thermograph/infra/ACCESS.md

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

This covers three additive infrastructure layers on top of the host
provisioning / Postgres / Terraform work described in `terraform/README.md`
and (for the historical Track A/Track B plan this whole effort grew from,
including the decision to split this repo out of the app monorepo)
`thermograph-docs/runbooks/implementation-handoff.md` and
`thermograph-docs/architecture/repo-topology-and-infrastructure.md`.
**Note:** `terraform/README.md`'s own host table still describes the
pre-cutover shape (`prod` and `beta` as two single-purpose boxes) and has not
yet been updated to the vps1/vps2 split below — that file is out of this
pass's scope; treat this document as the current source of truth for the
physical topology in the meantime.

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

## The estate (renamed by role, not by environment)

The same two VPS boxes as always — **neither public IP nor WireGuard mesh
address moved** — plus the operator's desktop, now named for what they *do*
rather than which environment happens to live there:

| Host | Public IP | Mesh IP | Role |
|------|-----------|---------|------|
| **vps1** | `75.119.132.91` | `10.10.0.2` | "Operational programs": Forgejo (git + CI + registry, `git.thermograph.org`), Grafana/Loki/Alloy (`dashboard.thermograph.org`), the `emigriffith.dev` portfolio, and the **dev** environment (mesh-only, `10.10.0.2:8137`, no public DNS/Caddy/TLS) |
| **vps2** | `169.58.46.181` | `10.10.0.1` | "The deployed environment": **prod** and **beta**, as two separate Docker Swarm stacks, plus Centralis, Postfix, the backups, and the one shared TimescaleDB instance both stacks use |
| **desktop** | — | `10.10.0.3` | AI-model hosting (voice-to-text, an upcoming-feature LLM) plus flex Swarm-worker capacity. Hosts **no** Thermograph environment — `make dev-up` still works there, but only as a laptop-local rehearsal |

This is a **rename**, not a re-provisioning: vps1 is the box that used to be
called "beta" (it already ran Forgejo and Grafana before this split), and vps2
is the box that used to be called "prod". What moved is the **beta
environment** — off vps1 and onto vps2, so a beta green light is evidence
about prod (same orchestrator, same Postgres build, same Caddy, same mesh
position) — and the **dev environment**, off the desktop and onto vps1, so the
desktop can retire from the Thermograph estate entirely. See
`deploy/env-topology.sh`'s header comment for the full rationale.

**Three nodes on the Swarm mesh, not two**: vps2 (manager), vps1 (worker), and
the desktop (worker, flex capacity + AI model hosting). One manager, not more:
Raft needs 3 nodes for real quorum-based HA, and this cluster only has 3 nodes
total, so a second manager would still fall short of real HA while adding
split-brain risk. If the manager (vps2) goes down, the workers keep running
whatever was already scheduled on them (Forgejo, pinned to vps1) but the
cluster can't reschedule anything until vps2 is back — acceptable for a small
cluster whose only Swarm-scheduled workload today is Forgejo (prod and beta's
app stacks are separate Swarm stacks that also happen to run on vps2, the
manager, because their volumes are local to that node — see
`deploy/stack/thermograph-stack.yml`'s header).

## Track 1 — Agent access

Run `sudo bash deploy/provision-agent-access.sh` on **vps1 and vps2** (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 |
|------|------|-----------|-------|
| vps2 | Swarm manager; prod AND beta live here (`thermograph.org`, `beta.thermograph.org`) | `169.58.46.181` | `agent` |
| vps1 | Swarm worker; Forgejo + Grafana/Loki + dev (`git.thermograph.org`, `dashboard.thermograph.org`) | `75.119.132.91`  | `agent` |
| desktop | Swarm worker, AI-model hosting | (local) | (already have access) |

```
ssh -i ~/.ssh/thermograph_agent_ed25519 agent@169.58.46.181   # vps2 (prod + beta)
ssh -i ~/.ssh/thermograph_agent_ed25519 agent@75.119.132.91    # vps1 (dev + Forgejo + Grafana)
```

**On vps2, always say which environment you mean.** A shell on vps2 can act on
either `/opt/thermograph` (prod) or `/opt/thermograph-beta` (beta) — there is
no "the app" on that box any more. `deploy.sh` refuses to run if
`THERMOGRAPH_ENV` disagrees with the checkout it was invoked from (see
`deploy/env-topology.sh`), which catches the one genuinely dangerous mistake
here: running prod's checkout with `THERMOGRAPH_ENV=beta`, or the reverse.

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 keys. 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.

## 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 vps1 for Forgejo
placement). This cluster's Swarm-scheduled workload is Forgejo; prod and
beta's app stacks are separate `docker stack deploy`s that happen to live on
the same manager node (vps2) because their volumes are local to it today.

## Track 3 — Forgejo, replacing GitHub

### 3a. Stand up Forgejo
See `deploy/forgejo/README.md` — deploys the stack (pinned to **vps1**), then
walks through registering the Actions runner as a plain systemd service
(`register-lan-runner.sh`), not as a Swarm-scheduled container.

### 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}.yml` (a single `Deploy` workflow
now covers all three environments — see its own header comment) mirror
`.github/workflows/*.yml`, copied with the mechanical changes Forgejo needs:
- `runs-on: ubuntu-latest` → `runs-on: docker` (the runner's `docker` label —
  containerized jobs get a fresh container via the docker-socket-automounted
  runner).
- `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.yml`'s push
  trigger fires naturally afterward.
- **Branch/deploy mapping (settled):** `.forgejo/workflows/deploy.yml`
  triggers on `dev`, `main` and `release`, and SSHes to the environment each
  branch maps to (`dev` → dev on **vps1**, `main` → beta on **vps2**,
  `release` → prod on **vps2**), running `deploy/deploy-dev.sh` or
  `deploy/deploy.sh` per `deploy/env-topology.sh`. Credentials are keyed by
  **host** (`VPS1_SSH_*`, `VPS2_SSH_*`), not by environment, since vps2 alone
  now answers to two of them — see the workflow's own header comment for why
  that rename matters.

A second, independent set of Forgejo workflows
(`.forgejo/workflows/{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. `build-push.yml` (image →
Forgejo's built-in registry) and `ops-cron.yml` (backup + IndexNow) are novel
and still present; the latter's secrets are also keyed by host now (see its
own header comment).

### 3d. Cut over — DONE (2026-07-21)
The GitHub → Forgejo cutover is complete; this records what was done:
1. Deploy secrets live in Forgejo's repo Secrets, keyed by host
   (`VPS1_SSH_*`, `VPS2_SSH_*`) since the vps1/vps2 split, pointing at each
   box with a dedicated CI deploy key.
2. The Actions runner is registered against Forgejo via
   `deploy/forgejo/register-lan-runner.sh`.
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, topology as of 2026-07-25)
- [x] `ssh agent@<vps1>` and `ssh agent@<vps2>` 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 vps2, the manager) 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 → deploy lands on the branch's mapped environment
- [x] GitHub retired as git host + CI; kept only as a read-only history mirror

TODO(cutover): re-verify the checklist above against the vps1/vps2 rename
specifically (e.g. confirm the Forgejo Swarm label now reads `vps1`'s node
name, not a leftover `beta` node name) — this document was updated to match
the new topology brief, but a fresh live check wasn't run as part of this
pass.