  A list of options (--keep-\* et al.) for 'restic forget
+                  --prune', to automatically prune old snapshots.  The
+                  'forget' command is run *after* the 'backup' command, so
+                  keep that in mind when constructing the --keep-\* options.
+                '';
+                example = [
+                  "--keep-daily 7"
+                  "--keep-weekly 5"
+                  "--keep-monthly 12"
+                  "--keep-yearly 75"
+                ];
+              };
+
+              runCheck = mkOption {
+                type = types.bool;
+                default = (builtins.length config.momo-cloud.backups.restic.${name}.checkOpts > 0);
+                defaultText = literalExpression ''builtins.length config.services.backups.${name}.checkOpts > 0'';
+                description = "Whether to run the `check` command with the provided `checkOpts` options.";
+                example = true;
+              };
+
+              checkOpts = mkOption {
+                type = types.listOf types.str;
+                default = [ ];
+                description = ''
+                  A list of options for 'restic check'.
+                '';
+                example = [ "--with-cache" ];
+              };
+
+              dynamicFilesFrom = mkOption {
+                type = with types; nullOr str;
+                default = null;
+                description = ''
+                  A script that produces a list of files to back up.  The
+                  results of this command are given to the '--files-from'
+                  option. The result is merged with paths specified via `paths`.
+                '';
+                example = "find /home/matt/git -type d -name .git";
+              };
+
+              backupPrepareCommand = mkOption {
+                type = with types; nullOr str;
+                default = null;
+                description = ''
+                  A script that must run before starting the backup process.
+                '';
+              };
+
+              backupCleanupCommand = mkOption {
+                type = with types; nullOr str;
+                default = null;
+                description = ''
+                  A script that must run after finishing the backup process.
+                '';
+              };
+
+              package = mkPackageOption pkgs "restic" { };
+
+              createWrapper = lib.mkOption {
+                type = lib.types.bool;
+                default = true;
+                description = ''
+                  Whether to generate and add a script to the system path, that has the same environment variables set
+                  as the systemd service. This can be used to e.g. mount snapshots or perform other opterations, without
+                  having to manually specify most options.
+                '';
+              };
+            };
+          }
+        )
+      );
+      default = { };
+      example = {
+        localbackup = {
+          paths = [ "/home" ];
+          exclude = [ "/home/*/.cache" ];
+          initialize = true;
+        };
+        remotebackup = {
+          paths = [ "/home" ];
+          extraOptions = [
+            "sftp.command='ssh backup@host -i /etc/nixos/secrets/backup-private-key -s sftp'"
+          ];
+          timerConfig = {
+            OnCalendar = "00:05";
+            RandomizedDelaySec = "5h";
+          };
+        };
+      };
+    };
+  };
+
+  config = {
+    services.restic.backups =
+      let
+        repos = config.momo-cloud.backups.repos;
+        restic = config.momo-cloud.backups.restic;
+
+        repoNames = builtins.attrNames repos;
+        backupNames = builtins.attrNames restic;
+
+        createBackups =
+          backupName:
+          map (repoName: {
+            name = "${backupName}-${repoName}";
+            value = repos."${repoName}" // restic."${backupName}";
+          }) repoNames;
+
+      in
+      builtins.listToAttrs (lib.lists.flatten (map createBackups backupNames));
+
+    # Used for momo-cloud.backups.repos.storagebox
+    programs.ssh.knownHosts = {
+      "u377325.your-storagebox.de".publicKey =
+        "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5EB5p/5Hp3hGW1oHok+PIOH9Pbn7cnUiGmUEBrCVjnAw+HrKyN8bYVV0dIGllswYXwkG/+bgiBlE6IVIBAq+JwVWu1Sss3KarHY3OvFJUXZoZyRRg/Gc/+LRCE7lyKpwWQ70dbelGRyyJFH36eNv6ySXoUYtGkwlU5IVaHPApOxe4LHPZa/qhSRbPo2hwoh0orCtgejRebNtW5nlx00DNFgsvn8Svz2cIYLxsPVzKgUxs8Zxsxgn+Q/UvR7uq4AbAhyBMLxv7DjJ1pc7PJocuTno2Rw9uMZi1gkjbnmiOh6TTXIEWbnroyIhwc8555uto9melEUmWNQ+C+PwAK+MPw==";
+      "[u377325.your-storagebox.de]:23".publicKey =
+        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIICf9svRenC/PLKIL9nk6K/pxQgoiFC41wTNvoIncOxs";
+    };
+  };
+}

modules/core/default.nix

@@ -0,0 +1,60 @@
+{
+  pkgs,
+  config,
+  flake,
+  lib,
+  ...
+}:
+{
+  imports = [
+    ./nix.nix
+    ./networking.nix
+    ./terminal-tooling.nix
+    ./users.nix
+    ./email-smtp.nix
+    ./systemd.nix
+  ];
+
+  options.momo-cloud =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      adminEmail = mkOption {
+        description = "Email address to use for administrative stuff like ACME";
+        type = types.str;
+        default = "admins@momo.koeln";
+      };
+
+      privacyPolicyUrl = mkOption {
+        description = "URL of the privacy policy. Used to link there from applications";
+        type = types.str;
+        default = "https://momo.koeln/privacy";
+      };
+
+      imprintUrl = mkOption {
+        description = "URL of the imprint. Used to link there from applications";
+        type = types.str;
+        default = "https://momo.koeln/about";
+      };
+    };
+
+  config = {
+    environment = {
+      # Just a couple of global packages to make our lives easier
+      systemPackages = with pkgs; [
+        git
+        vim
+        wget
+      ];
+    };
+
+    # Select internationalization properties
+    console = {
+      font = "Lat2-Terminus16";
+      keyMap = "us";
+    };
+
+    time.timeZone = "Etc/UTC";
+  };
+}

modules/core/email-smtp.nix

@@ -0,0 +1,47 @@
+{
+  pkgs,
+  config,
+  flake,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.email-smtp =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      username = mkOption {
+        description = "SMTP auth username";
+        type = types.str;
+        default = "admins@momo.koeln";
+      };
+
+      passwordFile = mkOption {
+        description = "SMTP auth password file";
+        type = types.path;
+      };
+
+      host = mkOption {
+        description = "SMTP host";
+        type = types.str;
+        default = "mail.momo.koeln";
+      };
+
+      port = mkOption {
+        description = "SMTP port";
+        type = types.str;
+        default = "465";
+      };
+
+      encryption = mkOption {
+        description = "SMTP encryption type";
+        type = types.enum [
+          "ssl"
+          "starttls"
+          "none"
+        ];
+        default = "ssl";
+      };
+    };
+}

modules/core/networking.nix

@@ -0,0 +1,68 @@
+{
+  lib,
+  config,
+  ...
+}:
+{
+  options.momo-cloud.networking =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      domain = mkOption {
+        description = "domain on which all services should run.";
+        type = types.str;
+        default = "momo.koeln";
+      };
+
+      defaultInterface = mkOption {
+        description = "Network interface which should be used as the default internet-connected one";
+        type = types.nullOr types.str;
+      };
+    };
+
+  config = {
+
+    # Don't expose SSH via public interfaces
+    networking.firewall.interfaces.wg-ssh.allowedTCPPorts = [ 22 ];
+
+    networking.domain = config.momo-cloud.networking.domain;
+
+    services.openssh = {
+      enable = true;
+      openFirewall = lib.mkDefault false;
+      settings = {
+        PermitRootLogin = "prohibit-password";
+        PasswordAuthentication = false;
+        # Add back openssh MACs that got removed from defaults
+        # for backwards compatibility
+        #
+        # NixOS default openssh MACs have changed to use "encrypt-then-mac" only.
+        # This breaks compatibilty with clients that do not offer these MACs. For
+        # compatibility reasons, we add back the old defaults.
+        # See: https://github.com/NixOS/nixpkgs/pull/231165
+        #
+        # https://blog.stribik.technology/2015/01/04/secure-secure-shell.html
+        # https://infosec.mozilla.org/guidelines/openssh#modern-openssh-67
+        Macs = [
+          "hmac-sha2-512-etm@openssh.com"
+          "hmac-sha2-256-etm@openssh.com"
+          "umac-128-etm@openssh.com"
+          "hmac-sha2-512"
+          "hmac-sha2-256"
+          "umac-128@openssh.com"
+        ];
+      };
+    };
+
+    services.resolved = {
+      enable = true;
+      extraConfig = ''
+        DNS=193.110.81.0#dns0.eu 185.253.5.0#dns0.eu 2a0f:fc80::#dns0.eu 2a0f:fc81::#dns0.eu 9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
+        FallbackDNS=5.1.66.255#dot.ffmuc.net 185.150.99.255#dot.ffmuc.net 2001:678:e68:f000::#dot.ffmuc.net 2001:678:ed0:f000::#dot.ffmuc.net
+        Domains=~.
+        DNSOverTLS=yes
+      '';
+    };
+  };
+}

modules/core/nix.nix

@@ -0,0 +1,64 @@
+{
+  config,
+  pkgs,
+  lib,
+  flake,
+  ...
+}:
+{
+  nixpkgs.config = lib.mkDefault { allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ ]; };
+
+  system.activationScripts.diff-closures = {
+    text = ''
+      if [[ -e /run/current-system ]]; then
+        ${config.nix.package}/bin/nix store diff-closures \
+          /run/current-system "$systemConfig" \
+          --extra-experimental-features nix-command
+      fi
+    '';
+    supportsDryActivation = true;
+  };
+
+  nix = {
+    # Use default version alias for nix package
+    package = pkgs.nix;
+    gc.automatic = true;
+    optimise.automatic = true;
+
+    registry = {
+      nixpkgs.flake = config.momo-cloud.flake-dependency-inject.nixpkgs;
+      unstable.flake = config.momo-cloud.flake-dependency-inject.nixpkgs-unstable;
+      master.flake = config.momo-cloud.flake-dependency-inject.nixpkgs-master;
+      system.flake = flake.self;
+    };
+
+    settings = {
+      # Improve nix store disk usage
+      auto-optimise-store = true;
+      # Prevents impurities in builds
+      sandbox = true;
+      # Give root and @wheel special privileges with nix
+      trusted-users = [
+        "root"
+        "@wheel"
+      ];
+      # Allow only group wheel to connect to the nix daemon
+      allowed-users = [ "@wheel" ];
+    };
+
+    # Generally useful nix option defaults
+    extraOptions = lib.mkForce ''
+      experimental-features = flakes nix-command
+      min-free = 536870912
+      keep-outputs = true
+      keep-derivations = true
+      fallback = true
+    '';
+
+    nixPath = [
+      "nixpkgs=${config.momo-cloud.flake-dependency-inject.nixpkgs}"
+      "nixos-config=${../../lib/compat/nixos}"
+      "home-manager=${config.momo-cloud.flake-dependency-inject.home-manager}"
+    ];
+  };
+}

modules/core/systemd.nix

@@ -0,0 +1,8 @@
+{ ... }:
+
+{
+  # drop logs older than given time
+  services.journald.extraConfig = ''
+    MaxRetentionSec=14day
+  '';
+}

modules/core/terminal-tooling.nix

@@ -0,0 +1,38 @@
+{
+  flake,
+  lib,
+  config,
+  ...
+}:
+{
+  home-manager.users = (
+    lib.attrsets.foldlAttrs (
+      acc: name: value:
+      acc
+      // {
+        ${name} = {
+          programs.git.enable = true;
+          programs.starship.enable = true;
+          programs.bash = {
+            enable = true;
+            historyControl = [
+              "ignoredups"
+              "ignorespace"
+            ];
+          };
+          programs.neovim = {
+            enable = true;
+            vimAlias = true;
+            viAlias = true;
+            defaultEditor = true;
+            # configure = {
+            #   packages.myVimPackages = with pkgs.vimPlugins; {
+            #     start = [vim-nix vim-surrund rainbow];
+            #   };
+            # };
+          };
+        };
+      }
+    ) { } config.momo-cloud.authentication.users
+  );
+}

modules/core/users.nix

@@ -0,0 +1,116 @@
+{
+  flake,
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+{
+  options.momo-cloud.authentication =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      users = mkOption {
+        description = "Administrative users to add";
+
+        type = types.attrsOf (
+          types.submodule {
+            options = {
+              sshPubKeys = mkOption {
+                type = types.attrsOf types.str;
+                default = { };
+              };
+              secretEncryptionKeys = mkOption {
+                type = types.attrsOf types.str;
+                default = { };
+              };
+              wireguardDevices = mkOption {
+                type = types.listOf (
+                  types.submodule {
+                    options = {
+                      publicKey = mkOption { type = types.str; };
+                      allowedIPs = mkOption { type = types.listOf types.str; };
+                    };
+                  }
+                );
+                default = { };
+              };
+            };
+          }
+        );
+
+        default = flake.self.logins.admins;
+      };
+
+      root.initialHashedPassword = mkOption {
+        description = "Hashed password of the root account";
+        type = types.str;
+        default = "$y$j9T$bIN6GjQkmPMllOcQsq52K0$q0Z5B5.KW/uxXK9fItB8H6HO79RYAcI/ZZdB0Djke32";
+      };
+
+      robot.username = mkOption {
+        description = "username for the robot user";
+        type = types.str;
+        default = "hakkonaut";
+      };
+
+      robot.sshPubKeys = mkOption {
+        description = "SSH Keys to use for the robot user";
+        type = types.listOf types.str;
+        default = flake.self.logins.robots.sshPubKeys;
+      };
+    };
+
+  config = {
+    users.users =
+      (lib.attrsets.foldlAttrs (
+        acc: name: value:
+        acc
+        // {
+          ${name} = {
+            name = name;
+            group = name;
+            extraGroups = [
+              "wheel"
+              "docker"
+            ];
+            isNormalUser = true;
+            openssh.authorizedKeys.keys = lib.attrsets.attrValues value.sshPubKeys;
+          };
+        }
+      ) { } config.momo-cloud.authentication.users)
+      // {
+        root.initialHashedPassword = config.momo-cloud.authentication.root.initialHashedPassword;
+
+        ${config.momo-cloud.authentication.robot.username} = {
+          description = "CI and automation user";
+          home = "/home/${config.momo-cloud.authentication.robot.username}";
+          createHome = true;
+          useDefaultShell = true;
+          uid = 998;
+          group = "${config.momo-cloud.authentication.robot.username}";
+          isSystemUser = true;
+          openssh.authorizedKeys.keys = config.momo-cloud.authentication.robot.sshPubKeys;
+        };
+      };
+
+    home-manager.users = (
+      lib.attrsets.foldlAttrs (
+        acc: name: value:
+        acc // { ${name}.home.stateVersion = "24.11"; }
+      ) { } config.momo-cloud.authentication.users
+    );
+
+    users.groups =
+      (lib.attrsets.foldlAttrs (
+        acc: name: value:
+        acc // { "${name}" = { }; }
+      ) { } config.momo-cloud.authentication.users)
+      // {
+        ${config.momo-cloud.authentication.robot.username} = { };
+      };
+
+    security.sudo.wheelNeedsPassword = false;
+  };
+}

modules/coturn/default.nix

@@ -0,0 +1,139 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.momo-cloud.coturn;
+  domain = "turn.${config.momo-cloud.networking.domain}";
+  listeningPort = 3478;
+  tlsListeningPort = 5349;
+  altListeningPort = 3479;
+  altTlsListeningPort = 5350;
+in
+{
+  options.momo-cloud.coturn = with lib; {
+    enable = mkEnableOption "enable coturn";
+    staticAuthSecretFile = mkOption {
+      description = "File that holds the static auth secret";
+      type = types.str;
+    };
+    interface = mkOption {
+      description = "Interface coturn should listen on";
+      type = types.str;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.coturn = {
+      enable = true;
+      no-cli = true;
+      min-port = 49000;
+      max-port = 50000;
+      listening-port = listeningPort;
+      tls-listening-port = tlsListeningPort;
+      alt-listening-port = altListeningPort;
+      alt-tls-listening-port = altTlsListeningPort;
+      use-auth-secret = true;
+      static-auth-secret-file = config.momo-cloud.coturn.staticAuthSecretFile;
+      realm = domain;
+      cert = "${config.security.acme.certs.${domain}.directory}/full.pem";
+      pkey = "${config.security.acme.certs.${domain}.directory}/key.pem";
+      relay-ips =
+        let
+          toIPs = setList: map (set: set.address) setList;
+        in
+        (toIPs config.networking.interfaces.${config.momo-cloud.coturn.interface}.ipv4.addresses)
+        ++ toIPs (config.networking.interfaces.${config.momo-cloud.coturn.interface}.ipv6.addresses);
+      no-tcp-relay = true;
+      extraConfig =
+        let
+          externalIPv4s = lib.strings.concatMapStringsSep "\n" (
+            { address, ... }: "external-ip=${address}"
+          ) config.networking.interfaces.${config.momo-cloud.coturn.interface}.ipv4.addresses;
+          externalIPv6s = lib.strings.concatMapStringsSep "\n" (
+            { address, ... }: "external-ip=${address}"
+          ) config.networking.interfaces.${config.momo-cloud.coturn.interface}.ipv6.addresses;
+        in
+        ''
+          ${externalIPv4s}
+          ${externalIPv6s}
+
+          cipher-list=\"HIGH\"
+
+          no-tlsv1
+          no-tlsv1_1
+
+          no-rfc5780
+          response-origin-only-with-rfc5780
+
+          prod
+
+          no-stun-backward-compatibility
+
+          # ban private IP ranges
+          no-multicast-peers
+          denied-peer-ip=0.0.0.0-0.255.255.255
+          denied-peer-ip=10.0.0.0-10.255.255.255
+          denied-peer-ip=100.64.0.0-100.127.255.255
+          denied-peer-ip=127.0.0.0-127.255.255.255
+          denied-peer-ip=169.254.0.0-169.254.255.255
+          denied-peer-ip=172.16.0.0-172.31.255.255
+          denied-peer-ip=192.0.0.0-192.0.0.255
+          denied-peer-ip=192.0.2.0-192.0.2.255
+          denied-peer-ip=192.88.99.0-192.88.99.255
+          denied-peer-ip=192.168.0.0-192.168.255.255
+          denied-peer-ip=198.18.0.0-198.19.255.255
+          denied-peer-ip=198.51.100.0-198.51.100.255
+          denied-peer-ip=203.0.113.0-203.0.113.255
+          denied-peer-ip=240.0.0.0-255.255.255.255
+          denied-peer-ip=::1
+          denied-peer-ip=64:ff9b::-64:ff9b::ffff:ffff
+          denied-peer-ip=::ffff:0.0.0.0-::ffff:255.255.255.255
+          denied-peer-ip=100::-100::ffff:ffff:ffff:ffff
+          denied-peer-ip=2001::-2001:1ff:ffff:ffff:ffff:ffff:ffff:ffff
+          denied-peer-ip=2002::-2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff
+          denied-peer-ip=fc00::-fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
+          denied-peer-ip=fe80::-febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
+        '';
+    };
+
+    networking.firewall = {
+      allowedUDPPortRanges = with config.services.coturn; [
+        {
+          from = min-port;
+          to = max-port;
+        }
+      ];
+      allowedUDPPorts = [
+        listeningPort
+        altListeningPort
+      ];
+      allowedTCPPortRanges = [ ];
+      allowedTCPPorts = [
+        listeningPort
+        tlsListeningPort
+        altListeningPort
+        altTlsListeningPort
+      ];
+    };
+
+    # get a certificate
+    services.nginx = {
+      enable = true;
+      virtualHosts = {
+        "${domain}" = {
+          forceSSL = true;
+          enableACME = true;
+        };
+      };
+    };
+    security.acme.certs.${config.services.coturn.realm} = {
+      postRun = "systemctl restart coturn.service";
+      group = "turnserver";
+    };
+
+    users.users.nginx.extraGroups = [ "turnserver" ];
+  };
+}

modules/default.nix

@@ -0,0 +1,55 @@
+{
+  self,
+  inputs,
+  lib,
+  config,
+  ...
+}:
+{
+  flake.nixosModules =
+    let
+      names = builtins.filter (name: name != "default.nix") (builtins.attrNames (builtins.readDir ./.));
+      allModulesList = builtins.map (name: ./. + "/${name}/default.nix") names;
+      allModulesAttrSet = builtins.listToAttrs (
+        map (name: {
+          name = name;
+          value = import "./${name}";
+        }) names
+      );
+    in
+    {
+      momo-cloud.imports = [
+        ({
+          # This makes the inputs from the momo-cloud flake available inside other nixosModules.
+          # If we use `flake.inputs` directly in the reusable nixosModules, that attrset would be overwritten
+          # by the inputs of the flake momo-cloud is being used in, instead of pointing at the inputs
+          # of the momo-cloud flake itself.
+          #
+          # See also: https://jade.fyi/blog/flakes-arent-real#injecting-dependencies
+          options.momo-cloud.flake-dependency-inject = lib.mkOption {
+            default = {
+              nixpkgs = inputs.nixpkgs;
+              nixpkgs-unstable = inputs.nixpkgs-unstable;
+              nixpkgs-master = inputs.nixpkgs-master;
+              home-manager = inputs.home-manager;
+            };
+          };
+        })
+
+        inputs.home-manager.nixosModules.home-manager
+        ({
+          home-manager.useGlobalPkgs = true;
+          home-manager.useUserPackages = true;
+          home-manager.extraSpecialArgs = {
+            flake = {
+              inherit self inputs config;
+            };
+          };
+        })
+
+        self.nixosModules.overlays
+        inputs.simple-nixos-mailserver.nixosModule
+      ] ++ allModulesList;
+    }
+    // allModulesAttrSet;
+}

modules/docker/default.nix

@@ -0,0 +1,24 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+{
+  options.momo-cloud.docker = with lib; {
+    enable = mkEnableOption "Enable docker daemon with default settings";
+  };
+
+  config = lib.mkIf config.momo-cloud.docker.enable {
+    virtualisation.docker.enable = true;
+
+    networking.firewall.trustedInterfaces = [ "docker0" ];
+
+    users.users = (
+      lib.attrsets.foldlAttrs (
+        acc: name: value:
+        acc // { ${name}.extraGroups = [ "wheel" ]; }
+      ) { } config.momo-cloud.authentication.users
+    );
+  };
+}

modules/http-server/default.nix

@@ -0,0 +1,68 @@
+{
+  config,
+  lib,
+  pkgs,
+  self,
+  ...
+}:
+{
+  options.momo-cloud.http-server =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Enable the momo cloud http server, currently nginx, with default config
+      '';
+      workerProcesses = mkOption {
+        description = "Amount of worker processes";
+        type = types.number;
+        default = 4;
+      };
+      workerConnections = mkOption {
+        description = "Amount of worker connections";
+        type = types.number;
+        default = 1024;
+      };
+    };
+
+  config = lib.mkIf config.momo-cloud.http-server.enable {
+    networking.firewall.allowedTCPPorts = [
+      80
+      443
+    ];
+
+    services.nginx = {
+      enable = true;
+      enableReload = true;
+      proxyCachePath.cache = {
+        enable = true;
+      };
+      resolver.addresses = [
+        "193.110.81.0" # dns0.eu
+        "185.253.5.0" # dns0.eu
+        "[2a0f:fc80::]" # dns0.eu
+        "[2a0f:fc81::]" # dns0.eu
+        "9.9.9.9" # dns.quad9.net
+        "149.112.112.112" # dns.quad9.net
+        "[2620:fe::fe]" # dns.quad9.net
+        "[2620:fe::9]" # dns.quad9.net
+      ];
+      recommendedGzipSettings = true;
+      recommendedOptimisation = true;
+      recommendedProxySettings = true;
+      recommendedTlsSettings = true;
+      appendHttpConfig = ''
+        # https://my.f5.com/manage/s/article/K51798430
+        proxy_headers_hash_bucket_size 128;
+      '';
+      appendConfig = ''
+        # Number of CPU cores
+        worker_processes ${toString config.momo-cloud.http-server.workerProcesses};
+      '';
+      eventsConfig = ''
+        worker_connections ${toString config.momo-cloud.http-server.workerConnections};
+      '';
+    };
+  };
+}

modules/invoiceplane/default.nix

@@ -0,0 +1,97 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  backupDir = "/var/backups/invoiceplane";
+in
+{
+  imports = [
+    ./override.nix
+  ];
+
+  options.momo-cloud.invoiceplane = with lib; {
+    enable = mkEnableOption "Enable invoiceplane instance";
+    passwordFile = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+    };
+  };
+
+  config = lib.mkIf config.momo-cloud.invoiceplane.enable {
+    momo-cloud.http-server.enable = true;
+    momo-cloud.acme.enable = true;
+    momo-cloud.postgresql.enable = true;
+
+    security.acme.certs = {
+      "invoicing.${config.momo-cloud.networking.domain}" = { };
+    };
+
+    services.nginx.virtualHosts = {
+      "invoicing.${config.momo-cloud.networking.domain}" = {
+        forceSSL = true;
+        useACMEHost = "invoicing.${config.momo-cloud.networking.domain}";
+        listenAddresses = [
+          config.momo-cloud.wireguard.ipv4.address
+          "[${config.momo-cloud.wireguard.ipv6.address}]"
+        ];
+      };
+    };
+
+    services.invoiceplane.webserver = "nginx";
+    services.invoiceplane.sites."invoicing.${config.momo-cloud.networking.domain}" = {
+      enable = true;
+
+      database = {
+        user = "invoiceplane";
+        name = "invoiceplane";
+        host = "127.0.0.1";
+        port = 3306;
+        createLocally = true;
+        passwordFile = config.momo-cloud.invoiceplane.passwordFile;
+      };
+
+      invoiceTemplates = [ pkgs.invoiceplane-template ];
+
+      settings = {
+        SETUP_COMPLETED = true;
+        DISABLE_SETUP = true;
+        IP_URL = "https://invoicing.${config.momo-cloud.networking.domain}";
+      };
+
+      poolConfig = {
+        "pm" = "dynamic";
+        "pm.max_children" = 32;
+        "pm.max_requests" = 500;
+        "pm.max_spare_servers" = 4;
+        "pm.min_spare_servers" = 2;
+        "pm.start_servers" = 2;
+        "php_admin_value[error_log]" =
+          "/var/lib/invoiceplane/invoicing.${config.momo-cloud.networking.domain}/logs/php-error.log";
+        "php_admin_flag[display_errors]" = "off";
+        "php_admin_flag[log_errors]" = "on";
+        "catch_workers_output" = "yes";
+      };
+    };
+
+    systemd.tmpfiles.rules = [
+      "d '${backupDir}' 0700 root root - -"
+    ];
+
+    momo-cloud.backups.restic.invoiceplane = {
+      paths = [
+        backupDir
+        "/var/lib/invoiceplane/invoicing.${config.momo-cloud.networking.domain}"
+      ];
+      initialize = true;
+      backupPrepareCommand = ''
+        ${pkgs.sudo}/bin/sudo -u invoiceplane ${config.services.mysql.package}/bin/mariadb-dump --databases invoiceplane > "${backupDir}/invoiceplane.sql"
+      '';
+      backupCleanupCommand = ''
+        rm -rf ${backupDir}/*
+      '';
+    };
+  };
+}

modules/invoiceplane/override.nix

@@ -0,0 +1,481 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  inherit (lib)
+    any
+    attrValues
+    boolToString
+    concatMapStringsSep
+    concatStrings
+    concatStringsSep
+    escapeShellArg
+    flatten
+    isBool
+    isInt
+    isList
+    isString
+    literalExpression
+    mapAttrs'
+    mapAttrsToList
+    mkDefault
+    mkEnableOption
+    mkIf
+    mkMerge
+    mkOption
+    nameValuePair
+    optionalString
+    types
+    ;
+
+  cfg = config.services.invoiceplane;
+  eachSite = cfg.sites;
+  user = "invoiceplane";
+  webserver = config.services.${cfg.webserver};
+  #backupDir = "/var/lib/invoiceplane/backup";
+
+  invoiceplane-config =
+    hostName: cfg:
+    pkgs.writeText "ipconfig.php" ''
+      IP_URL=http://${hostName}
+      ENABLE_DEBUG=false
+      DISABLE_SETUP=false
+      REMOVE_INDEXPHP=false
+      DB_HOSTNAME=${cfg.database.host}
+      DB_USERNAME=${cfg.database.user}
+      # NOTE: file_get_contents adds newline at the end of returned string
+      DB_PASSWORD=${
+        optionalString (
+          cfg.database.passwordFile != null
+        ) "trim(file_get_contents('${cfg.database.passwordFile}'), \"\\r\\n\")"
+      }
+      DB_DATABASE=${cfg.database.name}
+      DB_PORT=${toString cfg.database.port}
+      SESS_EXPIRATION=864000
+      ENABLE_INVOICE_DELETION=false
+      DISABLE_READ_ONLY=false
+      ENCRYPTION_KEY=
+      ENCRYPTION_CIPHER=AES-256
+      SETUP_COMPLETED=false
+      REMOVE_INDEXPHP=true
+    '';
+
+  mkPhpValue =
+    v:
+    if isString v then
+      escapeShellArg v
+    # NOTE: If any value contains a , (comma) this will not get escaped
+    else if isList v && any lib.strings.isCoercibleToString v then
+      escapeShellArg (concatMapStringsSep "," toString v)
+    else if isInt v then
+      toString v
+    else if isBool v then
+      boolToString v
+    else
+      abort "The Invoiceplane config value ${lib.generators.toPretty { } v} can not be encoded.";
+
+  extraConfig =
+    hostName: cfg:
+    let
+      settings = mapAttrsToList (k: v: "${k}=${mkPhpValue v}") cfg.settings;
+    in
+    pkgs.writeText "extraConfig.php" (concatStringsSep "\n" settings);
+
+  pkg =
+    hostName: cfg:
+    pkgs.stdenv.mkDerivation rec {
+      pname = "invoiceplane-${hostName}";
+      version = src.version;
+      src = pkgs.invoiceplane;
+
+      postPatch = ''
+        # Patch index.php file to load additional config file
+        substituteInPlace index.php \
+          --replace-fail "require('vendor/autoload.php');" "require('vendor/autoload.php'); \$dotenv = Dotenv\Dotenv::createImmutable(__DIR__, 'extraConfig.php'); \$dotenv->load();";
+      '';
+
+      installPhase = ''
+        mkdir -p $out
+        cp -r * $out/
+
+        # symlink uploads and log directories
+        rm -r $out/uploads $out/application/logs $out/vendor/mpdf/mpdf/tmp
+        ln -sf ${cfg.stateDir}/uploads $out/
+        ln -sf ${cfg.stateDir}/logs $out/application/
+        ln -sf ${cfg.stateDir}/tmp $out/vendor/mpdf/mpdf/
+
+        # symlink the InvoicePlane config
+        ln -s ${cfg.stateDir}/ipconfig.php $out/ipconfig.php
+
+        # symlink the extraConfig file
+        ln -s ${extraConfig hostName cfg} $out/extraConfig.php
+
+        # symlink additional templates
+        ${concatMapStringsSep "\n" (
+          template: "cp -r ${template}/. $out/application/views/invoice_templates/pdf/"
+        ) cfg.invoiceTemplates}
+      '';
+    };
+
+  siteOpts =
+    { name, ... }:
+    {
+      options = {
+
+        enable = mkEnableOption "InvoicePlane web application";
+
+        stateDir = mkOption {
+          type = types.path;
+          default = "/var/lib/invoiceplane/${name}";
+          description = ''
+            This directory is used for uploads of attachments and cache.
+            The directory passed here is automatically created and permissions
+            adjusted as required.
+          '';
+        };
+
+        database = {
+          host = mkOption {
+            type = types.str;
+            default = "localhost";
+            description = "Database host address.";
+          };
+
+          port = mkOption {
+            type = types.port;
+            default = 3306;
+            description = "Database host port.";
+          };
+
+          name = mkOption {
+            type = types.str;
+            default = "invoiceplane";
+            description = "Database name.";
+          };
+
+          user = mkOption {
+            type = types.str;
+            default = "invoiceplane";
+            description = "Database user.";
+          };
+
+          passwordFile = mkOption {
+            type = types.nullOr types.path;
+            default = null;
+            example = "/run/keys/invoiceplane-dbpassword";
+            description = ''
+              A file containing the password corresponding to
+              {option}`database.user`.
+            '';
+          };
+
+          createLocally = mkOption {
+            type = types.bool;
+            default = true;
+            description = "Create the database and database user locally.";
+          };
+        };
+
+        invoiceTemplates = mkOption {
+          type = types.listOf types.path;
+          default = [ ];
+          description = ''
+            List of path(s) to respective template(s) which are copied from the 'invoice_templates/pdf' directory.
+
+            ::: {.note}
+            These templates need to be packaged before use, see example.
+            :::
+          '';
+          example = literalExpression ''
+            let
+              # Let's package an example template
+              template-vtdirektmarketing = pkgs.stdenv.mkDerivation {
+                name = "vtdirektmarketing";
+                # Download the template from a public repository
+                src = pkgs.fetchgit {
+                  url = "https://git.project-insanity.org/onny/invoiceplane-vtdirektmarketing.git";
+                  sha256 = "1hh0q7wzsh8v8x03i82p6qrgbxr4v5fb05xylyrpp975l8axyg2z";
+                };
+                sourceRoot = ".";
+                # Installing simply means copying template php file to the output directory
+                installPhase = ""
+                  mkdir -p $out
+                  cp invoiceplane-vtdirektmarketing/vtdirektmarketing.php $out/
+                "";
+              };
+            # And then pass this package to the template list like this:
+            in [ template-vtdirektmarketing ]
+          '';
+        };
+
+        poolConfig = mkOption {
+          type =
+            with types;
+            attrsOf (oneOf [
+              str
+              int
+              bool
+            ]);
+          default = {
+            "pm" = "dynamic";
+            "pm.max_children" = 32;
+            "pm.start_servers" = 2;
+            "pm.min_spare_servers" = 2;
+            "pm.max_spare_servers" = 4;
+            "pm.max_requests" = 500;
+          };
+          description = ''
+            Options for the InvoicePlane PHP pool. See the documentation on `php-fpm.conf`
+            for details on configuration directives.
+          '';
+        };
+
+        settings = mkOption {
+          type = types.attrsOf types.anything;
+          default = { };
+          description = ''
+            Structural InvoicePlane configuration. Refer to
+            <https://github.com/InvoicePlane/InvoicePlane/blob/master/ipconfig.php.example>
+            for details and supported values.
+          '';
+          example = literalExpression ''
+            {
+              SETUP_COMPLETED = true;
+              DISABLE_SETUP = true;
+              IP_URL = "https://invoice.example.com";
+            }
+          '';
+        };
+
+        cron = {
+          enable = mkOption {
+            type = types.bool;
+            default = false;
+            description = ''
+              Enable cron service which periodically runs Invoiceplane tasks.
+              Requires key taken from the administration page. Refer to
+              <https://wiki.invoiceplane.com/en/1.0/modules/recurring-invoices>
+              on how to configure it.
+            '';
+          };
+          key = mkOption {
+            type = types.str;
+            description = "Cron key taken from the administration page.";
+          };
+        };
+
+      };
+
+    };
+in
+{
+  disabledModules = [ "services/web-apps/invoiceplane.nix" ];
+
+  # interface
+  options = {
+    services.invoiceplane = mkOption {
+      type = types.submodule {
+
+        options.sites = mkOption {
+          type = types.attrsOf (types.submodule siteOpts);
+          default = { };
+          description = "Specification of one or more WordPress sites to serve";
+        };
+
+        options.webserver = mkOption {
+          type = types.enum [
+            "caddy"
+            "nginx"
+          ];
+          default = "caddy";
+          example = "nginx";
+          description = ''
+            Which webserver to use for virtual host management.
+          '';
+        };
+      };
+      default = { };
+      description = "InvoicePlane configuration.";
+    };
+
+  };
+
+  # implementation
+  config = mkIf (eachSite != { }) (mkMerge [
+    {
+
+      assertions = flatten (
+        mapAttrsToList (hostName: cfg: [
+          {
+            assertion = cfg.database.createLocally -> cfg.database.user == user;
+            message = ''services.invoiceplane.sites."${hostName}".database.user must be ${user} if the database is to be automatically provisioned'';
+          }
+          {
+            assertion = cfg.database.createLocally -> cfg.database.passwordFile == null;
+            message = ''services.invoiceplane.sites."${hostName}".database.passwordFile cannot be specified if services.invoiceplane.sites."${hostName}".database.createLocally is set to true.'';
+          }
+          {
+            assertion = cfg.cron.enable -> cfg.cron.key != null;
+            message = ''services.invoiceplane.sites."${hostName}".cron.key must be set in order to use cron service.'';
+          }
+        ]) eachSite
+      );
+
+      services.mysql = mkIf (any (v: v.database.createLocally) (attrValues eachSite)) {
+        enable = true;
+        package = mkDefault pkgs.mariadb;
+        ensureDatabases = mapAttrsToList (hostName: cfg: cfg.database.name) eachSite;
+        ensureUsers = mapAttrsToList (hostName: cfg: {
+          name = cfg.database.user;
+          ensurePermissions = {
+            "${cfg.database.name}.*" = "ALL PRIVILEGES";
+          };
+        }) eachSite;
+      };
+
+      services.phpfpm = {
+        phpPackage = pkgs.php81;
+        pools = mapAttrs' (
+          hostName: cfg:
+          (nameValuePair "invoiceplane-${hostName}" {
+            inherit user;
+            group = webserver.group;
+            settings = {
+              "listen.owner" = webserver.user;
+              "listen.group" = webserver.group;
+            } // cfg.poolConfig;
+          })
+        ) eachSite;
+      };
+
+    }
+
+    {
+
+      systemd.tmpfiles.rules = flatten (
+        mapAttrsToList (hostName: cfg: [
+          "d ${cfg.stateDir} 0750 ${user} ${webserver.group} - -"
+          "f ${cfg.stateDir}/ipconfig.php 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/logs 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/uploads 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/uploads/archive 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/uploads/customer_files 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/uploads/temp 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/uploads/temp/mpdf 0750 ${user} ${webserver.group} - -"
+          "d ${cfg.stateDir}/tmp 0750 ${user} ${webserver.group} - -"
+        ]) eachSite
+      );
+
+      systemd.services.invoiceplane-config = {
+        serviceConfig.Type = "oneshot";
+        script = concatStrings (
+          mapAttrsToList (hostName: cfg: ''
+            mkdir -p ${cfg.stateDir}/logs \
+                     ${cfg.stateDir}/uploads
+            if ! grep -q IP_URL "${cfg.stateDir}/ipconfig.php"; then
+              cp "${invoiceplane-config hostName cfg}" "${cfg.stateDir}/ipconfig.php"
+            fi
+          '') eachSite
+        );
+        wantedBy = [ "multi-user.target" ];
+      };
+
+      users.users.${user} = {
+        group = webserver.group;
+        isSystemUser = true;
+      };
+
+    }
+    {
+
+      # Cron service implementation
+
+      systemd.timers = mapAttrs' (
+        hostName: cfg:
+        (nameValuePair "invoiceplane-cron-${hostName}" (
+          mkIf cfg.cron.enable {
+            wantedBy = [ "timers.target" ];
+            timerConfig = {
+              OnBootSec = "5m";
+              OnUnitActiveSec = "5m";
+              Unit = "invoiceplane-cron-${hostName}.service";
+            };
+          }
+        ))
+      ) eachSite;
+
+      systemd.services = mapAttrs' (
+        hostName: cfg:
+        (nameValuePair "invoiceplane-cron-${hostName}" (
+          mkIf cfg.cron.enable {
+            serviceConfig = {
+              Type = "oneshot";
+              User = user;
+              ExecStart = "${pkgs.curl}/bin/curl --header 'Host: ${hostName}' http://localhost/invoices/cron/recur/${cfg.cron.key}";
+            };
+          }
+        ))
+      ) eachSite;
+
+    }
+
+    (mkIf (cfg.webserver == "caddy") {
+      services.caddy = {
+        enable = true;
+        virtualHosts = mapAttrs' (
+          hostName: cfg:
+          (nameValuePair "http://${hostName}" {
+            extraConfig = ''
+              root * ${pkg hostName cfg}
+              file_server
+              php_fastcgi unix/${config.services.phpfpm.pools."invoiceplane-${hostName}".socket}
+            '';
+          })
+        ) eachSite;
+      };
+    })
+
+    (mkIf (cfg.webserver == "nginx") {
+      services.nginx = {
+        enable = true;
+        virtualHosts = mapAttrs' (
+          hostName: cfg:
+          (nameValuePair hostName {
+            root = pkg hostName cfg;
+            extraConfig = ''
+              index index.php index.html index.htm;
+
+              if (!-e $request_filename){
+                rewrite ^(.*)$ /index.php break;
+              }
+            '';
+
+            locations = {
+              "/setup".extraConfig =
+                let
+                  scheme = if config.services.nginx.virtualHosts.${hostName}.forceSSL then "https" else "http";
+                in
+                ''
+                  rewrite ^(.*)$ ${scheme}://${hostName}/ redirect;
+                '';
+
+              "~ .php$" = {
+                extraConfig = ''
+                  fastcgi_split_path_info ^(.+\.php)(/.+)$;
+                  fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+                  fastcgi_pass unix:${config.services.phpfpm.pools."invoiceplane-${hostName}".socket};
+                  include ${config.services.nginx.package}/conf/fastcgi_params;
+                  include ${config.services.nginx.package}/conf/fastcgi.conf;
+                '';
+              };
+            };
+          })
+        ) eachSite;
+      };
+    })
+  ]);
+}

modules/janus-gw/default.nix

@@ -0,0 +1,130 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.momo-cloud.janus-gw;
+  domain = "janus.${config.momo-cloud.networking.domain}";
+  httpPort = "8088";
+  wsPort = "8188";
+
+  janusCfg = pkgs.writeText "janus.jcfg" ''
+    plugins: {
+      disable = "libjanus_audiobridge.so,libjanus_echotest.so,libjanus_nosip.so,libjanus_recordplay.so,libjanus_sip.so,libjanus_textroom.so,libjanus_videocall.so"
+    }
+    loggers: {
+      disable = "libjanus_jsonlog.so"
+    }
+    nat: {
+      stun_server = "turn.${config.momo-cloud.networking.domain}"
+      stun_port = "${toString config.services.coturn.listening-port}"
+      full_trickle = true
+      turn_rest_api_key = "##JANUSAPIKEY##"
+    }
+  '';
+
+  bootstrapConfig = pkgs.writeShellScript "bootstrap-janus" ''
+    CFG=/etc/janus/janus.jcfg
+
+    cp -f ${janusCfg} ''${CFG}
+    sed -ri "s/##JANUSAPIKEY##/$(cat ${cfg.apiKeyFile})/g" ''${CFG}
+
+    chown janus:janus ''${CFG}
+  '';
+in
+{
+  options.momo-cloud.janus-gw =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption "enable janus-gw";
+      apiKeyFile = mkOption {
+        description = "File that holds the janus server api key";
+        type = types.str;
+      };
+    };
+
+  config = lib.mkIf cfg.enable {
+    services.nginx.virtualHosts."${domain}" = {
+      forceSSL = true;
+      enableACME = true;
+
+      locations = {
+        "/" = {
+          proxyPass = "http://127.0.0.1:${wsPort}/";
+          proxyWebsockets = true;
+        };
+        "/janus" = {
+          proxyPass = "http://127.0.0.1:${httpPort}/janus";
+          proxyWebsockets = true;
+        };
+      };
+    };
+
+    environment.etc = {
+      "janus/janus.plugin.streaming.jcfg".text = ''
+        general: {
+        }
+
+      '';
+      "janus/janus.plugin.videoroom.jcfg".text = ''
+        general: {
+        }
+      '';
+      "janus/janus.transport.http.jcfg".text = ''
+        general: {
+          base_path = "/janus"
+          http = true
+          port = ${httpPort}
+          ip = "127.0.0.1"
+          https = false
+          acl = "127.,"
+          acl_forwarded = true
+        }
+
+        admin: {
+          admin_base_path= "/admin"
+          admin_http = true
+          admin_port = 7088
+          admin_https = false
+          ip = "127.0.0.1"
+        }
+      '';
+
+      "janus/janus.transport.websockets.jcfg".text = ''
+        general: {
+                json = "indented"				# Whether the JSON messages should be indented (default),
+                                                                                # plain (no indentation) or compact (no indentation and no spaces)
+                ws = true						# Whether to enable the WebSockets API
+                ws_port = ${wsPort}					# WebSockets server port
+                ws_ip = "127.0.0.1"			# Whether we should bind this server to a specific IP address only
+                wss = false						# Whether to enable secure WebSockets
+        }
+      '';
+    };
+
+    users.groups."janus" = { };
+    users.users."janus" = {
+      isSystemUser = true;
+      group = "janus";
+    };
+
+    systemd.services.janus = {
+      after = [ "coturn.service" ];
+      serviceConfig = {
+        StateDirectory = "janus";
+        LimitNOFILE = 65536;
+        ExecStartPre = "!${bootstrapConfig}";
+        ExecStart = "${pkgs.janus-gateway}/bin/janus -F /etc/janus";
+        User = "janus";
+        Group = "janus";
+        Restart = "on-failure";
+      };
+      wantedBy = [ "multi-user.target" ];
+    };
+  };
+}

modules/kanidm/default.nix

@@ -0,0 +1,91 @@
+{
+  lib,
+  config,
+  pkgs,
+  flake,
+  ...
+}:
+let
+  domain = "account.${config.momo-cloud.networking.domain}";
+in
+{
+  imports = [
+    ./override.nix
+  ];
+
+  disabledModules = [
+    "services/security/kanidm.nix"
+  ];
+
+  options.momo-cloud.authentication =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Whether to enable the kanidm identity management service
+      '';
+      adminPasswordFile = mkOption {
+        description = "File that holds the initial admin user password";
+        type = types.str;
+      };
+      idmAdminPasswordFile = mkOption {
+        description = "File that holds the initial idm_admin user password";
+        type = types.str;
+      };
+    };
+
+  config = lib.mkIf config.momo-cloud.authentication.enable {
+    momo-cloud.acme.enable = true;
+    momo-cloud.http-server.enable = true;
+
+    security.acme.certs.${domain} = {
+      reloadServices = [
+        "nginx.service"
+        "kanidm.service"
+      ];
+    };
+
+    users.users.kanidm.extraGroups = [ "nginx" ];
+
+    services.nginx.virtualHosts = {
+      ${domain} = {
+        forceSSL = true;
+        useACMEHost = domain;
+        locations."/".proxyPass = "https://${config.services.kanidm.serverSettings.bindaddress}";
+        locations."/".extraConfig = ''
+          proxy_ssl_name ${domain};
+          proxy_ssl_server_name on;
+        '';
+      };
+    };
+
+    services.kanidm = {
+      enableServer = true;
+      package = pkgs.kanidmWithSecretProvisioning_1_5;
+      serverSettings = {
+        origin = "https://${domain}";
+        domain = domain;
+        bindaddress = "127.0.0.1:8443";
+        ldapbindaddress = "127.0.0.1:636";
+        tls_chain = "${config.security.acme.certs.${domain}.directory}/fullchain.pem";
+        tls_key = "${config.security.acme.certs.${domain}.directory}/key.pem";
+        trust_x_forward_for = true;
+      };
+      provision = {
+        enable = true;
+        adminPasswordFile = config.momo-cloud.authentication.adminPasswordFile;
+        idmAdminPasswordFile = config.momo-cloud.authentication.idmAdminPasswordFile;
+      };
+    };
+
+    # kanidm only allows running with HTTPS, and thus depends
+    # on the certificates generated by ACME to be there before start
+    systemd.services.kanidm.after = [ "acme-${domain}.service" ];
+
+    momo-cloud.backups.restic.kanidm = {
+      paths = [ "/var/lib/kanidm" ];
+      initialize = true;
+    };
+  };
+}

modules/mail-server/default.nix

@@ -0,0 +1,45 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.mail-server =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Whether to enable the mail server
+      '';
+    };
+
+  config = lib.mkIf config.momo-cloud.mail-server.enable {
+    momo-cloud.acme.enable = true;
+
+    mailserver = {
+      enable = true;
+      fqdn = "mail.${config.momo-cloud.networking.domain}";
+      domains = [ config.momo-cloud.networking.domain ];
+      # Use Let's Encrypt certificates. Note that this needs to set up a stripped
+      # down nginx and opens port 80.
+      certificateScheme = "acme-nginx";
+    };
+
+    momo-cloud.backups.restic.mail-server = {
+      paths = [
+        "/var/vmail"
+        "/var/dkim"
+      ];
+      timerConfig = {
+        OnCalendar = "*-*-* 02:00:00 Etc/UTC";
+      };
+      initialize = true;
+      pruneOpts = [
+        "--keep-daily 7"
+        "--keep-weekly 4"
+        "--keep-monthly 3"
+      ];
+    };
+  };
+}

modules/monitoring-client/alloy-config.nix

@@ -0,0 +1,32 @@
+{ config }:
+''
+  discovery.relabel "journal" {
+    targets = []
+
+    rule {
+      source_labels = ["__journal__systemd_unit"]
+      target_label  = "unit"
+    }
+  }
+
+  loki.source.journal "journal" {
+    max_age       = "24h0m0s"
+    relabel_rules = discovery.relabel.journal.rules
+    forward_to    = [loki.write.default.receiver]
+    labels        = {
+      host = "${config.networking.hostName}.${config.momo-cloud.networking.domain}",
+      job  = "systemd-journal",
+    }
+  }
+
+  loki.write "default" {
+    endpoint {
+      url = "https://loki.${config.momo-cloud.networking.domain}/loki/api/v1/push"
+    }
+    basic_auth = {
+      username = "loki"
+      password_file = "${config.momo-cloud.monitoring-client.basicAuthPasswordFile}"
+    }
+    external_labels = {}
+  }
+''

modules/monitoring-client/default.nix

@@ -0,0 +1,25 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.momo-cloud.monitoring-client;
+in
+{
+  options.momo-cloud.monitoring-client = {
+    enable = lib.mkEnableOption "enable monitoring client";
+    basicAuthPasswordFile = lib.mkOption {
+      description = "Basic auth password file to connect to loki";
+      type = lib.types.path;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.etc."alloy/config.alloy".text = (import ./alloy-config.nix) { inherit config; };
+    services.alloy = {
+      enable = true;
+    };
+
+    systemd.services.alloy.reloadTriggers = [
+      cfg.basicAuthPasswordFile
+    ];
+  };
+}

modules/monitoring-server/default.nix

@@ -0,0 +1,14 @@
+{ lib, ... }:
+
+{
+  imports = [
+    ./grafana.nix
+    ./grafana-dashboards.nix
+    ./loki.nix
+    ./prometheus.nix
+  ];
+
+  options.momo-cloud.monitoring-server = {
+    enable = lib.mkEnableOption "Enable monitoring server";
+  };
+}

modules/monitoring-server/grafana-dashboards.nix

@@ -0,0 +1,16 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.momo-cloud.monitoring-server;
+in
+{
+  config = lib.mkIf cfg.enable {
+    environment.etc = {
+      "grafana-dashboards/node-exporter-full_rev33.json" = {
+        source = ./grafana-dashboards/node-exporter-full_rev33.json;
+        group = "grafana";
+        user = "grafana";
+      };
+    };
+  };
+}

modules/monitoring-server/grafana.nix

@@ -0,0 +1,148 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.momo-cloud.monitoring-server;
+in
+{
+  options.momo-cloud.monitoring-server.grafana =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      adminPasswordFile = mkOption { type = types.str; };
+      oidcSecretFile = mkOption { type = types.str; };
+      smtpHost = mkOption {
+        type = types.str;
+        default = "${config.momo-cloud.email-smtp.host}:${config.momo-cloud.email-smtp.port}";
+      };
+      smtpUser = mkOption {
+        type = types.str;
+        default = config.momo-cloud.email-smtp.username;
+      };
+      smtpPasswordFile = mkOption {
+        type = types.str;
+        default = config.momo-cloud.email-smtp.passwordFile;
+      };
+    };
+
+  config = lib.mkIf cfg.enable {
+    momo-cloud.acme.enable = true;
+    momo-cloud.proxy.enable = true;
+
+    services.nginx.virtualHosts."grafana.${config.momo-cloud.networking.domain}" = {
+      enableACME = true;
+      forceSSL = true;
+      locations."/".proxyPass =
+        "http://127.0.0.1:${toString config.services.grafana.settings.server.http_port}";
+    };
+
+    services.grafana = {
+      enable = true;
+      settings = {
+        server = {
+          http_addr = "127.0.0.1";
+          http_port = 3000;
+          # Grafana needs to know on which domain and URL it's running
+          domain = "grafana.${config.momo-cloud.networking.domain}";
+          root_url = "https://grafana.${config.momo-cloud.networking.domain}";
+          enable_gzip = true;
+        };
+        smtp = {
+          enabled = true;
+          host = cfg.grafana.smtpHost;
+          user = cfg.grafana.smtpUser;
+          password = "\$__file{${cfg.grafana.smtpPasswordFile}}";
+          from_address = "grafana@${config.momo-cloud.networking.domain}";
+          from_name = "grafana.${config.momo-cloud.networking.domain}";
+          ehlo_identity = "grafana.${config.momo-cloud.networking.domain}";
+        };
+        security = {
+          admin_email = config.momo-cloud.adminEmail;
+          admin_password = "\$__file{${cfg.grafana.adminPasswordFile}}";
+        };
+        "auth.generic_oauth" = {
+          enabled = true;
+          name = "momo-cloud ID";
+          allow_sign_up = true;
+          client_id = "grafana";
+          client_secret = "\$__file{${cfg.grafana.oidcSecretFile}}";
+          scopes = "openid email profile offline_access roles groups";
+          email_attribute_path = "email";
+          login_attribute_path = "preferred_username";
+          name_attribute_path = "full_name";
+          auth_url = "https://account.${config.momo-cloud.networking.domain}/ui/oauth2";
+          token_url = "https://account.${config.momo-cloud.networking.domain}/oauth2/token";
+          api_url = "https://account.${config.momo-cloud.networking.domain}/oauth2/openid/grafana/userinfo";
+          groups_attribute_path = "groups";
+          role_attribute_path = "contains(grafana_role[*], 'GrafanaAdmin') && 'GrafanaAdmin' || contains(grafana_role[*], 'Viewer') && 'Viewer'";
+          use_refresh_token = true;
+          use_pkce = true;
+          allow_assign_grafana_admin = true;
+        };
+      };
+      provision = {
+        enable = true;
+        datasources = {
+          settings = {
+            datasources = [
+              {
+                name = "Prometheus";
+                type = "prometheus";
+                access = "proxy";
+                url = "http://127.0.0.1:${toString config.services.prometheus.port}";
+                isDefault = true;
+              }
+              {
+                name = "Loki";
+                type = "loki";
+                access = "proxy";
+                url = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}";
+              }
+            ];
+          };
+        };
+        dashboards = {
+          settings = {
+            providers = [
+              {
+                name = "momo Dashboards";
+                options.path = "/etc/grafana-dashboards";
+              }
+            ];
+          };
+        };
+      };
+    };
+
+    services.kanidm.provision = {
+      groups.grafana_users = {
+        memberless = true;
+      };
+      groups.grafana_admins = {
+        memberless = true;
+      };
+
+      systems.oauth2."grafana" = {
+        displayName = "grafana";
+        originUrl = "https://grafana.${config.momo-cloud.networking.domain}/login/generic_oauth";
+        basicSecretFile = cfg.grafana.oidcSecretFile;
+        preferShortUsername = true;
+        claimMaps.grafana_role = {
+          valuesByGroup = {
+            grafana_admins = [ "GrafanaAdmin" ];
+            grafana_users = [ "Viewer" ];
+          };
+        };
+        scopeMaps.grafana_users = [
+          "email"
+          "profile"
+          "openid"
+          "groups"
+          "roles"
+          "offline_access"
+        ];
+        originLanding = "https://grafana.${config.momo-cloud.networking.domain}/login/generic_oauth";
+      };
+    };
+  };
+}

modules/monitoring-server/loki.nix

@@ -0,0 +1,108 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.momo-cloud.monitoring-server;
+in
+{
+  options.momo-cloud.monitoring-server.loki = {
+    basicAuth = lib.mkOption {
+      description = "Loki basic auth file contents for nginx";
+      type = lib.types.str;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.nginx.virtualHosts."loki.${config.momo-cloud.networking.domain}" = {
+      enableACME = true;
+      forceSSL = true;
+      locations."/" = {
+        proxyPass = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}";
+        proxyWebsockets = true;
+        basicAuthFile = pkgs.writeText "loki-basic-auth-file" cfg.loki.basicAuth;
+      };
+    };
+
+    # source: https://gist.github.com/rickhull/895b0cb38fdd537c1078a858cf15d63e
+    # https://grafana.com/docs/loki/latest/configure/examples/#1-local-configuration-exampleyaml
+    services.loki = {
+      enable = true;
+      configuration = {
+        server = {
+          http_listen_address = "127.0.0.1";
+          http_listen_port = 3100;
+        };
+        auth_enabled = true;
+        common = {
+          ring = {
+            instance_enable_ipv6 = true;
+            kvstore = {
+              store = "inmemory";
+            };
+          };
+          replication_factor = 1;
+          path_prefix = "/var/lib/loki";
+          storage = {
+            filesystem = {
+              chunks_directory = "chunks/";
+              rules_directory = "rules/";
+            };
+          };
+        };
+        ingester = {
+          chunk_encoding = "snappy";
+          chunk_idle_period = "1h";
+        };
+        query_range = {
+          results_cache = {
+            cache = {
+              embedded_cache = {
+                enabled = true;
+                max_size_mb = 500;
+              };
+            };
+          };
+        };
+        chunk_store_config = {
+          chunk_cache_config = {
+            embedded_cache = {
+              enabled = true;
+              max_size_mb = 500;
+              ttl = "24h";
+            };
+          };
+        };
+        # Keep logs for 4 weeks
+        # https://grafana.com/docs/loki/latest/operations/storage/retention/
+        limits_config = {
+          retention_period = "4w";
+          split_queries_by_interval = "0";
+        };
+        compactor = {
+          compaction_interval = "10m";
+          delete_request_store = "filesystem";
+          retention_enabled = true;
+          retention_delete_delay = "2h";
+          retention_delete_worker_count = 150;
+        };
+        schema_config = {
+          configs = [
+            {
+              from = "2025-03-01";
+              store = "tsdb";
+              object_store = "filesystem";
+              schema = "v13";
+              index = {
+                prefix = "index_";
+                period = "24h";
+              };
+            }
+          ];
+        };
+      };
+    };
+  };
+}

modules/monitoring-server/prometheus.nix

@@ -0,0 +1,25 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.momo-cloud.monitoring-server;
+  prometheusPort = 9001;
+in
+{
+  config = lib.mkIf cfg.enable {
+    services.prometheus = {
+      enable = true;
+      listenAddress = "127.0.0.1";
+      port = prometheusPort;
+      scrapeConfigs = [
+        {
+          job_name = "node_exporters";
+          static_configs = [
+            {
+              targets = [ "127.0.0.1:9002" ];
+            }
+          ];
+        }
+      ];
+    };
+  };
+}

modules/nextcloud-signaling/default.nix

@@ -0,0 +1,37 @@
+{ config, lib, ... }:
+
+{
+  imports = [
+    ./signaling-server.nix
+  ];
+
+  options.momo-cloud.nextcloud-signaling = {
+    enable = lib.mkEnableOption "enable nextcloud-signaling-server and required components";
+    internalSecretFile = lib.mkOption {
+      type = lib.types.str;
+    };
+    hashKeyFile = lib.mkOption {
+      type = lib.types.str;
+    };
+    blockKeyFile = lib.mkOption {
+      type = lib.types.str;
+    };
+    janusApiKeyFile = lib.mkOption {
+      type = lib.types.str;
+    };
+    turnSecretFile = lib.mkOption {
+      type = lib.types.str;
+    };
+    nextcloudSecretFile = lib.mkOption {
+      type = lib.types.str;
+    };
+  };
+
+  config = lib.mkIf config.momo-cloud.nextcloud-signaling.enable {
+    momo-cloud.coturn.enable = true;
+    momo-cloud.janus-gw = {
+      enable = true;
+      apiKeyFile = config.momo-cloud.nextcloud-signaling.janusApiKeyFile;
+    };
+  };
+}

modules/nextcloud-signaling/signaling-server.nix

@@ -0,0 +1,87 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.momo-cloud.nextcloud-signaling;
+
+  port = 8916;
+
+  serverConfig = lib.generators.toINI { } {
+    app.trustedproxies = "127.0.0.1";
+
+    backend = {
+      backendtype = "static";
+      backends = "backend-nextcloud";
+    };
+
+    backend-nextcloud = {
+      secret = "##NEXTCLOUDSECRET##";
+      url = "https://cloud.${config.momo-cloud.networking.domain}";
+    };
+
+    clients.internalsecret = "##INTERNALSECRET##";
+
+    http.listen = "127.0.0.1:${toString port}";
+
+    mcu = {
+      type = "janus";
+      url = "wss://janus.${config.momo-cloud.networking.domain}";
+    };
+    nats.url = "nats://loopback";
+
+    sessions = {
+      hashKey = "##HASHKEY##";
+      blockKey = "##BLOCKKEY##";
+    };
+
+    turn = {
+      apikey = "##JANUSAPIKEY##";
+      secret = "##TURNSECRET##";
+      servers = "turn:turn.${config.momo-cloud.networking.domain}:${toString config.services.coturn.listening-port}?transport=udp,turn:turn.${config.momo-cloud.networking.domain}:${toString config.services.coturn.listening-port}?transport=tcp";
+    };
+  };
+
+  serverConfigFile = pkgs.writeText "nextcloud-signaling-server.cfg" serverConfig;
+
+  bootstrapConfig = pkgs.writeShellScript "bootstrap-signaling" ''
+    CFG=/etc/nextcloud-signaling-server.cfg
+
+    cp -f ${serverConfigFile} ''${CFG}
+
+    sed -ri "s/##NEXTCLOUDSECRET##/$(cat ${cfg.nextcloudSecretFile})/g" /etc/nextcloud-signaling-server.cfg
+    sed -ri "s/##INTERNALSECRET##/$(cat ${cfg.internalSecretFile})/g" /etc/nextcloud-signaling-server.cfg
+    sed -ri "s/##HASHKEY##/$(cat ${cfg.hashKeyFile})/g" /etc/nextcloud-signaling-server.cfg
+    sed -ri "s/##BLOCKKEY##/$(cat ${cfg.blockKeyFile})/g" /etc/nextcloud-signaling-server.cfg
+    sed -ri "s/##JANUSAPIKEY##/$(cat ${cfg.janusApiKeyFile})/g" /etc/nextcloud-signaling-server.cfg
+    sed -ri "s/##TURNSECRET##/$(cat ${cfg.turnSecretFile})/g" /etc/nextcloud-signaling-server.cfg
+  '';
+in
+{
+  config = lib.mkIf cfg.enable {
+    services.nginx.virtualHosts."signaling.${config.momo-cloud.networking.domain}" = {
+      forceSSL = true;
+      enableACME = true;
+
+      locations = {
+        "/" = {
+          proxyPass = "http://127.0.0.1:${toString port}/";
+          proxyWebsockets = true;
+        };
+      };
+    };
+
+    systemd.services.nextcloud-spreed-signaling = {
+      serviceConfig = {
+        StateDirectory = "nextcloud-spreed-signaling";
+        LimitNOFILE = 65536;
+        ExecStartPre = "!${bootstrapConfig}";
+        ExecStart = "${pkgs.nextcloud-spreed-signaling}/bin/server -config /etc/nextcloud-signaling-server.cfg";
+      };
+      wantedBy = [ "multi-user.target" ];
+    };
+  };
+}

modules/nextcloud/backup.nix

@@ -0,0 +1,23 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  config = lib.mkIf config.momo-cloud.nextcloud.enable {
+    momo-cloud.backups.restic.nextcloud = {
+      paths = [
+        "/var/lib/nextcloud/data"
+        "/tmp/nextcloud-backup.sql"
+      ];
+      backupPrepareCommand = ''
+        ${pkgs.sudo}/bin/sudo -u postgres ${pkgs.postgresql}/bin/pg_dump -d nextcloud > /tmp/nextcloud-backup.sql
+      '';
+      backupCleanupCommand = ''
+        rm /tmp/nextcloud-backup.sql
+      '';
+      initialize = true;
+    };
+  };
+}

modules/nextcloud/default.nix

@@ -0,0 +1,235 @@
+{
+  config,
+  pkgs,
+  flake,
+  lib,
+  ...
+}:
+{
+  imports = [
+    ./backup.nix
+    ./preview-generation.nix
+    ./talk.nix
+    ./federation.nix
+  ];
+
+  options.momo-cloud.nextcloud =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Whether to enable the kanidm identity management service
+      '';
+      adminPasswordFile = mkOption {
+        description = "File that holds the initial admin user password";
+        type = types.str;
+      };
+      secretsFile = mkOption {
+        description = "File that holds the nextcloud secrets";
+        type = types.str;
+      };
+      oidcSecretFile = mkOption {
+        description = "File that holds the OIDC secret";
+        type = types.str;
+      };
+      extraApps = mkOption {
+        description = "Extra apps to be installed";
+        type = types.attrsOf types.package;
+        default = { };
+      };
+    };
+
+  config = lib.mkIf config.momo-cloud.nextcloud.enable {
+    momo-cloud.acme.enable = true;
+    momo-cloud.http-server.enable = true;
+
+    services.nginx.virtualHosts."cloud.${config.momo-cloud.networking.domain}" = {
+      enableACME = true;
+      forceSSL = true;
+    };
+
+    services.nextcloud = {
+      hostName = "cloud.${config.momo-cloud.networking.domain}";
+      home = "/var/lib/nextcloud";
+
+      enable = true;
+      # When updating package, remember to update nextcloud30Packages in
+      # services.nextcloud.extraApps
+      package = pkgs.nextcloud30;
+      https = true;
+      secretFile = config.momo-cloud.nextcloud.secretsFile;
+      maxUploadSize = "1G";
+
+      configureRedis = true;
+
+      config = {
+        adminuser = "admin";
+        adminpassFile = config.momo-cloud.nextcloud.adminPasswordFile;
+        dbuser = "nextcloud";
+        dbtype = "pgsql";
+        dbname = "nextcloud";
+      };
+
+      settings = {
+        overwrite.cli.url = "https://cloud.${config.momo-cloud.networking.domain}";
+        overwriteprotocol = "https";
+
+        # installed = true;
+        default_phone_region = "+49";
+        mail_sendmailmode = "smtp";
+        mail_from_address = "nextcloud@${config.momo-cloud.networking.domain}";
+        mail_smtpmode = "smtp";
+        mail_smtpauthtype = "PLAIN";
+        mail_domain = config.momo-cloud.networking.domain;
+        mail_smtpname = config.momo-cloud.email-smtp.username;
+        mail_smtpsecure = config.momo-cloud.email-smtp.encryption;
+        mail_smtpauth = true;
+        mail_smtphost = config.momo-cloud.email-smtp.host;
+        mail_smtpport = config.momo-cloud.email-smtp.port;
+
+        # This is to allow connections to collabora and kanidm, among other services
+        # running on the same host
+        #
+        # https://docs.nextcloud.com/server/stable/admin_manual/configuration_server/config_sample_php_parameters.html?highlight=allow_local_remote_servers%20true
+        # https://github.com/ONLYOFFICE/onlyoffice-nextcloud/issues/293
+        allow_local_remote_servers = true;
+
+        auth.bruteforce.protection.enabled = true;
+        trashbin_retention_obligation = "auto,7";
+        defaultapp = "file";
+        activity_expire_days = "14";
+        integrity.check.disabled = false;
+        updater.release.channel = "stable";
+        loglevel = 2;
+        debug = false;
+        maintenance_window_start = "1";
+        # maintenance = false;
+        # app_install_overwrite = [
+        #   "pdfdraw"
+        #   "integration_whiteboard"
+        # ];
+        htaccess.RewriteBase = "/";
+        theme = "";
+        simpleSignUpLink.shown = false;
+
+        user_oidc.use_pkce = true;
+        allow_user_to_change_display_name = false;
+        lost_password_link = "disabled";
+
+        notify_push = {
+          enable = true;
+          bendDomainToLocalhost = true;
+        };
+      };
+
+      phpOptions = {
+        "opcache.interned_strings_buffer" = "32";
+        "opcache.max_accelerated_files" = "16229";
+        "opcache.memory_consumption" = "256";
+        # https://docs.nextcloud.com/server/latest/admin_manual/installation/server_tuning.html#enable-php-opcache
+        "opcache.revalidate_freq" = "60";
+        # https://docs.nextcloud.com/server/latest/admin_manual/installation/server_tuning.html#:~:text=opcache.jit%20%3D%201255%20opcache.jit_buffer_size%20%3D%20128m
+        "opcache.jit" = "1255";
+        "opcache.jit_buffer_size" = "128M";
+      };
+
+      # Calculated with 4GiB RAM, 80MiB process size available on
+      # https://spot13.com/pmcalculator/
+      poolSettings = {
+        pm = "dynamic";
+        "pm.max_children" = "52";
+        "pm.max_requests" = "500";
+        "pm.max_spare_servers" = "39";
+        "pm.min_spare_servers" = "13";
+        "pm.start_servers" = "13";
+      };
+
+      caching.redis = true;
+      # Don't allow the installation and updating of apps from the Nextcloud appstore,
+      # because we declaratively install them
+      appstoreEnable = false;
+      autoUpdateApps.enable = false;
+      extraApps = {
+        inherit (pkgs.nextcloud30Packages.apps)
+          calendar
+          contacts
+          groupfolders
+          user_oidc
+          quota_warning
+          notify_push
+          ;
+      } // config.momo-cloud.nextcloud.extraApps;
+
+      database.createLocally = true;
+    };
+
+    systemd.services."nextcloud-oidc-provisioning" =
+      let
+        occ = "/run/current-system/sw/bin/nextcloud-occ";
+      in
+      {
+        serviceConfig.Type = "oneshot";
+        wantedBy = [ "multi-user.target" ];
+
+        after = [ "nextcloud-setup.service" ];
+        script =
+          let
+            adminGroupName = "nextcloud_admins@account.${config.momo-cloud.networking.domain}";
+          in
+          ''
+            CLIENT_SECRET=$(cat "${config.momo-cloud.nextcloud.oidcSecretFile}")
+
+            ${occ} user_oidc:provider "kanidm" || \
+              ${occ} user_oidc:provider --clientid nextcloud \
+                --clientsecret "''${CLIENT_SECRET}" \
+                --discoveryuri=https://account.${config.momo-cloud.networking.domain}/oauth2/openid/nextcloud/.well-known/openid-configuration \
+                --scope="openid email profile groups" \
+                --mapping-uid="preferred_username" \
+                --mapping-groups="groups" \
+                --group-provisioning=1 \
+                --unique-uid=0 \
+                kanidm
+
+            [ "''$(${occ} config:app:get user_oidc allow_multiple_user_backends)" == "0" ] || \
+              ${occ} config:app:set --value=0 user_oidc allow_multiple_user_backends
+
+            ${occ} group:info ${adminGroupName} || \
+              ${occ} group:add ${adminGroupName}
+
+            [ "''$(${occ} admin-delegation:show | grep -F 'OCA\GroupFolders\Settings\Admin' | grep -c '${adminGroupName}')" != "0" ] || \
+              ${occ} admin-delegation:add 'OCA\GroupFolders\Settings\Admin' ${adminGroupName}
+
+            [ "''$(${occ} admin-delegation:show | grep -F 'OCA\Settings\Settings\Admin\Users' | grep -c '${adminGroupName}')" != "0" ] || \
+              ${occ} admin-delegation:add 'OCA\Settings\Settings\Admin\Users' ${adminGroupName}
+
+            [ "''$(${occ} admin-delegation:show | grep -F 'OCA\Settings\Settings\Admin\Sharing' | grep -c '${adminGroupName}')" != "0" ] || \
+              ${occ} admin-delegation:add 'OCA\Settings\Settings\Admin\Sharing' ${adminGroupName}
+          '';
+      };
+
+    services.kanidm.provision = {
+      groups.nextcloud_users = {
+        memberless = true;
+      };
+
+      groups.nextcloud_admins = {
+        memberless = true;
+      };
+
+      systems.oauth2."nextcloud" = {
+        displayName = "nextcloud";
+        originUrl = "https://cloud.${config.momo-cloud.networking.domain}/apps/user_oidc/code";
+        basicSecretFile = config.momo-cloud.nextcloud.oidcSecretFile;
+        preferShortUsername = true;
+        scopeMaps.nextcloud_users = [
+          "email"
+          "profile"
+          "openid"
+          "groups"
+        ];
+        originLanding = "https://cloud.${config.momo-cloud.networking.domain}/";
+      };
+    };
+  };
+}

modules/nextcloud/federation.nix

@@ -0,0 +1,37 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.nextcloud.federation =
+    let
+      inherit (lib) mkOption types;
+    in
+    {
+      enable = mkOption {
+        description = ''
+          Whether to enable the nextcloud federation module
+        '';
+        type = types.bool;
+        default = config.momo-cloud.nextcloud.enable;
+      };
+    };
+  config = lib.mkIf config.momo-cloud.nextcloud.federation.enable {
+    systemd.services."nextcloud-federation-provisioning" =
+      let
+        occ = "/run/current-system/sw/bin/nextcloud-occ";
+      in
+      {
+        serviceConfig.Type = "oneshot";
+        wantedBy = [ "multi-user.target" ];
+
+        after = [ "nextcloud-setup.service" ];
+        script = ''
+          ${occ} app:enable federation
+          ${occ} app:enable federatedfilesharing
+        '';
+      };
+  };
+}

modules/nextcloud/preview-generation.nix

@@ -0,0 +1,116 @@
+{
+  config,
+  pkgs,
+  flake,
+  lib,
+  ...
+}:
+{
+  config = lib.mkIf config.momo-cloud.nextcloud.enable {
+    services.nextcloud = {
+      extraApps = {
+        inherit (pkgs.nextcloud30Packages.apps)
+          previewgenerator
+          ;
+      };
+      settings = {
+        enable_previews = true;
+        jpeg_quality = 60;
+        enabledPreviewProviders = [
+          "OC\\Preview\\PNG"
+          "OC\\Preview\\JPEG"
+          "OC\\Preview\\GIF"
+          "OC\\Preview\\BMP"
+          "OC\\Preview\\HEIC"
+          "OC\\Preview\\TIFF"
+          "OC\\Preview\\XBitmap"
+          "OC\\Preview\\SVG"
+          "OC\\Preview\\WebP"
+          "OC\\Preview\\Font"
+          "OC\\Preview\\Movie"
+          "OC\\Preview\\ImaginaryPDF"
+          "OC\\Preview\\MP3"
+          "OC\\Preview\\OpenDocument"
+          "OC\\Preview\\Krita"
+          "OC\\Preview\\TXT"
+          "OC\\Preview\\MarkDown"
+          "OC\\Preview\\Imaginary"
+        ];
+        preview_imaginary_url = "http://127.0.0.1:${toString config.services.imaginary.port}/";
+        preview_max_filesize_image = 128; # MB
+        preview_max_memory = 512; # MB
+        preview_max_x = 2048; # px
+        preview_max_y = 2048; # px
+        preview_max_scale_factor = 1;
+        "preview_ffmpeg_path" = lib.getExe pkgs.ffmpeg-headless;
+      };
+    };
+
+    # https://docs.nextcloud.com/server/30/admin_manual/installation/server_tuning.html#previews
+    services.imaginary = {
+      enable = true;
+      address = "127.0.0.1";
+      settings.return-size = true;
+    };
+
+    systemd = {
+      services =
+        let
+          occ = "/run/current-system/sw/bin/nextcloud-occ";
+        in
+        {
+          nextcloud-cron-preview-generator = {
+            environment.NEXTCLOUD_CONFIG_DIR = "${config.services.nextcloud.home}/config";
+            serviceConfig = {
+              ExecStart = "${occ} preview:pre-generate";
+              Type = "oneshot";
+              User = "nextcloud";
+            };
+          };
+
+          nextcloud-preview-generator-setup = {
+            wantedBy = [ "multi-user.target" ];
+            requires = [ "phpfpm-nextcloud.service" ];
+            after = [ "phpfpm-nextcloud.service" ];
+            environment.NEXTCLOUD_CONFIG_DIR = "${config.services.nextcloud.home}/config";
+            script = # bash
+              ''
+                # check with:
+                # for size in squareSizes widthSizes heightSizes; do echo -n "$size: "; nextcloud-occ config:app:get previewgenerator $size; done
+
+                # extra commands run for preview generator:
+                # 32   icon file list
+                # 64   icon file list android app, photos app
+                # 96   nextcloud client VFS windows file preview
+                # 256  file app grid view, many requests
+                # 512  photos app tags
+                ${occ} config:app:set --value="32 64 96 256 512" previewgenerator squareSizes
+
+                # 341 hover in maps app
+                # 1920 files/photos app when viewing picture
+                ${occ} config:app:set --value="341 1920" previewgenerator widthSizes
+
+                # 256 hover in maps app
+                # 1080 files/photos app when viewing picture
+                ${occ} config:app:set --value="256 1080" previewgenerator heightSizes
+              '';
+            serviceConfig = {
+              Type = "oneshot";
+              User = "nextcloud";
+            };
+          };
+        };
+      timers.nextcloud-cron-preview-generator = {
+        after = [ "nextcloud-setup.service" ];
+        timerConfig = {
+          OnCalendar = "*:0/10";
+          OnUnitActiveSec = "9m";
+          Persistent = true;
+          RandomizedDelaySec = 60;
+          Unit = "nextcloud-cron-preview-generator.service";
+        };
+        wantedBy = [ "timers.target" ];
+      };
+    };
+  };
+}

modules/nextcloud/talk.nix

@@ -0,0 +1,54 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.nextcloud.talk =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Whether to enable the nextcloud talk module
+      '';
+      coturnStaticAuthSecretFile = mkOption {
+        description = "File that holds the coturn static auth secret";
+        type = types.str;
+      };
+      signalingSecretFile = mkOption {
+        description = "File that holds the signaling server secret";
+        type = types.str;
+      };
+    };
+  config = lib.mkIf config.momo-cloud.nextcloud.enable {
+    momo-cloud.nextcloud.extraApps = {
+      inherit (pkgs.nextcloud30Packages.apps)
+        spreed
+        ;
+    };
+
+    systemd.services."nextcloud-talk-provisioning" =
+      let
+        occ = "/run/current-system/sw/bin/nextcloud-occ";
+      in
+      {
+        serviceConfig.Type = "oneshot";
+        wantedBy = [ "multi-user.target" ];
+
+        after = [ "nextcloud-setup.service" ];
+        script = ''
+          TURN_SECRET=$(cat ${config.momo-cloud.nextcloud.talk.coturnStaticAuthSecretFile})
+
+          [ "''$(${occ} talk:turn:list | grep 'server:' | grep -c 'turn.${config.momo-cloud.networking.domain}')" != "0" ] || \
+            ${occ} talk:turn:add turns turn.${config.momo-cloud.networking.domain} udp,tcp --secret $TURN_SECRET
+
+          SIGNALING_SECRET=$(cat ${config.momo-cloud.nextcloud.talk.signalingSecretFile})
+
+          [ "''$(${occ} talk:signaling:list | grep 'server:' | grep -c 'signaling.${config.momo-cloud.networking.domain}')" != "0" ] || \
+            ${occ} talk:signaling:add https://signaling.${config.momo-cloud.networking.domain} $SIGNALING_SECRET --verify
+        '';
+      };
+  };
+}

modules/paperless/default.nix

@@ -0,0 +1,127 @@
+{
+  lib,
+  config,
+  ...
+}:
+let
+  backupDir = "/var/backups/paperless";
+  nixpkgs-master = builtins.fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/8852da7e72ef9f41684d83925c2f428b06587a29.tar.gz";
+    sha256 = "sha256:0q2ww87kqn9bard90x8w5r30gbcyjk07zngfwr2ap3pbs4rzpjxi";
+  };
+in
+{
+  # Pull in early https://github.com/paperless-ngx/paperless-ngx/pull/9039
+  imports = [
+    (nixpkgs-master + "/nixos/modules/services/misc/paperless.nix")
+  ];
+
+  disabledModules = [
+    "services/misc/paperless.nix"
+  ];
+
+  options.momo-cloud.paperless = with lib; {
+    enable = mkEnableOption "Enable paperless instance";
+    setup = mkEnableOption "Setup config, e.g. enablign regular login";
+
+    dataDir = mkOption {
+      description = "Paperless data directory";
+      type = types.str;
+      default = "/var/lib/paperless";
+    };
+
+    consumptionDir = mkOption {
+      description = "Paperless consumption directory";
+      type = types.str;
+      default = "/var/lib/paperless/consume";
+    };
+
+    envFile = mkOption { type = types.str; };
+    oidcSecretFile = mkOption { type = types.str; };
+    superuserPasswordFile = mkOption { type = types.str; };
+  };
+
+  config = lib.mkIf config.momo-cloud.paperless.enable {
+    security.acme.certs."paperless.${config.momo-cloud.networking.domain}" = { };
+
+    services.nginx.virtualHosts = {
+      "paperless.${config.momo-cloud.networking.domain}" = {
+        forceSSL = true;
+        useACMEHost = "paperless.${config.momo-cloud.networking.domain}";
+        listenAddresses = [
+          config.momo-cloud.wireguard.ipv4.address
+          "[${config.momo-cloud.wireguard.ipv6.address}]"
+        ];
+        locations."/".proxyPass = "http://127.0.0.1:${builtins.toString config.services.paperless.port}";
+      };
+    };
+
+    services.paperless = {
+      enable = true;
+      consumptionDir = config.momo-cloud.paperless.consumptionDir;
+      dataDir = config.momo-cloud.paperless.dataDir;
+      address = "127.0.0.1";
+      passwordFile = config.momo-cloud.paperless.superuserPasswordFile;
+      settings = {
+        PAPERLESS_ADMIN_USER = "admin@account.${config.momo-cloud.networking.domain}";
+        PAPERLESS_OCR_LANGUAGE = "deu+eng";
+        PAPERLESS_OCR_USER_ARGS = ''{"invalidate_digital_signatures": true}'';
+        PAPERLESS_URL = "https://paperless.${config.momo-cloud.networking.domain}";
+        PAPERLESS_DISABLE_REGULAR_LOGIN = if config.momo-cloud.paperless.setup then "false" else "true";
+        PAPERLESS_APPS = "allauth.socialaccount.providers.openid_connect";
+        PAPERLESS_SOCIAL_ACCOUNT_SYNC_GROUPS = "true";
+        PAPERLESS_SOCIAL_ACCOUNT_DEFAULT_GROUPS = "paperless_users";
+        PAPERLESS_SOCIALACCOUNT_AUTO_SIGNUP = "true";
+        PAPERLESS_SOCIALACCOUNT_EMAIL_AUTHENTICATION_AUTO_CONNECT = "true";
+        PAPERLESS_ACCOUNT_SESSION_REMEMBER = "true";
+        PAPERLESS_EMAIL_TASK_CRON = "*/2 * * * *";
+      };
+    };
+
+    services.kanidm.provision = {
+      groups.paperless_users = {
+        memberless = true;
+      };
+      groups.paperless_admins = {
+        memberless = true;
+      };
+
+      systems.oauth2."paperless" = {
+        displayName = "paperless";
+        originUrl = "https://paperless.${config.momo-cloud.networking.domain}/accounts/oidc/kanidm/login/callback/";
+        basicSecretFile = config.momo-cloud.paperless.oidcSecretFile;
+        preferShortUsername = true;
+        scopeMaps.paperless_users = [
+          "email"
+          "profile"
+          "openid"
+          "groups"
+        ];
+        originLanding = "https://paperless.${config.momo-cloud.networking.domain}/accounts/login/";
+      };
+    };
+
+    systemd.services.paperless-web.serviceConfig.EnvironmentFile = [
+      config.momo-cloud.paperless.envFile
+    ];
+
+    #################################
+    # Backups
+    #################################
+
+    systemd.tmpfiles.rules = [
+      "d '${config.momo-cloud.paperless.dataDir}' 0700 paperless paperless - -"
+      "d '${backupDir}' 0700 paperless paperless - -"
+      "d '${config.momo-cloud.paperless.consumptionDir}' 0700 paperless paperless - -"
+    ];
+
+    momo-cloud.backups.restic.paperless = {
+      paths = [ backupDir ];
+      initialize = true;
+      backupPrepareCommand = "${config.momo-cloud.paperless.dataDir}/paperless-manage document_exporter ${backupDir} -c -p";
+      backupCleanupCommand = ''
+        rm -rf ${backupDir}/*
+      '';
+    };
+  };
+}

modules/postgresql/default.nix

@@ -0,0 +1,37 @@
+{
+  lib,
+  config,
+  ...
+}:
+{
+  options.momo-cloud.postgresql = with lib; {
+    enable = mkEnableOption "Enable postgres with sane default settings";
+  };
+
+  config = lib.mkIf config.momo-cloud.postgresql.enable {
+    services.postgresql = {
+      enable = true;
+      # Required for MediaWiki, connects via docker network
+      enableTCPIP = true;
+      # https://pgtune.leopard.in.ua/ DB Version: 14 OS Type: linux DB Type: web
+      # Total Memory (RAM): 8 GB Data Storage: ssd
+      settings = {
+        max_connections = 200;
+        shared_buffers = "2GB";
+        effective_cache_size = "6GB";
+        maintenance_work_mem = "512MB";
+        checkpoint_completion_target = 0.9;
+        wal_buffers = "16MB";
+        default_statistics_target = 100;
+        random_page_cost = 1.1;
+        effective_io_concurrency = 200;
+        work_mem = "5242kB";
+        huge_pages = "off";
+        min_wal_size = "1GB";
+        max_wal_size = "4GB";
+        # ZFS is always consistent (Copy-On-Write)
+        full_page_writes = false;
+      };
+    };
+  };
+}

modules/proxy/authelia-authrequest.conf

@@ -0,0 +1,32 @@
+## Send a subrequest to Authelia to verify if the user is authenticated and has permission to access the resource.
+auth_request /internal/authelia/authz;
+
+## Save the upstream metadata response headers from Authelia to variables.
+auth_request_set $user $upstream_http_remote_user;
+auth_request_set $groups $upstream_http_remote_groups;
+auth_request_set $name $upstream_http_remote_name;
+auth_request_set $email $upstream_http_remote_email;
+
+## Inject the metadata response headers from the variables into the request made to the backend.
+proxy_set_header Remote-User $user;
+proxy_set_header Remote-Groups $groups;
+proxy_set_header Remote-Email $email;
+proxy_set_header Remote-Name $name;
+
+## Configure the redirection when the authz failure occurs. Lines starting with 'Modern Method' and 'Legacy Method'
+## should be commented / uncommented as pairs. The modern method uses the session cookies configuration's authelia_url
+## value to determine the redirection URL here. It's much simpler and compatible with the mutli-cookie domain easily.
+
+## Modern Method: Set the $redirection_url to the Location header of the response to the Authz endpoint.
+auth_request_set $redirection_url $upstream_http_location;
+
+## Modern Method: When there is a 401 response code from the authz endpoint redirect to the $redirection_url.
+error_page 401 =302 $redirection_url;
+
+## Legacy Method: Set $target_url to the original requested URL.
+## This requires http_set_misc module, replace 'set_escape_uri' with 'set' if you don't have this module.
+# set_escape_uri $target_url $scheme://$http_host$request_uri;
+
+## Legacy Method: When there is a 401 response code from the authz endpoint redirect to the portal with the 'rd'
+## URL parameter set to $target_url. This requires users update 'auth.example.com/' with their external authelia URL.
+# error_page 401 =302 https://auth.example.com/?rd=$target_url;

modules/proxy/authelia-location.conf

@@ -0,0 +1,30 @@
+## Virtual endpoint created by nginx to forward auth requests.
+location /internal/authelia/authz {
+    ## Essential Proxy Configuration
+    internal;
+    proxy_pass $upstream_authelia;
+
+    ## Headers
+    ## The headers starting with X-* are required.
+    proxy_set_header X-Original-Method $request_method;
+    proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
+    proxy_set_header X-Forwarded-For $remote_addr;
+    proxy_set_header Content-Length "";
+    proxy_set_header Connection "";
+
+    ## Basic Proxy Configuration
+    proxy_pass_request_body off;
+    proxy_next_upstream error timeout invalid_header http_500 http_502 http_503; # Timeout if the real server is dead
+    proxy_redirect http:// $scheme://;
+    proxy_http_version 1.1;
+    proxy_cache_bypass $cookie_session;
+    proxy_no_cache $cookie_session;
+    proxy_buffers 4 32k;
+    client_body_buffer_size 128k;
+
+    ## Advanced Proxy Configuration
+    send_timeout 5m;
+    proxy_read_timeout 240;
+    proxy_send_timeout 240;
+    proxy_connect_timeout 240;
+}

modules/proxy/default.nix

@@ -0,0 +1,26 @@
+{
+  flake,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.proxy = with lib; {
+    enable = mkEnableOption "Enable nginx proxy settings";
+  };
+
+  config = lib.mkIf config.momo-cloud.proxy.enable {
+    momo-cloud.http-server.enable = true;
+
+    environment.etc = {
+      "nginx/conf-available/proxy.conf".source = ./proxy.conf;
+      "nginx/conf-available/authelia-location.conf".text =
+        ''
+          set $upstream_authelia https://auth.${config.momo-cloud.networking.domain}/api/authz/auth-request;
+        ''
+        + (builtins.readFile ./authelia-location.conf);
+      "nginx/conf-available/authelia-authrequest.conf".source = ./authelia-authrequest.conf;
+    };
+  };
+}

modules/proxy/proxy.conf

@@ -0,0 +1,28 @@
+## Headers
+proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
+proxy_set_header X-Forwarded-URI $request_uri;
+proxy_set_header X-Forwarded-Ssl on;
+
+## Basic Proxy Configuration
+client_body_buffer_size 128k;
+proxy_next_upstream error timeout invalid_header http_500 http_502 http_503; ## Timeout if the real server is dead.
+proxy_redirect  http://  $scheme://;
+proxy_http_version 1.1;
+proxy_cache_bypass $cookie_session;
+proxy_no_cache $cookie_session;
+proxy_buffers 64 256k;
+
+## Trusted Proxies Configuration
+## Please read the following documentation before configuring this:
+##     https://www.authelia.com/integration/proxies/nginx/#trusted-proxies
+set_real_ip_from 10.30.30.0/24;
+set_real_ip_from fd00:30:30:30:30::/80;
+
+real_ip_header X-Forwarded-For;
+real_ip_recursive on;
+
+## Advanced Proxy Configuration
+send_timeout 5m;
+proxy_read_timeout 360;
+proxy_send_timeout 360;
+proxy_connect_timeout 360;

modules/solidtime/default.nix

@@ -0,0 +1,162 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  backupDir = "/var/backups/solidtime";
+  domain = "timetracking.${config.momo-cloud.networking.domain}";
+in
+{
+  options.momo-cloud.solidtime = with lib; {
+    enable = mkEnableOption "Enable solidtime instance";
+
+    superAdmins = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+    };
+    envFile = mkOption { type = types.str; };
+    dbEnvFile = mkOption { type = types.str; };
+  };
+
+  config =
+    let
+      superAdmins = lib.strings.concatStringsSep "," config.momo-cloud.solidtime.superAdmins;
+      defaultEnvironment = {
+        SUPER_ADMINS = superAdmins;
+        APP_URL = "https://timetracking.${config.momo-cloud.networking.domain}";
+      };
+    in
+    lib.mkIf config.momo-cloud.solidtime.enable {
+      momo-cloud.http-server.enable = true;
+      momo-cloud.acme.enable = true;
+      momo-cloud.docker.enable = true;
+
+      security.acme.certs = {
+        "${domain}" = { };
+      };
+
+      services.nginx.virtualHosts = {
+        "${domain}" = {
+          forceSSL = true;
+          useACMEHost = domain;
+          listenAddresses = [
+            config.momo-cloud.wireguard.ipv4.address
+            "[${config.momo-cloud.wireguard.ipv6.address}]"
+          ];
+          locations."/".proxyPass = "http://127.0.0.1:8000";
+        };
+      };
+
+      systemd.services."docker-network-solidtime" =
+        let
+          docker = config.virtualisation.oci-containers.backend;
+          dockerBin = "${pkgs.${docker}}/bin/${docker}";
+        in
+        {
+          serviceConfig.Type = "oneshot";
+          before = [ "docker-solidtime.service" ];
+          requiredBy = [ "docker-solidtime.service" ];
+          script = ''
+            ${dockerBin} network inspect solidtime >/dev/null 2>&1 || ${dockerBin} network create solidtime --subnet 172.20.0.0/24
+          '';
+        };
+
+      virtualisation = {
+        oci-containers = {
+          backend = "docker";
+
+          containers."solidtime" = {
+            image = "solidtime/solidtime:latest";
+            autoStart = true;
+            volumes = [
+              "/var/lib/solidtime/storage:/var/www/html/storage"
+              "${config.momo-cloud.solidtime.envFile}:/var/www/html/.env"
+            ];
+            extraOptions = [
+              "--network=solidtime"
+              "--add-host=mail.momo.koeln:host-gateway"
+              "--health-cmd"
+              "curl --fail http://localhost:8000/health-check/up || exit 1"
+            ];
+            environment = defaultEnvironment // {
+              CONTAINER_MODE = "http";
+              AUTO_DB_MIGRATE = "true";
+            };
+            ports = [ "127.0.0.1:8000:8000" ];
+            dependsOn = [ "solidtime-db" ];
+          };
+
+          containers."solidtime-scheduler" = {
+            image = "solidtime/solidtime:latest";
+            autoStart = true;
+            volumes = [
+              "/var/lib/solidtime/storage:/var/www/html/storage"
+              "${config.momo-cloud.solidtime.envFile}:/var/www/html/.env"
+            ];
+            extraOptions = [
+              "--network=solidtime"
+              "--add-host=mail.momo.koeln:host-gateway"
+              "--health-cmd"
+              "supervisorctl status scheduler:scheduler_00"
+            ];
+            environment = defaultEnvironment // {
+              CONTAINER_MODE = "scheduler";
+            };
+            dependsOn = [ "solidtime-db" ];
+          };
+
+          containers."solidtime-queue" = {
+            image = "solidtime/solidtime:latest";
+            autoStart = true;
+            volumes = [
+              "/var/lib/solidtime/storage:/var/www/html/storage"
+              "${config.momo-cloud.solidtime.envFile}:/var/www/html/.env"
+            ];
+            extraOptions = [
+              "--network=solidtime"
+              "--add-host=mail.momo.koeln:host-gateway"
+              "--health-cmd"
+              "supervisorctl status worker:worker_00"
+            ];
+            environment = defaultEnvironment // {
+              CONTAINER_MODE = "worker";
+              WORKER_COMMAND = "php /var/www/html/artisan queue:work";
+            };
+            dependsOn = [ "solidtime-db" ];
+          };
+
+          containers."solidtime-db" = {
+            image = "postgres:16";
+            autoStart = true;
+            volumes = [
+              "/var/lib/solidtime/db:/var/lib/postgresql/data"
+            ];
+            extraOptions = [ "--network=solidtime" ];
+            environmentFiles = [
+              config.momo-cloud.solidtime.dbEnvFile
+            ];
+          };
+        };
+      };
+
+      systemd.tmpfiles.rules = [
+        "d '${backupDir}' 0700 root root - -"
+      ];
+
+      momo-cloud.backups.restic.solidtime = {
+        paths = [
+          backupDir
+          "/var/lib/solidtime/storage"
+        ];
+        initialize = true;
+        backupPrepareCommand = ''
+          ${pkgs.docker-client}/bin/docker exec -t solidtime-db pg_dumpall -c -U solidtime > "${backupDir}/postgres.sql"
+        '';
+        backupCleanupCommand = ''
+          rm -rf ${backupDir}/*
+        '';
+      };
+    };
+}

modules/static-website/default.nix

@@ -0,0 +1,66 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.static-website =
+    let
+      inherit (lib) mkOption mkEnableOption types;
+    in
+    {
+      enable = mkEnableOption ''
+        Enable static website config for the base HTTP server. This will run at www. and the bare domain.
+      '';
+
+      root = mkOption {
+        description = "Nix derivation or path that holds the static website files";
+        type = types.oneOf [
+          types.package
+          types.path
+        ];
+      };
+    };
+
+  config = lib.mkIf config.momo-cloud.static-website.enable {
+    momo-cloud.acme.enable = true;
+    momo-cloud.http-server.enable = true;
+
+    services.nginx.virtualHosts = {
+      "www.${config.momo-cloud.networking.domain}" = {
+        enableACME = true;
+        forceSSL = true;
+
+        extraConfig = ''
+          error_log /dev/null;
+          access_log /dev/null;
+        '';
+
+        locations."/" = {
+          extraConfig = ''
+            return 301 https://${config.momo-cloud.networking.domain}$request_uri;
+          '';
+        };
+      };
+
+      "${config.momo-cloud.networking.domain}" = {
+        default = true;
+        enableACME = true;
+        forceSSL = true;
+
+        extraConfig = ''
+          error_log /dev/null;
+          access_log /dev/null;
+        '';
+
+        locations = {
+          "/" = {
+            root = config.momo-cloud.static-website.root;
+            index = "index.html";
+            tryFiles = "$uri $uri/ =404";
+          };
+        };
+      };
+    };
+  };
+}

modules/unlock-luks-on-boot/default.nix

@@ -0,0 +1,35 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.unlock-luks-on-boot = with lib; {
+    enable = mkEnableOption "Enable LUKS unlocking in initrd";
+  };
+
+  config = lib.mkIf config.momo-cloud.unlock-luks-on-boot.enable {
+    momo-cloud.http-server.enable = true;
+    boot.initrd.network = {
+      enable = true;
+      ssh = {
+        enable = true;
+        # To prevent ssh clients from freaking out because a different host key is used,
+        # a different port for ssh is useful (assuming the same host has also a regular sshd running)
+        port = 2222;
+
+        # Please create this manually the first time.
+        hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
+        authorizedKeys = lib.lists.foldl (
+          sshPubKeys: userConfig:
+          sshPubKeys
+          ++ (if userConfig ? "sshPubKeys" then lib.attrsets.attrValues userConfig.sshPubKeys else [ ])
+        ) [ ] (lib.attrsets.attrValues config.momo-cloud.authentication.users);
+      };
+      postCommands = ''
+        # Automatically ask for the password on SSH login
+        echo 'cryptsetup-askpass || echo "Unlock was successful; exiting SSH session" && exit 1' >> /root/.profile
+      '';
+    };
+  };
+}

modules/unlock-zfs-on-boot/default.nix

@@ -0,0 +1,44 @@
+{
+  config,
+  lib,
+  ...
+}:
+{
+  options.momo-cloud.unlock-zfs-on-boot = with lib; {
+    enable = mkEnableOption "Enable ZFS unlocking in initrd";
+  };
+
+  config = lib.mkIf config.momo-cloud.unlock-zfs-on-boot.enable {
+    # From https://nixos.wiki/wiki/ZFS#Unlock_encrypted_zfs_via_ssh_on_boot
+    boot.initrd.network = {
+      enable = true;
+      ssh = {
+        enable = true;
+        # To prevent ssh clients from freaking out because a different host key is used,
+        # a different port for ssh is useful (assuming the same host has also a regular sshd running)
+        port = 2222;
+
+        # Please create this manually the first time.
+        hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
+        authorizedKeys = lib.lists.foldl (
+          sshPubKeys: userConfig:
+          sshPubKeys
+          ++ (if userConfig ? "sshPubKeys" then lib.attrsets.attrValues userConfig.sshPubKeys else [ ])
+        ) [ ] (lib.attrsets.attrValues config.momo-cloud.authentication.users);
+      };
+      # this will automatically load the zfs password prompt on login
+      # and kill the other prompt so boot can continue
+      postCommands = ''
+        cat <<EOF > /root/.profile
+        if pgrep -x "zfs" > /dev/null
+        then
+          zfs load-key -a
+          killall zfs
+        else
+          echo "zfs not running -- maybe the pool is taking some time to load for some unforseen reason."
+        fi
+        EOF
+      '';
+    };
+  };
+}

modules/wireguard/default.nix

@@ -0,0 +1,66 @@
+{
+  config,
+  flake,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.momo-cloud.wireguard;
+  wireguardDevicesForUsers = import ../../lib/wireguardDevicesForUsers.nix { inherit lib; };
+in
+{
+  options.momo-cloud.wireguard = with lib; {
+    enable = mkEnableOption "Enable wireguard network";
+    openFirewall = mkOption {
+      type = types.bool;
+      default = false;
+    };
+    privateKeyFile = mkOption { type = types.str; };
+    listenPort = mkOption {
+      type = types.int;
+      default = 51820;
+    };
+    mtu = mkOption {
+      type = types.int;
+      default = 1300;
+    };
+    additionalPeers = mkOption {
+      type = types.listOf types.attrs;
+      default = [ ];
+    };
+    ipv4.address = mkOption { type = types.str; };
+    ipv6.address = mkOption { type = types.str; };
+  };
+
+  config = lib.mkIf cfg.enable {
+    networking.firewall.allowedUDPPorts = lib.mkIf cfg.openFirewall [ cfg.listenPort ];
+
+    networking.wireguard.interfaces = {
+      wg-ssh = {
+        listenPort = cfg.listenPort;
+        mtu = cfg.mtu;
+        ips = [
+          "${config.momo-cloud.wireguard.ipv4.address}/32"
+          "${config.momo-cloud.wireguard.ipv6.address}/96"
+        ];
+        privateKeyFile = config.momo-cloud.wireguard.privateKeyFile;
+        peers =
+          (wireguardDevicesForUsers config.momo-cloud.authentication.users)
+          ++ cfg.additionalPeers;
+      };
+    };
+
+    services.openssh.openFirewall = true;
+    #services.openssh.listenAddresses = [
+    #  {
+    #    addr = config.momo-cloud.wireguard.ipv4.address;
+    #    port = 22;
+    #  }
+    #  {
+    #    addr = "[${config.momo-cloud.wireguard.ipv6.address}]";
+    #    port = 22;
+    #  }
+    #];
+  };
+}

overlays/default.nix

@@ -0,0 +1,47 @@
+{
+  lib,
+  inputs,
+  ...
+}:
+{
+  flake = {
+    nixosModules = rec {
+      overlays = (
+        { ... }:
+        {
+          nixpkgs.overlays = lib.mkForce [
+            inputs.invoiceplane-template.overlays.default
+            (final: prev: (import ../pkgs { pkgs = final; }))
+
+            (
+              final: prev:
+              let
+                nixpkgs-unstable = import inputs.nixpkgs-unstable { system = prev.system; };
+
+                nixpkgs-master = import inputs.nixpkgs-master { system = prev.system; };
+
+                nixpkgs-nc-spreed-signaling = import inputs.nixpkgs-nc-spreed-signaling-pr {
+                  system = prev.system;
+                };
+              in
+              {
+                authelia = nixpkgs-unstable.authelia;
+                kanidm-provision = prev.kanidm-provision.overrideAttrs (oldAttrs: {
+                  patches = (oldAttrs.patches or [ ]) ++ [
+                    (prev.fetchpatch {
+                      url = "https://patch-diff.githubusercontent.com/raw/oddlama/kanidm-provision/pull/19.diff";
+                      hash = "sha256-cfn2gBHd8XfGZ63vMPvqyIHmUDXnyb/6574ic43rJks=";
+                    })
+                  ];
+                });
+                paperless-ngx = nixpkgs-master.paperless-ngx;
+
+                nextcloud-spreed-signaling = nixpkgs-nc-spreed-signaling.nextcloud-spreed-signaling;
+              }
+            )
+          ];
+        }
+      );
+    };
+  };
+}

pkgs/autofetch-hostingde-invoices.nix

@@ -0,0 +1,46 @@
+self: with self; ''
+  set -e
+
+  PATH="$PATH:${jq}/bin:${curl}/bin:${gnugrep}/bin"
+
+  SECRET_FILE=$1
+  OUT_DIR=$2
+  STATE_FILE=$3
+
+  AUTH_TOKEN=$(cat "$SECRET_FILE")
+
+  CURL_BODY=$(cat <<EOF
+  {
+    "limit": 30,
+    "sort": {
+      "field": "documentDate",
+      "order": "DESC"
+    },
+    "authToken": "$AUTH_TOKEN"
+  }
+  EOF
+  )
+  CURL_URL="https://secure.hosting.de/api/billing/v1/json/documentsFind"
+  echo "fetching $CURL_URL";
+  documents=$(curl -X POST -H "Content-Type: application/json" -H "Accept: application/json" -d "$CURL_BODY" "$CURL_URL" | jq '.response.data.[].documentId' -rc)
+
+  for doc in $documents; do
+    if [ "$(grep --count "$doc" "$STATE_FILE")" -gt 0 ]; then
+      echo "Skipping already fetched $doc"
+      continue
+    fi
+
+    CURL_BODY=$(cat <<EOF
+    {
+      "id": "$doc",
+      "authToken": "$AUTH_TOKEN"
+    }
+  EOF
+  )
+    CURL_URL="https://secure.hosting.de/api/billing/v1/json/accountingDocumentPdfGet"
+    echo "fetching $doc";
+    url=$(curl -X POST -H "Content-Type: application/json" -H "Accept: application/json" -d "$CURL_BODY" "$CURL_URL" | jq '.response' -rc)
+    curl "$url" >> "$OUT_DIR/$doc.pdf"
+    echo "$doc" >> "$STATE_FILE"
+  done
+''

pkgs/default.nix

@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+{
+  autofetch-hostingde-invoices = pkgs.writeShellApplication {
+    name = "fetch-hostingde-invoices";
+    text = (import ./autofetch-hostingde-invoices.nix pkgs);
+  };
+}

staging/flake.lock

@@ -0,0 +1,463 @@
+{
+  "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": "darwin",
+        "home-manager": "home-manager",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1736955230,
+        "narHash": "sha256-uenf8fv2eG5bKM8C/UvFaiJMZ4IpUFaQxk9OH5t/1gA=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "e600439ec4c273cf11e06fe4d9d906fb98fa097c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
+    "blobs": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1604995301,
+        "narHash": "sha256-wcLzgLec6SGJA8fx1OEN1yV/Py5b+U5iyYpksUY/yLw=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "rev": "2cccdf1ca48316f2cfd1c9a0017e8de5a7156265",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "repo": "blobs",
+        "type": "gitlab"
+      }
+    },
+    "darwin": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1700795494,
+        "narHash": "sha256-gzGLZSiOhf155FW7262kdHo2YDeugp3VuIFb4/GGng0=",
+        "owner": "lnl7",
+        "repo": "nix-darwin",
+        "rev": "4b9b83d5a92e8c1fbfd8eb27eda375908c11ec4d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lnl7",
+        "ref": "master",
+        "repo": "nix-darwin",
+        "type": "github"
+      }
+    },
+    "deploy-rs": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1727447169,
+        "narHash": "sha256-3KyjMPUKHkiWhwR91J1YchF6zb6gvckCAY1jOE+ne0U=",
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "rev": "aa07eb05537d4cd025e2310397a6adcedfe72c76",
+        "type": "github"
+      },
+      "original": {
+        "owner": "serokell",
+        "repo": "deploy-rs",
+        "type": "github"
+      }
+    },
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744145203,
+        "narHash": "sha256-I2oILRiJ6G+BOSjY+0dGrTPe080L3pbKpc+gCV3Nmyk=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "76c0a6dba345490508f36c1aa3c7ba5b6b460989",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1743550720,
+        "narHash": "sha256-hIshGgKZCgWh6AYJpJmRgFdR3WUbkY04o82X05xqQiY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "c621e8422220273271f52058f618c94e405bb0f5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib_2"
+      },
+      "locked": {
+        "lastModified": 1743550720,
+        "narHash": "sha256-hIshGgKZCgWh6AYJpJmRgFdR3WUbkY04o82X05xqQiY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "c621e8422220273271f52058f618c94e405bb0f5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "agenix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1703113217,
+        "narHash": "sha256-7ulcXOk63TIT2lVDSExj7XzFx09LpdSAPtvgtM7yQPE=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "3bfaacf46133c037bb356193bd2f1765d9dc82c1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "home-manager_2": {
+      "inputs": {
+        "nixpkgs": [
+          "momo-cloud",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744117652,
+        "narHash": "sha256-t7dFCDl4vIOOUMhEZnJF15aAzkpaup9x4ZRGToDFYWI=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "b4e98224ad1336751a2ac7493967a4c9f6d9cb3f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-24.11",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "invoiceplane-template": {
+      "inputs": {
+        "flake-parts": [
+          "momo-cloud",
+          "flake-parts"
+        ],
+        "nixpkgs": [
+          "momo-cloud",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1728398621,
+        "narHash": "sha256-cNCgW0g012t7lZ2gxBpc+Uu6GHV2sTEsOV50nSZ96FM=",
+        "ref": "refs/heads/main",
+        "rev": "a4f2aa76583b5dfa3f2db12ff360ba9f229cfb2f",
+        "revCount": 37,
+        "type": "git",
+        "url": "https://git.pub.solar/momo/invoiceplane-templates.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.pub.solar/momo/invoiceplane-templates.git"
+      }
+    },
+    "momo-cloud": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "home-manager": "home-manager_2",
+        "invoiceplane-template": "invoiceplane-template",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-master": "nixpkgs-master",
+        "nixpkgs-nc-spreed-signaling-pr": "nixpkgs-nc-spreed-signaling-pr",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "simple-nixos-mailserver": "simple-nixos-mailserver"
+      },
+      "locked": {
+        "lastModified": 0,
+        "narHash": "sha256-aa6lQvfLkNheqULoJaqLWxfva0q64jnHm28nl6jyDPQ=",
+        "path": "../",
+        "type": "path"
+      },
+      "original": {
+        "path": "../",
+        "type": "path"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744440957,
+        "narHash": "sha256-FHlSkNqFmPxPJvy+6fNLaNeWnF1lZSgqVCl/eWaJRc4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "26d499fc9f1d567283d5d56fcf367edd815dba1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1743296961,
+        "narHash": "sha256-b1EdN3cULCqtorQ4QeWgLMrd5ZGOjLSLemfa00heasc=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "e4822aea2a6d1cdd36653c134cacfd64c97ff4fa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib_2": {
+      "locked": {
+        "lastModified": 1743296961,
+        "narHash": "sha256-b1EdN3cULCqtorQ4QeWgLMrd5ZGOjLSLemfa00heasc=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "e4822aea2a6d1cdd36653c134cacfd64c97ff4fa",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "nixpkgs-master": {
+      "locked": {
+        "lastModified": 1744734272,
+        "narHash": "sha256-P32AWRtc13VZMfSubFKShFHacXRy6od/ILrwmEgkq9c=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "3e5bb71d1ab409b4110a66b8aa340d664892579a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "master",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-nc-spreed-signaling-pr": {
+      "locked": {
+        "lastModified": 1742859343,
+        "narHash": "sha256-20TWYfC3kaDgDwHrk/v1EXCNJ3AshgCdTAuxnza48WQ=",
+        "owner": "hensoko",
+        "repo": "nixpkgs",
+        "rev": "86025a170c7d3b8ac7b467b9501598885b8c8728",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hensoko",
+        "ref": "nextcloud-spreed-signaling",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1744463964,
+        "narHash": "sha256-LWqduOgLHCFxiTNYi3Uj5Lgz0SR+Xhw3kr/3Xd0GPTM=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2631b0b7abcea6e640ce31cd78ea58910d31e650",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744440957,
+        "narHash": "sha256-FHlSkNqFmPxPJvy+6fNLaNeWnF1lZSgqVCl/eWaJRc4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "26d499fc9f1d567283d5d56fcf367edd815dba1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "agenix": "agenix",
+        "deploy-rs": "deploy-rs",
+        "disko": "disko",
+        "flake-parts": "flake-parts",
+        "momo-cloud": "momo-cloud",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "simple-nixos-mailserver": {
+      "inputs": {
+        "blobs": "blobs",
+        "flake-compat": "flake-compat_2",
+        "nixpkgs": [
+          "momo-cloud",
+          "nixpkgs-unstable"
+        ],
+        "nixpkgs-24_11": [
+          "momo-cloud",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1734884447,
+        "narHash": "sha256-HA9fAmGNGf0cOYrhgoa+B6BxNVqGAYXfLyx8zIS0ZBY=",
+        "owner": "simple-nixos-mailserver",
+        "repo": "nixos-mailserver",
+        "rev": "63209b1def2c9fc891ad271f474a3464a5833294",
+        "type": "gitlab"
+      },
+      "original": {
+        "owner": "simple-nixos-mailserver",
+        "ref": "nixos-24.11",
+        "repo": "nixos-mailserver",
+        "type": "gitlab"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1701680307,
+        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

staging/flake.nix

@@ -0,0 +1,98 @@
+{
+  inputs = {
+    # Track channels with commits tested and built by hydra
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+
+    flake-parts.url = "github:hercules-ci/flake-parts";
+
+    deploy-rs.url = "github:serokell/deploy-rs";
+    deploy-rs.inputs.nixpkgs.follows = "nixpkgs";
+
+    disko.url = "github:nix-community/disko";
+    disko.inputs.nixpkgs.follows = "nixpkgs";
+
+    agenix.url = "github:ryantm/agenix";
+    agenix.inputs.nixpkgs.follows = "nixpkgs";
+
+    momo-cloud.url = "path:../";
+  };
+
+  outputs =
+    inputs@{ self, ... }:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+
+      imports = [
+        inputs.flake-parts.flakeModules.easyOverlay
+        ./logins
+        ./lib
+        ./hosts
+      ];
+
+      perSystem =
+        args@{
+          system,
+          pkgs,
+          config,
+          lib,
+          ...
+        }:
+        {
+          _module.args = {
+            inherit inputs;
+            pkgs = import inputs.nixpkgs {
+              inherit system;
+              overlays = [
+                inputs.agenix.overlays.default
+                inputs.momo-cloud.overlays.default
+              ];
+            };
+            unstable = import inputs.nixpkgs-unstable { inherit system; };
+          };
+
+          checks =
+            let
+              machinesPerSystem = {
+                aarch64-linux = [ ];
+                x86_64-linux = [
+                  "miom-1"
+                ];
+              };
+              nixosMachines = inputs.nixpkgs.lib.mapAttrs' (n: inputs.nixpkgs.lib.nameValuePair "nixos-${n}") (
+                inputs.nixpkgs.lib.genAttrs (machinesPerSystem.${system} or [ ]) (
+                  name: self.nixosConfigurations.${name}.config.system.build.toplevel
+                )
+              );
+            in nixosMachines;
+
+          devShells.default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              deploy-rs
+              agenix
+              age-plugin-yubikey
+              opentofu
+              terraform-ls
+            ];
+          };
+
+          devShells.ci = pkgs.mkShell { buildInputs = with pkgs; [ nodejs_22 ]; };
+        };
+
+      flake = {
+        checks = builtins.mapAttrs (
+          system: deployLib: deployLib.deployChecks self.deploy
+        ) inputs.deploy-rs.lib;
+
+        formatter."x86_64-linux" = inputs.nixpkgs.legacyPackages."x86_64-linux".nixfmt-rfc-style;
+
+        deploy.nodes = self.lib.deploy.mkDeployNodes self.nixosConfigurations {
+          cassiopeia = {
+            hostname = "cassiopeia.staging.momo.koeln";
+          };
+        };
+      };
+    };
+}

staging/hosts/_template/configuration.nix

@@ -0,0 +1,21 @@
+{ config, lib, ... }:
+{
+  boot.kernelParams = [ "ip=dhcp" ];
+  boot.loader = {
+    grub.enable = false;
+    systemd-boot.enable = true;
+  };
+
+  networking = {
+    useDHCP = false;
+    interfaces.enp3s0 = {
+      useDHCP = true;
+    };
+  };
+
+  services.openssh.openFirewall = true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+  system.stateVersion = "24.11";
+}

staging/hosts/_template/default.nix

@@ -0,0 +1,9 @@
+{ modulesPath, ... }:
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+
+    ./configuration.nix
+    ./disko-config.nix
+  ];
+}

staging/hosts/_template/disko-config.nix

@@ -0,0 +1,65 @@
+{ ... }:
+{
+  disko.devices = {
+    disk.main = {
+      device = "/dev/sda";
+      type = "disk";
+      content = {
+        type = "gpt";
+        partitions = {
+          esp = {
+            name = "ESP";
+            size = "500M";
+            type = "EF00";
+            content = {
+              type = "filesystem";
+              format = "vfat";
+              mountOptions = [ "umask=0077" ];
+              mountpoint = "/boot";
+            };
+          };
+          luks = {
+            name = "luks";
+            size = "100%";
+            content = {
+              type = "luks";
+              name = "cryptroot";
+              settings = {
+                allowDiscards = true;
+              };
+              content = {
+                type = "lvm_pv";
+                vg = "vg0";
+              };
+            };
+          };
+        };
+      };
+    };
+    lvm_vg = {
+      vg0 = {
+        type = "lvm_vg";
+        lvs = {
+          swap = {
+            size = "8192M";
+            content = {
+              type = "swap";
+            };
+          };
+          root = {
+            size = "80%FREE";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+              mountOptions = [
+                "defaults"
+                "discard"
+              ];
+            };
+          };
+        };
+      };
+    };
+  };
+}

staging/hosts/cassiopeia/acme.nix

@@ -0,0 +1,18 @@
+{
+  flake,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  age.secrets."hostingde-acme-secrets" = {
+    file = "${flake.self}/secrets/momo/hostingde-acme-secrets.age";
+    mode = "400";
+    owner = "acme";
+  };
+
+  momo-cloud.acme = {
+    credentialsFile = config.age.secrets."hostingde-acme-secrets".path;
+  };
+}

staging/hosts/cassiopeia/configuration.nix

@@ -0,0 +1,45 @@
+{ config, lib, ... }:
+{
+  momo-cloud.unlock-luks-on-boot.enable = true;
+  momo-cloud.networking.domain = "staging.momo.koeln";
+
+  boot.kernelParams = [ "ip=dhcp" ];
+  boot.loader = {
+    grub.enable = false;
+    systemd-boot.enable = true;
+  };
+
+  networking = {
+    hostName = "cassiopeia";
+    useDHCP = false;
+    enableIPv6 = true;
+
+    interfaces.enp3s0 = {
+      ipv4.addresses = [
+        {
+          address = "80.244.242.6";
+          prefixLength = 29;
+        }
+      ];
+      ipv6.addresses = [
+        {
+          address = "2001:4d88:1ffa:26::6";
+          prefixLength = 64;
+        }
+      ];
+    };
+
+    defaultGateway = "80.244.242.1";
+    defaultGateway6 = "2001:4d88:1ffa:26::1";
+    nameservers = [
+      "95.129.51.51"
+      "80.244.244.244"
+    ];
+  };
+
+  services.openssh.openFirewall = true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+  system.stateVersion = "24.05";
+}

staging/hosts/cassiopeia/default.nix

@@ -0,0 +1,19 @@
+{ modulesPath, ... }:
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+
+    ./configuration.nix
+    ./disko-config.nix
+    ./wireguard.nix
+
+    ./smtp-settings.nix
+
+    ./acme.nix
+    ./kanidm.nix
+    ./monitoring.nix
+    ./nextcloud.nix
+    ./nextcloud-signaling.nix
+    ./paperless.nix
+  ];
+}

staging/hosts/cassiopeia/disko-config.nix

@@ -0,0 +1,65 @@
+{ ... }:
+{
+  disko.devices = {
+    disk.main = {
+      device = "/dev/sda";
+      type = "disk";
+      content = {
+        type = "gpt";
+        partitions = {
+          esp = {
+            name = "ESP";
+            size = "500M";
+            type = "EF00";
+            content = {
+              type = "filesystem";
+              format = "vfat";
+              mountOptions = [ "umask=0077" ];
+              mountpoint = "/boot";
+            };
+          };
+          luks = {
+            name = "luks";
+            size = "100%";
+            content = {
+              type = "luks";
+              name = "cryptroot";
+              settings = {
+                allowDiscards = true;
+              };
+              content = {
+                type = "lvm_pv";
+                vg = "vg0";
+              };
+            };
+          };
+        };
+      };
+    };
+    lvm_vg = {
+      vg0 = {
+        type = "lvm_vg";
+        lvs = {
+          swap = {
+            size = "8192M";
+            content = {
+              type = "swap";
+            };
+          };
+          root = {
+            size = "80%FREE";
+            content = {
+              type = "filesystem";
+              format = "ext4";
+              mountpoint = "/";
+              mountOptions = [
+                "defaults"
+                "discard"
+              ];
+            };
+          };
+        };
+      };
+    };
+  };
+}

staging/hosts/cassiopeia/kanidm.nix

@@ -0,0 +1,25 @@
+{
+  flake,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  age.secrets."kanidm-admin-password" = {
+    file = "${flake.self}/secrets/staging/kanidm-admin-password.age";
+    mode = "400";
+    owner = "kanidm";
+  };
+  age.secrets."kanidm-idm-admin-password" = {
+    file = "${flake.self}/secrets/staging/kanidm-idm-admin-password.age";
+    mode = "400";
+    owner = "kanidm";
+  };
+
+  momo-cloud.authentication = {
+    enable = true;
+    adminPasswordFile = config.age.secrets."kanidm-admin-password".path;
+    idmAdminPasswordFile = config.age.secrets."kanidm-idm-admin-password".path;
+  };
+}

staging/hosts/cassiopeia/monitoring.nix

@@ -0,0 +1,38 @@
+{
+  flake,
+  config,
+  ...
+}:
+{
+  age.secrets.alloy-basic-auth-password = {
+    file = "${flake.self}/secrets/staging/alloy-basic-auth-password.age";
+    path = "/etc/alloy/secrets.alloy";
+    symlink = false;
+    mode = "400";
+  };
+
+  momo-cloud.monitoring-client = {
+    enable = true;
+    basicAuthPasswordFile = config.age.secrets."alloy-basic-auth-password".path;
+  };
+
+  age.secrets.grafana-oidc-secret = {
+    file = "${flake.self}/secrets/staging/grafana-oidc-secret.age";
+    owner = "grafana";
+    group = "kanidm";
+    mode = "440";
+  };
+
+  age.secrets.grafana-admin-password = {
+    file = "${flake.self}/secrets/staging/grafana-admin-password.age";
+    owner = "grafana";
+    mode = "400";
+  };
+
+  momo-cloud.monitoring-server = {
+    enable = true;
+    loki.basicAuth = "loki:$2y$05$xpbTP5qcRwq4nPG6u9wdZOMvzHznBTZxRPMy/DjUbOwsyj66owxHG";
+    grafana.oidcSecretFile = config.age.secrets."grafana-oidc-secret".path;
+    grafana.adminPasswordFile = config.age.secrets."grafana-admin-password".path;
+  };
+}

staging/hosts/cassiopeia/nextcloud-signaling.nix

@@ -0,0 +1,61 @@
+{ config, flake, ... }:
+
+{
+  age.secrets."signaling-nextcloud-secret" = {
+    file = "${flake.self}/secrets/staging/signaling-nextcloud-secret.age";
+    mode = "400";
+    owner = "turnserver";
+    group = "nextcloud";
+  };
+
+  age.secrets."signaling-internal-secret" = {
+    file = "${flake.self}/secrets/staging/signaling-internal-secret.age";
+    mode = "400";
+    owner = "turnserver";
+  };
+
+  age.secrets."janus-api-key" = {
+    file = "${flake.self}/secrets/staging/janus-api-key.age";
+    mode = "400";
+    owner = "janus";
+    group = "turnserver";
+  };
+
+  age.secrets."signaling-block-key" = {
+    file = "${flake.self}/secrets/staging/signaling-block-key.age";
+    mode = "400";
+    owner = "turnserver";
+  };
+
+  age.secrets."signaling-hash-key" = {
+    file = "${flake.self}/secrets/staging/signaling-hash-key.age";
+    mode = "400";
+    owner = "turnserver";
+  };
+
+  age.secrets."coturn-static-auth-secret" = {
+    file = "${flake.self}/secrets/staging/coturn_static_auth_secret.age";
+    mode = "400";
+    owner = "turnserver";
+    group = "nextcloud";
+  };
+
+  momo-cloud.nextcloud-signaling = {
+    enable = true;
+    internalSecretFile = config.age.secrets."signaling-internal-secret".path;
+    hashKeyFile = config.age.secrets."signaling-hash-key".path;
+    blockKeyFile = config.age.secrets."signaling-block-key".path;
+    janusApiKeyFile = config.age.secrets."janus-api-key".path;
+    turnSecretFile = config.age.secrets."coturn-static-auth-secret".path;
+    nextcloudSecretFile = config.age.secrets."signaling-nextcloud-secret".path;
+  };
+  momo-cloud.coturn.staticAuthSecretFile = config.age.secrets."coturn-static-auth-secret".path;
+
+  momo-cloud.nextcloud.talk = {
+    enable = true;
+    coturnStaticAuthSecretFile = config.age.secrets."coturn-static-auth-secret".path;
+    signalingSecretFile = config.age.secrets."signaling-nextcloud-secret".path;
+  };
+
+  momo-cloud.coturn.interface = "enp3s0";
+}

staging/hosts/cassiopeia/nextcloud.nix

@@ -0,0 +1,34 @@
+{
+  flake,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+{
+  age.secrets."nextcloud-secrets" = {
+    file = "${flake.self}/secrets/staging/nextcloud-secrets.age";
+    mode = "400";
+    owner = "nextcloud";
+  };
+
+  age.secrets."nextcloud-admin-pass" = {
+    file = "${flake.self}/secrets/staging/nextcloud-admin-pass.age";
+    mode = "400";
+    owner = "nextcloud";
+  };
+
+  age.secrets."nextcloud-oidc-secret" = {
+    file = "${flake.self}/secrets/staging/nextcloud-oidc-secret.age";
+    mode = "440";
+    owner = "nextcloud";
+    group = "kanidm";
+  };
+
+  momo-cloud.nextcloud = {
+    enable = true;
+    adminPasswordFile = config.age.secrets."nextcloud-admin-pass".path;
+    secretsFile = config.age.secrets."nextcloud-secrets".path;
+    oidcSecretFile = config.age.secrets."nextcloud-oidc-secret".path;
+  };
+}

staging/hosts/cassiopeia/paperless.nix

@@ -0,0 +1,34 @@
+{
+  flake,
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  age.secrets."paperless.env" = {
+    file = "${flake.self}/secrets/staging/paperless.env.age";
+    mode = "400";
+    owner = "paperless";
+  };
+
+  age.secrets."kanidm-paperless-secret" = {
+    file = "${flake.self}/secrets/staging/kanidm-paperless-secret.age";
+    mode = "400";
+    owner = "kanidm";
+  };
+
+  age.secrets."paperless-superuser-password" = {
+    file = "${flake.self}/secrets/staging/paperless-superuser-password.age";
+    mode = "400";
+    owner = "kanidm";
+  };
+
+  momo-cloud.paperless = {
+    enable = true;
+    setup = false;
+    envFile = config.age.secrets."paperless.env".path;
+    oidcSecretFile = config.age.secrets."kanidm-paperless-secret".path;
+    superuserPasswordFile = config.age.secrets."paperless-superuser-password".path;
+  };
+}

staging/hosts/cassiopeia/smtp-settings.nix

@@ -0,0 +1,15 @@
+{ flake, config, ... }:
+
+{
+  age.secrets."email-smtp-password" = {
+    file = "${flake.self}/secrets/staging/email-smtp-password.age";
+    owner = "grafana";
+  };
+
+  momo-cloud.email-smtp = {
+    host = "mail.momo.koeln";
+    port = "465";
+    username = "admins@momo.koeln"; # TODO SECURITY: do use separate staging email account
+    passwordFile = config.age.secrets."email-smtp-password".path;
+  };
+}

staging/hosts/cassiopeia/wireguard.nix

@@ -0,0 +1,20 @@
+{
+  config,
+  flake,
+  ...
+}:
+let
+  wireguardIPv4 = "10.30.31.1";
+  wireguardIPv6 = "fd00:3031:3031:3031:3031:1::";
+in
+{
+  age.secrets.wg-private-key.file = "${flake.self}/secrets/staging/cassiopeia-wg-private-key.age";
+
+  momo-cloud.wireguard = {
+    enable = true;
+    openFirewall = true;
+    privateKeyFile = config.age.secrets.wg-private-key.path;
+    ipv4.address = wireguardIPv4;
+    ipv6.address = wireguardIPv6;
+  };
+}