# Installing cc-ci from scratch

> WORK IN PROGRESS — grows with each milestone; the full from-scratch rebuild is verified at M9 (D8).

cc-ci is declared as a NixOS flake (this repo) plus a reproducible proxy-deploy step. Target:
a NixOS 24.11 host reachable as `cc-ci` over SSH (root), with the operator preconditions in place.

## Operator preconditions (class-A1, see DECISIONS.md / docs/baseline.md)

- Wildcard TLS cert at `/var/lib/ci-certs/live/{fullchain.pem,privkey.pem}`
  (`*.ci.commoninternet.net` + `ci.commoninternet.net`). **Renewed out-of-band; never ACME here.**
- DNS: `*.ci.commoninternet.net` (+ bare) → the **gateway**, which TLS-passthroughs (SNI) to cc-ci.
- Firewall path: gateway reaches cc-ci on tcp/80+443 (opened by `modules/swarm.nix`).

## 1. Apply the NixOS flake

The flake (`flake.nix`, `hosts/cc-ci/`, `modules/`) declares: base host, sops-nix (decrypts via the
host SSH key), Docker + single-node Swarm + the `proxy` overlay (`modules/swarm.nix`), and abra
(`modules/abra.nix`).

```sh
# materialise the repo on the host (the build runs on cc-ci itself — see DECISIONS.md deploy mech)
#   e.g. git clone <repo> /root/cc-ci   (or sync it)
nixos-rebuild switch --flake /root/cc-ci#cc-ci
# verify
systemctl is-system-running          # -> running
docker info --format '{{.Swarm.LocalNodeState}}'   # -> active
docker network ls | grep proxy       # -> proxy ... overlay swarm
```

> Tip: when driving the switch over an SSH session that rides Tailscale, run it as a detached unit so
> it survives a momentary drop, and **use the absolute flake path** (systemd units run with cwd `/`):
> `systemd-run --unit=ccci-sw --property=Type=oneshot nixos-rebuild switch --flake /root/cc-ci#cc-ci`

## 2. Deploy the reverse proxy (coop-cloud traefik, wildcard/file-provider, no ACME)

```sh
bash /root/cc-ci/scripts/deploy-proxy.sh
```

This idempotently deploys the canonical Co-op Cloud `traefik` recipe via abra in wildcard mode,
serving the pre-issued cert as the `ssl_cert`/`ssl_key` swarm secrets, with `LETS_ENCRYPT_ENV` empty
so no ACME ever runs (see DECISIONS.md "Proxy: real coop-cloud/traefik via abra"). Verify:

```sh
docker service ls | grep traefik     # app + socket-proxy, 1/1
# wildcard cert served end-to-end via the gateway:
curl -ksv --resolve probe.ci.commoninternet.net:443:<gateway-ip> https://probe.ci.commoninternet.net/ \
  2>&1 | grep -E 'subject:|HTTP/'    # -> CN=*.ci.commoninternet.net, HTTP 404 (no app router yet)
```

## 3. (later milestones) Drone, comment-bridge, dashboard, recipe enrollment

See `docs/enroll-recipe.md` (D5), `docs/secrets.md` (D6), `docs/runbook.md`. Added as those land.