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Merge pull request 'auth: add user for each administrator' (#261) from per-admin-user into main

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Reviewed-on: pub-solar/infra#261
Reviewed-by: teutat3s <teutat3s@noreply.git.pub.solar>
Reviewed-by: Akshay Mankar <axeman@noreply.git.pub.solar>
This commit is contained in:
teutat3s 2024-11-28 16:16:35 +00:00
parent 6a0b9e7e88 aee317b463
commit 3e32bfe106
Signed by: pub.solar gitea
GPG key ID: F0332B04B7054873
19 changed files with 153 additions and 139 deletions
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6
docs/administrative-access.md
View file

@ -28,18 +28,18 @@ People with admin access to the infrastructure are added to [`logins/admins.nix`
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. The pub.solar wireguard network is spaced under `10.7.6.0/24` and `fd00:fae:fae:fae:fae::/80`. 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: `10.7.6.<ip-address>/32` `fd00:fae:fae:fae:fae:<ip-address>::/96`. For more information on how to generate keypairs, see [the NixOS Wireguard docs](https://nixos.wiki/wiki/WireGuard#Generate_keypair).
2. **Wireguard device**: each wireguard device has two parts: the public key and the IP addresses it should have in the wireguard network. The pub.solar wireguard network uses the subnets `10.7.6.0/24` and `fd00:fae:fae:fae:fae::/80`. 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: `10.7.6.<ip-address>/32` `fd00:fae:fae:fae:fae:<ip-address>::/96`. For more information on how to generate keypairs, see [the NixOS Wireguard docs](https://nixos.wiki/wiki/WireGuard#Generate_keypair).
One can access our hosts using this domain scheme:
```
ssh barkeeper@<hostname>.wg.pub.solar
ssh <unix-username>@<hostname>.wg.pub.solar
```
So, for example for `nachtigall`:
```
ssh barkeeper@nachtigall.wg.pub.solar
ssh teutat3s@nachtigall.wg.pub.solar
```
Example NixOS snippet for WireGuard client config

20
docs/deploying.md
View file

@ -7,16 +7,29 @@ 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:
### Dry-run
Use `--dry-activate` to show a diff of updated packages and all services that
would be restarted by the update. This will also put all files in place without
switching to the new generation, enabling a quick switch to the new config at a
later moment.
For nachtigall.pub.solar:
```
deploy --targets '.#nachtigall' --magic-rollback false --auto-rollback false --keep-result --result-path ./results
deploy --targets '.#nachtigall' --ssh-user <unix-username> --magic-rollback false --auto-rollback false --keep-result --result-path ./results --dry-activate
```
After reviewing the changes, apply the update with:
```
deploy --targets '.#nachtigall' --ssh-user <unix-username> --magic-rollback false --auto-rollback false --keep-result --result-path ./results
```
For metronom.pub.solar (aarch64-linux):
```
deploy --targets '.#metronom' --magic-rollback false --auto-rollback false --keep-result --result-path ./results --remote-build
deploy --targets '.#metronom' --ssh-user <unix-username> --magic-rollback false --auto-rollback false --keep-result --result-path ./results --remote-build
```
Usually we skip all rollback functionality, but if you want to deploy a change
@ -25,9 +38,6 @@ 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

4
docs/garage.md
View file

@ -8,7 +8,7 @@ Requirements:
- [Setup WireGuard](./administrative-access.md#ssh-access) for hosts: `trinkgenossin`, optionally: `delite`, `blue-shell`
```
ssh barkeeper@trinkgenossin.wg.pub.solar
ssh <unix-username>@trinkgenossin.wg.pub.solar
```
```
@ -58,7 +58,7 @@ Further reading:
### Notes on manual setup steps
```
ssh barkeeper@trinkgenossin.wg.pub.solar
ssh <unix-username>@trinkgenossin.wg.pub.solar
# Add a few spaces to avoid leaking the secret to the shell history
export GARAGE_RPC_SECRET=<secret-in-keepass>

4
docs/nix-flake-updates.md
View file

@ -41,3 +41,7 @@ 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
```
### Deploying updates
See [deploying.md](./deploying.md).

15
flake.nix
View file

@ -120,13 +120,7 @@
devShells.ci = pkgs.mkShell { buildInputs = with pkgs; [ nodejs ]; };
};
flake =
let
username = "barkeeper";
in
{
inherit username;
flake = {
nixosModules = builtins.listToAttrs (
map (x: {
name = x;
@ -143,31 +137,24 @@
deploy.nodes = self.lib.deploy.mkDeployNodes self.nixosConfigurations {
nachtigall = {
hostname = "nachtigall.wg.pub.solar";
sshUser = username;
};
metronom = {
hostname = "metronom.wg.pub.solar";
sshUser = username;
};
tankstelle = {
hostname = "tankstelle.wg.pub.solar";
sshUser = username;
};
underground = {
hostname = "80.244.242.3";
sshUser = username;
};
trinkgenossin = {
hostname = "trinkgenossin.wg.pub.solar";
sshUser = username;
};
delite = {
hostname = "delite.wg.pub.solar";
sshUser = username;
};
blue-shell = {
hostname = "blue-shell.wg.pub.solar";
sshUser = username;
};
};
};

2
hosts/blue-shell/wireguard.nix
View file

@ -22,7 +22,7 @@ in
"${wireguardIPv6}/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# trinkgenossin.pub.solar
publicKey = "QWgHovHxtqiQhnHLouSWiT6GIoQDmuvnThYL5c/rvU4=";

2
hosts/delite/wireguard.nix
View file

@ -22,7 +22,7 @@ in
"${wireguardIPv6}/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# trinkgenossin.pub.solar
publicKey = "QWgHovHxtqiQhnHLouSWiT6GIoQDmuvnThYL5c/rvU4=";

2
hosts/metronom/wireguard.nix
View file

@ -18,7 +18,7 @@
"fd00:fae:fae:fae:fae:3::/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# nachtigall.pub.solar
endpoint = "138.201.80.102:51820";

2
hosts/nachtigall/wireguard.nix
View file

@ -18,7 +18,7 @@
"fd00:fae:fae:fae:fae:1::/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# tankstelle.pub.solar
endpoint = "80.244.242.5:51820";

2
hosts/tankstelle/wireguard.nix
View file

@ -18,7 +18,7 @@
"fd00:fae:fae:fae:fae:4::/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# nachtigall.pub.solar
endpoint = "138.201.80.102:51820";

2
hosts/trinkgenossin/wireguard.nix
View file

@ -22,7 +22,7 @@ in
"${wireguardIPv6}/96"
];
privateKeyFile = config.age.secrets.wg-private-key.path;
peers = flake.self.logins.admins.wireguardDevices ++ [
peers = flake.self.logins.wireguardDevices ++ [
{
# nachtigall.pub.solar
endpoint = "138.201.80.102:51820";

23
logins/default.nix
View file

@ -6,19 +6,16 @@ in
{
flake = {
logins = {
admins =
lib.lists.foldl
(logins: adminConfig: {
sshPubKeys = logins.sshPubKeys ++ (lib.attrsets.attrValues adminConfig.sshPubKeys);
wireguardDevices =
logins.wireguardDevices
++ (if adminConfig ? "wireguardDevices" then adminConfig.wireguardDevices else [ ]);
})
{
sshPubKeys = [ ];
wireguardDevices = [ ];
}
(lib.attrsets.attrValues admins);
admins = admins;
wireguardDevices = lib.lists.foldl (
wireguardDevices: adminConfig:
wireguardDevices ++ (if adminConfig ? "wireguardDevices" then adminConfig.wireguardDevices else [ ])
) [ ] (lib.attrsets.attrValues admins);
sshPubKeys = lib.lists.foldl (
sshPubKeys: adminConfig:
sshPubKeys
++ (if adminConfig ? "sshPubKeys" then lib.attrsets.attrValues adminConfig.sshPubKeys else [ ])
) [ ] (lib.attrsets.attrValues admins);
robots.sshPubKeys = lib.attrsets.attrValues robots;
};
};

4
modules/core/default.nix
View file

@ -54,9 +54,5 @@
};
time.timeZone = "Etc/UTC";
home-manager.users.${config.pub-solar-os.authentication.username} = {
home.stateVersion = "23.05";
};
};
}

12
modules/core/terminal-tooling.nix
View file

@ -1,6 +1,11 @@
{ flake, config, ... }:
{ flake, lib, ... }:
{
home-manager.users.${config.pub-solar-os.authentication.username} = {
home-manager.users = (
lib.attrsets.foldlAttrs (
acc: name: value:
acc
// {
${name} = {
programs.git.enable = true;
programs.starship.enable = true;
programs.bash.enable = true;
@ -17,3 +22,6 @@
};
};
}
) { } flake.self.logins.admins
);
}

58
modules/core/users.nix
View file

@ -11,18 +11,6 @@
inherit (lib) mkOption types;
in
{
username = mkOption {
description = "Username for the adminstrative user";
type = types.str;
default = flake.self.username;
};
sshPubKeys = mkOption {
description = "SSH Keys that should have administrative root access";
type = types.listOf types.str;
default = flake.self.logins.admins.sshPubKeys;
};
root.initialHashedPassword = mkOption {
description = "Hashed password of the root account";
type = types.str;
@ -43,22 +31,29 @@
};
config = {
users.users.${config.pub-solar-os.authentication.username} = {
name = config.pub-solar-os.authentication.username;
group = config.pub-solar-os.authentication.username;
users.users =
(lib.attrsets.foldlAttrs (
acc: name: value:
acc
// {
${name} = {
name = name;
group = name;
extraGroups = [
"wheel"
"docker"
];
isNormalUser = true;
openssh.authorizedKeys.keys = config.pub-solar-os.authentication.sshPubKeys;
openssh.authorizedKeys.keys = lib.attrsets.attrValues value.sshPubKeys;
};
users.groups.${config.pub-solar-os.authentication.username} = { };
}
) { } flake.self.logins.admins)
// {
# TODO: Remove when we stop locking ourselves out.
users.users.root.openssh.authorizedKeys.keys = config.pub-solar-os.authentication.sshPubKeys;
root.openssh.authorizedKeys.keys = flake.self.logins.sshPubKeys;
root.initialHashedPassword = config.pub-solar-os.authentication.root.initialHashedPassword;
users.users.${config.pub-solar-os.authentication.robot.username} = {
${config.pub-solar-os.authentication.robot.username} = {
description = "CI and automation user";
home = "/home/${config.pub-solar-os.authentication.robot.username}";
createHome = true;
@ -68,11 +63,28 @@
isSystemUser = true;
openssh.authorizedKeys.keys = config.pub-solar-os.authentication.robot.sshPubKeys;
};
};
users.groups.${config.pub-solar-os.authentication.robot.username} = { };
home-manager.users = (
lib.attrsets.foldlAttrs (
acc: name: value:
acc
// {
${name} = {
home.stateVersion = "23.05";
};
}
) { } flake.self.logins.admins
);
users.users.root.initialHashedPassword =
config.pub-solar-os.authentication.root.initialHashedPassword;
users.groups =
(lib.attrsets.foldlAttrs (
acc: name: value:
acc // { "${name}" = { }; }
) { } flake.self.logins.admins)
// {
${config.pub-solar-os.authentication.robot.username} = { };
};
security.sudo.wheelNeedsPassword = false;
};

2
modules/unlock-luks-on-boot/default.nix
View file

@ -10,7 +10,7 @@
# Please create this manually the first time.
hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
authorizedKeys = config.pub-solar-os.authentication.sshPubKeys;
authorizedKeys = flake.self.logins.sshPubKeys;
};
postCommands = ''
# Automatically ask for the password on SSH login

2
modules/unlock-zfs-on-boot/default.nix
View file

@ -11,7 +11,7 @@
# Please create this manually the first time.
hostKeys = [ "/etc/secrets/initrd/ssh_host_ed25519_key" ];
authorizedKeys = config.pub-solar-os.authentication.sshPubKeys;
authorizedKeys = flake.self.logins.sshPubKeys;
};
# this will automatically load the zfs password prompt on login
# and kill the other prompt so boot can continue

2
tests/keycloak.nix
View file

@ -66,7 +66,7 @@ in
testScript =
{ nodes, ... }:
let
user = nodes.client.users.users.${nodes.client.pub-solar-os.authentication.username};
user = nodes.client.users.users.b12f;
#uid = toString user.uid;
bus = "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u ${user.name})/bus";
gdbus = "${bus} gdbus";

2
tests/support/client.nix
View file

@ -11,7 +11,7 @@
services.xserver.displayManager.gdm.enable = true;
services.xserver.desktopManager.gnome.enable = true;
services.xserver.displayManager.autoLogin.enable = true;
services.xserver.displayManager.autoLogin.user = config.pub-solar-os.authentication.username;
services.xserver.displayManager.autoLogin.user = "b12f";
systemd.user.services = {
"org.gnome.Shell@wayland" = {