3678f643ef
All checks were successful
PR build (required check) / changes (pull_request) Successful in 6s
secrets-guard / encrypted (pull_request) Successful in 7s
shell-lint / shellcheck (pull_request) Successful in 7s
PR build (required check) / build-backend (pull_request) Has been skipped
PR build (required check) / build-frontend (pull_request) Has been skipped
PR build (required check) / validate-observability (pull_request) Has been skipped
PR build (required check) / gate (pull_request) Successful in 2s
v1 dropped node:20-bookworm for a Node-free Debian base, on the wrong assumption that nothing in CI needs Node since the frontend is Go now. Forgejo's runner executes actions/checkout@v4 as `node dist/index.js` inside the job container regardless of what the workflow itself runs, so every job's checkout step failed. Caught from the live run within a minute; runner was reverted to node:20-bookworm immediately. v2 keeps the node:20-bookworm base and only adds docker-ce-cli + docker-buildx-plugin on top, preserving the actual fix (BuildKit instead of the classic builder, no per-job docker.io install) without removing a hard dependency.
171 lines
8 KiB
Markdown
171 lines
8 KiB
Markdown
# Forgejo on the Swarm cluster
|
|
|
|
Runs as `deploy/forgejo/docker-stack.yml` — the only Swarm-scheduled workload
|
|
this cluster carries (the Thermograph app itself stays on the
|
|
Terraform-managed `docker compose` deploys; see `terraform/README.md`).
|
|
Pinned to the **beta** node (old VPS) via the `role=forge` label from
|
|
`deploy/swarm/label-forge-node.sh`.
|
|
|
|
The Actions **runner** is deliberately *not* part of this stack — it runs on
|
|
the **desktop** as a plain systemd service (`register-lan-runner.sh` below),
|
|
per `thermograph-docs/runbooks/implementation-handoff.md` Track B step 5. That's the
|
|
canonical placement; an earlier revision of this stack ran the runner as a
|
|
Swarm-scheduled Docker-in-Docker sidecar pinned to beta, which is gone now.
|
|
|
|
## Prerequisites
|
|
|
|
1. All three nodes have joined the swarm (`deploy/swarm/`) and beta is
|
|
labeled `role=forge`.
|
|
2. `docker node ls` (from the manager) shows all three `Ready`.
|
|
|
|
## One-time setup: Swarm secret
|
|
|
|
One secret the stack expects to already exist (a Swarm secret, not a file —
|
|
`external: true` in the stack file, so `docker stack deploy` never creates or
|
|
sees the value, only references it):
|
|
|
|
```bash
|
|
# A strong random password for Forgejo's own Postgres (NOT related to
|
|
# Thermograph's app database — entirely separate instance/network).
|
|
openssl rand -base64 32 | docker secret create forgejo_db_password -
|
|
```
|
|
|
|
## Deploy / update
|
|
|
|
```bash
|
|
docker stack deploy -c deploy/forgejo/docker-stack.yml forgejo
|
|
```
|
|
|
|
Re-running is safe — Swarm only touches services whose spec actually changed.
|
|
Do this **before** the DNS + Caddy step below — Caddy's reverse_proxy target
|
|
(`127.0.0.1:3080`) needs the `forgejo` service actually listening first, or
|
|
its first health check just fails harmlessly until it is.
|
|
|
|
This stack has **no auto-deploy trigger** — nothing in `.forgejo/workflows/`
|
|
redeploys it on push. A change to `docker-stack.yml` only takes effect once
|
|
someone re-runs `docker stack deploy` by hand on the manager (prod).
|
|
|
|
`db`/`forgejo` both carry `resources.limits` (defaults: db 1 CPU/1g, forgejo 2
|
|
CPU/2g — several times observed steady-state usage), overridable with
|
|
`FORGEJO_DB_CPUS`/`FORGEJO_DB_MEMORY`/`FORGEJO_CPUS`/`FORGEJO_MEMORY` env vars
|
|
before `docker stack deploy`, same convention as the app stack.
|
|
|
|
## DNS + TLS: reusing beta's existing Caddy, not a second reverse proxy
|
|
|
|
Forgejo is pinned to beta (`role=forge`) — but beta is also **today's live
|
|
thermograph.org host**, and its Caddy already owns ports 80/443
|
|
(`/etc/caddy/Caddyfile` on that box). A second ingress (Traefik) trying to
|
|
bind the same ports would collide with it. So there's no Traefik in this
|
|
stack: `forgejo`'s web port publishes to `127.0.0.1:3080` only (host-local),
|
|
and beta's *existing* Caddy gets one more site block reverse-proxying to it —
|
|
same pattern as its `thermograph.org` block, same automatic-HTTPS.
|
|
|
|
1. Point the Forgejo domain (default `git.thermograph.org`; override with
|
|
`FORGEJO_DOMAIN=...` before `docker stack deploy`) at **beta's** public IP
|
|
— that's where the task actually runs, not prod's or the desktop's.
|
|
2. Append `deploy/forgejo/caddy-git.conf` to beta's `/etc/caddy/Caddyfile`,
|
|
adjusting the domain if you didn't use the default, then `systemctl reload
|
|
caddy`.
|
|
3. That file also resolves the registry-exposure hazard (#15 in
|
|
`thermograph-docs/runbooks/hop1-forgejo-registry-cutover.md`): `/v2/*` (the registry
|
|
API) is blocked to everything except the WireGuard mesh CIDR
|
|
(`10.10.0.0/24`); the git/web UI stays public. CI runners and Swarm nodes
|
|
reach the registry over the mesh, not the public internet — see "Registry
|
|
access from mesh clients" below.
|
|
|
|
## Registry access from mesh clients
|
|
|
|
Any node that needs `docker login`/push/pull against the registry (the
|
|
desktop's CI runner building/pushing images, later any Swarm node pulling
|
|
them) must reach `git.thermograph.org` **over the WireGuard tunnel**, not
|
|
beta's public IP — otherwise Caddy's `/v2/*` block above refuses the
|
|
connection. Public DNS resolves the domain to beta's public IP, so add a
|
|
`/etc/hosts` override on each such node pinning it to beta's WireGuard
|
|
address instead:
|
|
|
|
```
|
|
echo "10.10.0.2 git.thermograph.org" | sudo tee -a /etc/hosts
|
|
```
|
|
|
|
(`10.10.0.2` is beta's WG address per `deploy/swarm/README.md`'s peer
|
|
numbering — adjust if you assigned it differently.) The git/web UI keeps
|
|
working normally for everyone else since only `/v2/*` is restricted.
|
|
|
|
## Register the Actions runner (on the desktop, not through Swarm)
|
|
|
|
Once Forgejo answers at its domain:
|
|
|
|
```bash
|
|
# On the desktop:
|
|
# Forgejo web UI -> Site Administration -> Actions -> Runners -> Create new Runner
|
|
# (or, for a repo-scoped runner: <repo> -> Settings -> Actions -> Runners)
|
|
# copy the registration token, then:
|
|
bash deploy/forgejo/register-lan-runner.sh https://<forgejo-domain> <token>
|
|
```
|
|
|
|
See that script's header for exactly what it replaces (the pre-Forgejo GitHub
|
|
self-hosted runner on this same machine) and why it registers with two
|
|
labels where there used to be two separate runners.
|
|
|
|
## Custom CI job image (`ci-runner/`)
|
|
|
|
`ci-runner/Dockerfile` still bases on `node:20-bookworm` — Node is a hard
|
|
requirement, not leftover: Forgejo's runner executes `actions/checkout@v4`
|
|
(used by every workflow) as `node dist/index.js` *inside the job container*,
|
|
regardless of whether the workflow itself uses npm/node. (v1 of this image
|
|
tried a Node-free Debian-slim base and broke every job's checkout step —
|
|
`node: executable file not found` — within a minute of going live; reverted
|
|
immediately.) What it actually fixes: every `docker`-labeled build-push job
|
|
currently re-installs the Docker CLI on each run (`apt-get install
|
|
docker.io`), which pulls in the classic builder rather than BuildKit (the
|
|
classic builder mishandles `COPY --chown=<name>` group resolution — a real
|
|
bug hit during the frontend Go rewrite). `ci-runner` adds `docker-ce-cli` +
|
|
`docker-buildx-plugin` (BuildKit) on top of the same Node base, plus
|
|
`git`/`python3`/`python3-yaml` for the other jobs that need them
|
|
(`shell-lint`, `observability-validate`).
|
|
|
|
Current tag: `git.thermograph.org/emi/thermograph/ci-runner:v2` (`v1` is
|
|
broken — do not register any runner against it). Rebuild/push (requires a PAT
|
|
with `write:package` scope — the embedded git-remote token lacks it, same
|
|
requirement documented in `backend-build-push.yml`):
|
|
|
|
```bash
|
|
docker build -t git.thermograph.org/emi/thermograph/ci-runner:vN deploy/forgejo/ci-runner
|
|
docker push git.thermograph.org/emi/thermograph/ci-runner:vN
|
|
```
|
|
|
|
`register-lan-runner.sh`'s `LABELS` default points at the current tag, so
|
|
fresh registrations pick it up automatically. The live runner is cut over by
|
|
editing the `labels` array in `~/forgejo-runner/.runner` on the desktop (same
|
|
runner id/token, no re-registration needed) and restarting the service —
|
|
**verify a real job runs green under the new image before relying on it**,
|
|
same way v1's break was caught. Only after that verification should the
|
|
now-redundant `apt-get install docker.io` / `python3-yaml` steps be removed
|
|
from the workflows that had them — removing them first would break every job
|
|
still running on the stock `node:20-bookworm` image.
|
|
|
|
## Why Postgres here and not the Thermograph app's TimescaleDB
|
|
|
|
Separate instance, separate network (`forgejo_net`, not the app's compose
|
|
network), separate volume. Forgejo is a distinct product with its own schema
|
|
and its own backup/restore lifecycle — sharing a database with the app would
|
|
couple two things that should be able to fail, migrate, and restore
|
|
independently.
|
|
|
|
## Verifying
|
|
|
|
```bash
|
|
docker service ls # forgejo_db, forgejo_forgejo both Running, 1/1
|
|
curl -I https://git.thermograph.org/ # 200, valid cert (Caddy's, not a new one)
|
|
curl -I https://git.thermograph.org/v2/ # 403 from anywhere off the WireGuard mesh
|
|
# On the desktop, after registering the runner:
|
|
systemctl --user status forgejo-runner # active, both labels registered
|
|
```
|
|
|
|
## Rollback / removal
|
|
|
|
```bash
|
|
docker stack rm forgejo
|
|
# volumes (forgejo_data, forgejo_db, ...) survive a stack rm — remove them
|
|
# explicitly only if you actually want to destroy the Forgejo instance's data.
|
|
```
|