infrastructure-documentation/README.md

The resources used by the infrastructure are in the https://code.forgejo.org/infrastructure/ organization.
There is a [dedicated chatroom](https://matrix.to/#/#forgejo-ci:matrix.org). A mirror of this repository is available at https://git.pub.solar/forgejo/infrastructure-documentation.

## Table of content

- Setting up a new [K8S/DRBD/NFS k8s node](k8s.md)
- Maintenance and disaster recovery of a [K8S/DRBD/NFS k8s node](k8s-maintenance.md)
- Setting up a new [LXC/DRBD Host](lxc.md)
- Managing services with a [LXC/DRBD/nginx stack](drbd-nginx-lxc.md)
- Installing a [Forgejo instance in the K8S cluster](k8s-forgejo.md)
- Installing a [Forgejo runner in an LXC container](runner-lxc.md)
- Managing the [Octopuce host](octopuce.md)

## hetzner{01,04}

https://hetzner{01,04}.forgejo.org run on [EX101](https://www.hetzner.com/dedicated-rootserver/ex101) Hetzner hardware.

### LXC

```sh
lxc-helpers.sh lxc_install_lxc_inside 10.41.13 fc29
```

### Disk partitioning

- First disk
  - OS
  - a partition mounted on /srv where non precious data goes such as the LXC containers with runners.
- Second disk
  - configured with DRBD for precious data.

### Root filesystem backups

- `hetzner01:/etc/cron.daily/backup-hetzner04`
  `rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /precious --exclude /srv --exclude /var/lib/lxc 10.53.100.4:/ /srv/backups/hetzner04/ >& /var/log/$(basename $0).log`
- `hetzner04:/etc/cron.daily/backup-hetzner01`
  `rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /precious --exclude /srv --exclude /var/lib/lxc 10.53.100.1:/ /srv/backups/hetzner01/ >& /var/log/$(basename $0).log`

### LXC containers

- `runner-lxc-helpers` (hetzner01)

  Dedicated to Forgejo runners for the https://code.forgejo.org/forgejo/lxc-helpers project.

  - K8S enabled
  - code.forgejo.org/forgejo/lxc-helpers/config\*.yml

- `forgejo-runners` (hetzner01)

  Dedicated to Forgejo runners for the https://codeberg.org/forgejo organization.

  - Docker enabled
  - codeberg.org/forgejo/config\*.yml

- `runner01-lxc` (hetzner01)

  Dedicated to Forgejo runners for https://code.forgejo.org.

  - Docker and LXC enabled 10.194.201 fc35
  - code.forgejo.org/forgejo/config\*.yml
  - code.forgejo.org/actions/config\*.yml
  - code.forgejo.org/forgejo-integration/config\*.yml
  - code.forgejo.org/forgejo-contrib/config\*.yml
  - code.forgejo.org/f3/config\*.yml
  - code.forgejo.org/forgefriends/config\*.yml

- `forgejo-v9` (hetzner04) same as `forgejo-v8`
- `forgejo-v8` (hetzner04)

  Dedicated to https://v8.next.forgejo.org, see https://code.forgejo.org/infrastructure/k8s

  - K8S enabled
  - K8S wakeup-on-logs script /etc/wakeup-on-logs/forgejo-v8
  - [Values file](https://code.forgejo.org/infrastructure/k8s/src/branch/main/forgejo-v8/values.yml)
  - nginx forwarding of SSH streams in `/etc/nginx/modules-enabled/next.forgejo.org.conf`

    ```
    stream {

      # v8 ip's
      upstream v8 {
        least_conn;
        server 10.41.13.27:2222;
      }

      # v8 definition
      server {
        listen 2080; # the port to listen on this server
        listen [::]:2080;
        proxy_pass v8; # forward traffic to this upstream group
      }
    }
    ```

- `forgefriends-forum` (hetzner04)

  Dedicated to https://forum.forgefriends.org

  - Docker enabled

- `forgefriends-gitlab` (hetzner04)

  Dedicated to https://lab.forgefriends.org

  - Docker enabled

- `forgefriends-cloud` (hetzner04)

  Dedicated to https://cloud.forgefriends.org

  - Docker enabled

- `gna-forgejo` (hetzner04)

  Dedicated to https://forgejo.gna.org

  - Docker enabled

- `gna-forum` (hetzner04)

  Dedicated to https://forum.gna.org

  - Docker enabled

## hetzner{02,03}

https://hetzner02.forgejo.org & https://hetzner03.forgejo.org run on [EX44](https://www.hetzner.com/dedicated-rootserver/ex44) Hetzner hardware.

### LXC

```sh
lxc-helpers.sh lxc_install_lxc_inside 10.6.83 fc16
```

### Disk partitioning

- First disk
  - OS
  - a partition configured with DRBD for precious data mounted on /var/lib/lxc
- Second disk
  - non precious data such as the LXC containers with runners.

### Root filesystem backups

- `hetzner03:/etc/cron.daily/backup-hetzner02`
  `rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /srv --exclude /var/lib/lxc 10.53.100.2:/ /srv/backups/hetzner02/`
- `hetzner02:/etc/cron.daily/backup-hetzner03`
  `rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /srv --exclude /var/lib/lxc 10.53.100.3:/ /srv/backups/hetzner03/`

### Public IP addresses

The public IP addresses attached to the hosts are not failover IPs that can be moved from one host to the next.
The DNS entry needs to be updated if the primary hosts changes.

When additional IP addresses are attached to the server, they are added to `/etc/network/interfaces` like
ipv4 65.21.67.71 and ipv6 2a01:4f9:3081:51ec::102 below.

```
auto enp5s0
iface enp5s0 inet static
  address 65.21.67.73
  netmask 255.255.255.192
  gateway 65.21.67.65
  # route 65.21.67.64/26 via 65.21.67.65
  up route add -net 65.21.67.64 netmask 255.255.255.192 gw 65.21.67.65 dev enp5s0
  # BEGIN code.forgejo.org
  up ip addr add 65.21.67.71/32 dev enp5s0
  up nft -f /home/debian/code.nftables
  down ip addr del 65.21.67.71/32 dev enp5s0
  # END code.forgejo.org

iface enp5s0 inet6 static
  address 2a01:4f9:3081:51ec::2
  netmask 64
  gateway fe80::1
  # BEGIN code.forgejo.org
  up ip -6 addr add 2a01:4f9:3081:51ec::102/64 dev enp5s0
  down ip -6 addr del 2a01:4f9:3081:51ec::102/64 dev enp5s0
  # END code.forgejo.org
```
For port forwarding to work, the LXC host must not bind them. For instance the ssh server configuration at `/etc/ssh/sshd_config` should not bind all IP but only a specific one.

```
Port 22
AddressFamily inet
ListenAddress 65.21.67.73
#ListenAddress ::
```

### Port forwarding

Forwarding a port to an LXC container can be done with [nginx streeam](https://nginx.org/en/docs/stream/ngx_stream_core_module.html) for the public IP of code.forgejo.org (65.21.67.71 & 2a01:4f9:3081:51ec::102) to the private IP (10.6.83.195) of the `code` LXC container in `/etc/nginx/modules-enabled/ssh.conf`:

```
stream {

  # code.forgejo.org ip's
  upstream codessh {
    least_conn;
    server 10.6.83.195:22;
  }

  # code.forgejo.org definition
  server {
    listen 65.21.67.71:22; # the port to listen on this server
    listen [2a01:4f9:3081:51ec::102]:22;
    proxy_pass codessh; # forward traffic to this upstream group
    proxy_timeout 3s;
    proxy_connect_timeout 3s;
  }
}
```

### 302 redirects

- On hetzner02
  - try.next.forgejo.org redirects to v(latest stable).next.forgejo.org
  - dev.next.forgejo.org redirects to v(latest dev).next.forgejo.org

### Containers

- `forgejo-code` on hetzner02

  Dedicated to https://code.forgejo.org

  - Docker enabled
  - upgrades checklist:
    - `ssh -t debian@hetzner02.forgejo.org lxc-helpers.sh lxc_container_run forgejo-code -- sudo --user debian bash`
      ```sh
      emacs /home/debian/run-forgejo.sh # change the `image=`
      docker stop forgejo
      ```
    - `ssh -t debian@hetzner02.forgejo.org sudo /etc/cron.daily/backup-forgejo-code`
    - `ssh -t debian@hetzner02.forgejo.org lxc-helpers.sh lxc_container_run forgejo-code -- sudo --user debian bash`
      ```sh
      docker rm forgejo
      bash -x /home/debian/run-forgejo.sh
      docker logs -n 200 -f forgejo
      ```
  - Rotating 30 days backups happen daily `/etc/cron.daily/forgejo-code-backup.sh`
  - Add code.forgejo.org to the forgejo.org SPF record

- `forgejo-next` on hetzner02

  Dedicated to https://next.forgejo.org

  - Docker enabled
  - `/etc/cron.hourly/forgejo-upgrade` runs `/home/debian/run-forgejo.sh > /home/debian/run-forgejo-$(date +%d).log`
  - When a new major version is published (8.0 for instance) `run-forgejo.sh` must be updated with it
  - Reset everything
    ```sh
    docker stop forgejo
    docker rm forgejo
    sudo rm -fr /srv/forgejo.old
    sudo mv /srv/forgejo /srv/forgejo.old
    bash -x /home/debian/run-forgejo.sh
    ```
  - `/home/debian/next.nftables`
    ```
    add table ip next;
    flush table ip next;
    add chain ip next prerouting {
      type nat hook prerouting priority 0;
      policy accept;
      ip daddr 65.21.67.65 tcp dport { 2020 } dnat to 10.6.83.213;
    };
    ```
  - Add to `iface enp5s0 inet static` in `/etc/network/interfaces`
    ```
    up nft -f /home/debian/next.nftables
    ```

  ```
  - `/etc/nginx/sites-available/next.forgejo.org` same as `/etc/nginx/sites-available/code.forgejo.org`

  ```

- `forgejo-v7` on hetzner02

  Dedicated to https://v7.next.forgejo.org

  - Docker enabled
  - `/etc/cron.hourly/forgejo-upgrade` runs `/home/debian/run-forgejo.sh > /home/debian/run-forgejo-$(date +%d).log`
  - Reset everything
    ```sh
    docker stop forgejo
    docker rm forgejo
    sudo rm -fr /srv/forgejo.old
    sudo mv /srv/forgejo /srv/forgejo.old
    bash -x /home/debian/run-forgejo.sh
    ```
  - `/home/debian/v7.nftables`
    ```
    add table ip v7;
    flush table ip v7;
    add chain ip v7 prerouting {
      type nat hook prerouting priority 0;
      policy accept;
      ip daddr 65.21.67.65 tcp dport { 2070 } dnat to 10.6.83.179;
    };
    ```
  - Add to `iface enp5s0 inet static` in `/etc/network/interfaces`
    ```
    up nft -f /home/debian/v7.nftables
    ```

  ```
  - `/etc/nginx/sites-available/v7.forgejo.org` same as `/etc/nginx/sites-available/code.forgejo.org`

  ```

- `static-pages` on hetzner02

  See [the static pages documenation](../static-pages/) for more information.

  - Unprivileged

- `runner-forgejo-helm` on hetzner03

  Dedicated to https://codeberg.org/forgejo-contrib/forgejo-helm and running from an ephemeral disk

## hetzner{05,06}

https://hetzner05.forgejo.org & https://hetzner06.forgejo.org run on [EX44](https://www.hetzner.com/dedicated-rootserver/ex44) Hetzner hardware.

Nodes of [a k8s cluster](k8s.md).

## Uberspace

The website https://forgejo.org is hosted at
https://uberspace.de/. The https://codeberg.org/forgejo/website/ CI
has credentials to push HTML pages there.