# Agent access, Docker Swarm, and Forgejo CI/CD

This covers three additive infrastructure layers on top of the app
containerization / Postgres / Terraform work described in
**`thermograph-docs/runbooks/implementation-handoff.md`** (read that first — it's the
canonical Track A/Track B plan this whole effort implements) and
`thermograph-docs/architecture/repo-topology-and-infrastructure.md`. Terraform provisions
**prod** (the new 48 GB / 12-core box, `thermograph.org`) and **beta** (the
old VPS, `75.119.132.91`) — see `terraform/README.md` /
`terraform.tfvars.example`. **None of this touches `backend/`, `Dockerfile`,
`docker-compose*.yml`, `terraform/`, or `deploy/db/`** — those stay owned by
the app-containerization work; this is strictly the layer above it.

```
Track 1: deploy/provision-agent-access.sh   — a dedicated full-root login for me
Track 2: deploy/swarm/                      — Swarm cluster spanning THREE nodes
Track 3: deploy/forgejo/ + .forgejo/         — Forgejo + Forgejo Actions, replacing GitHub
```

**Three nodes, not two**: prod, beta, and **the desktop** (the LAN dev
machine — same box that already runs the pre-Forgejo GitHub self-hosted
runner). This matches the canonical Track B design in the handoff doc; an
earlier revision of this whole effort covered just prod+beta and has been
realigned.

## Track 1 — Agent access

Run `sudo bash deploy/provision-agent-access.sh` on **prod and beta** (not
the desktop — that's wherever you're already working from, no separate
access-provisioning step needed there). Creates a dedicated `agent` user (not
raw root login — a distinct name gives a clean audit trail) with passwordless
sudo, installs the agent's public key, disables SSH password auth
fleet-wide, and turns on `auditd` logging of every root-effective command.
See the script's header comment for the full rationale and revocation steps
(one line to delete, or delete the whole account — your own access is never
affected).

### Current access state (live)

Both VPS boxes are provisioned and reachable as of this writing:

| Host | Role | Public IP | Login |
|------|------|-----------|-------|
| prod | Swarm manager; Thermograph's live prod home (`release`, thermograph.org) | `169.58.46.181` | `agent` |
| beta | Swarm worker; `main`/beta.thermograph.org + hosts Forgejo | `75.119.132.91`  | `agent` |
| desktop | Swarm worker, LAN dev machine + Forgejo Actions runner | (local) | (already have access) |

```
ssh -i ~/.ssh/thermograph_agent_ed25519 agent@169.58.46.181   # prod
ssh -i ~/.ssh/thermograph_agent_ed25519 agent@75.119.132.91    # beta
```

The private half of the agent's dedicated keypair lives at
`~/.ssh/thermograph_agent_ed25519` on the operator's own machine (never in
this repo, never in a CI secret) — same convention `DEPLOY.md` already uses
for the separate CI deploy key (`~/.ssh/thermograph_ci`). If you're setting
this up fresh elsewhere, generate a new pair the same way
(`ssh-keygen -t ed25519 -a 100 -C "claude-agent@thermograph-infra" -f
~/.ssh/thermograph_agent_ed25519 -N ""`), embed the new public half in
`AGENT_PUBKEY` at the top of `provision-agent-access.sh`, and re-run it on
both boxes — that replaces the authorized key wholesale rather than
appending, so an old key stops working the moment the new one lands.

**Keep the private key somewhere that survives** — not a scratch/temp
directory that gets cleaned up, not anywhere-in-repo. Losing it just means
regenerating and re-running the provisioning script; it does not lock either
box, since your own login is untouched.

**Live as of 2026-07-21** (was: "no Docker / Terraform not applied / Swarm
inactive" — all now done): Docker is installed on all three nodes; the
WireGuard mesh and Docker Swarm are up with all three nodes `Ready` (prod
manager, beta + desktop workers); Terraform has been applied to both VPS
boxes (prod stood up fresh on `release`, beta rebuilt on `main`); Forgejo is
serving at `git.thermograph.org`; and the desktop runs the Forgejo Actions
runner. See the verification checklist at the end.

## Track 2 — Swarm

See `deploy/swarm/README.md` for the exact order of operations across all
**three** nodes (WireGuard mesh first, then swarm init/join, then lock the
Swarm ports down to the tunnel interface, then label beta for Forgejo
placement). This cluster's only job is hosting Forgejo — it does not
orchestrate the Terraform-managed app deploys.

## Track 3 — Forgejo, replacing GitHub

### 3a. Stand up Forgejo
See `deploy/forgejo/README.md` — deploys the stack (pinned to beta), then
walks through registering the Actions runner **on the desktop** as a plain
systemd service (`register-lan-runner.sh`), not as a Swarm-scheduled
container. Only one Swarm secret to mint now (`forgejo_db_password`) — the
runner token is no longer a Swarm secret, since the runner isn't a Swarm
service anymore.

### 3b. Migrate the repo (mirror first, verify, then cut over)
1. In Forgejo: **+ New Migration → GitHub**. Point it at
   `https://github.com/griffemi/thermograph`, pull code + issues + PRs +
   releases + labels. This is non-destructive to GitHub — do this as a mirror
   and leave GitHub live and untouched until you're confident.
2. Spot-check: branch list matches, a few PRs/issues render correctly, LFS (if
   any) came across.
3. **Don't retarget any secret or disable a GitHub workflow yet** — see 3d.

### 3c. Workflows
`.forgejo/workflows/{build,pr-build,deploy-dev,deploy}.yml` mirror
`.github/workflows/*.yml`, copied with the mechanical changes Forgejo needs:
- `runs-on: ubuntu-latest` → `runs-on: docker` (one of the two labels the
  desktop's runner registers under — see 3a; general CI/deploy jobs get a
  fresh container, the LAN-deploy job in `deploy-dev.yml` runs bare/host-native
  under the `thermograph-lan` label instead, since it needs real filesystem
  access).
- `appleboy/ssh-action` referenced by full GitHub URL (not mirrored in
  Forgejo's default action registry, unlike `actions/checkout` /
  `actions/setup-python`, which resolve unchanged).
- **The custom auto-merge workflow step is gone.** It existed only because
  GitHub's native branch protection/auto-merge is paywalled on private
  free-tier repos. Forgejo has no such tier: `dev` is protected with the
  `build` status check required (Settings → Branches). Forgejo does **not**
  auto-merge on green by itself — a ready, green, mergeable PR is merged
  **explicitly** (`POST .../pulls/{n}/merge`, `{"Do": "squash"}`), per
  `CLAUDE.md`. That merge is an ordinary push, so `deploy-dev.yml`'s push
  trigger fires naturally afterward.
- **Branch/deploy mapping (settled):** `.forgejo/workflows/deploy.yml`
  ("Deploy to beta VPS") triggers on `main` and SSHes to **beta**
  (`75.119.132.91`) running `deploy/deploy.sh`. **Prod is not deployed by a
  push-triggered workflow** — it's deployed with `terraform apply`
  (`terraform/README.md`) on the `release` branch. So the promotion chain is
  `dev` → `main` (this workflow deploys beta) → `release` (Terraform deploys
  prod). There is deliberately no `release`-triggered workflow.

A second, independent set of Forgejo workflows
(`.forgejo/workflows/{ci,build-push,ops-cron}.yml`) was added by a parallel
effort implementing `thermograph-docs/runbooks/implementation-handoff.md` Track A chunk
7 — see that doc and its own reconciliation PR (which already fixed its
runner-label and ssh-action guesses to match the real infrastructure here).
`ci.yml` duplicated this PR's `build.yml` exactly and was dropped in that
reconciliation; `build-push.yml` (image → Forgejo's built-in registry) and
`ops-cron.yml` (backup + IndexNow) are novel and still present.

### 3d. Cut over — DONE (2026-07-21)
The GitHub → Forgejo cutover is complete; this records what was done:
1. Deploy secrets (`SSH_HOST`, `SSH_USER`, `SSH_KEY`, `SSH_PORT`) live in
   Forgejo's repo Secrets, pointing at beta with a dedicated CI deploy key.
2. The LAN dev runner was re-pointed to Forgejo via
   `deploy/forgejo/register-lan-runner.sh` (systemd --user, on the desktop).
3. The repo was migrated into Forgejo; `dev`/`main`/`release` all promoted
   through Forgejo and deploys verified live.
4. GitHub is retired as git host and CI (PR "Retire GitHub as the git host and
   CI platform") — `origin` remains only as a read-only mirror of history.

## Verification checklist — all met (2026-07-21)
- [x] `ssh agent@<prod>` and `ssh agent@<beta>` both work; `sudo whoami` → `root`
- [x] Password SSH auth confirmed dead on both boxes (tested with an actual
      failed login attempt, not just config inspection)
- [x] `docker node ls` (from prod) shows all three nodes `Ready`
- [x] Swarm ports (2377/7946/4789) unreachable from outside the WireGuard tunnel
- [x] `https://git.thermograph.org` serves Forgejo over TLS; `/v2/` registry
      API is 403 from off-mesh (firewalled to the WireGuard CIDR)
- [x] A test PR flow verified: required `build` check runs → explicit squash
      merge → LAN dev deploy lands
- [x] GitHub retired as git host + CI; kept only as a read-only history mirror