autonomic-bot
a385148af9
Convert proxy+drone bring-up to writeShellApplication systemd oneshots that reconcile every activation (orchestrator steer). pkgs.abra overlay. Runner connected via RPC (polling, capacity=2). install.md = clone + nixos-rebuild switch. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
56 lines
3.1 KiB
Markdown
56 lines
3.1 KiB
Markdown
# Installing cc-ci from scratch
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> WORK IN PROGRESS — grows with each milestone; the full from-scratch rebuild is verified at M9 (D8).
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cc-ci is declared **entirely** as a NixOS flake (this repo). Bringing up the box is just
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**clone + `nixos-rebuild switch`** + the operator preconditions — no manual post-steps. The proxy
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(traefik) and Drone server are deployed by **idempotent-reconcile systemd oneshots** (`modules/
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proxy.nix`, `modules/drone.nix`) that converge the swarm to the desired state on every activation
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and boot (and self-heal drift), mirroring `swarm-init`. Target: a NixOS 24.11 host reachable as
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`cc-ci` over SSH (root).
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## Operator preconditions (class-A1, see DECISIONS.md / docs/baseline.md)
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- Wildcard TLS cert at `/var/lib/ci-certs/live/{fullchain.pem,privkey.pem}`
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(`*.ci.commoninternet.net` + `ci.commoninternet.net`). **Renewed out-of-band; never ACME here.**
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- DNS: `*.ci.commoninternet.net` (+ bare) → the **gateway**, which TLS-passthroughs (SNI) to cc-ci.
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- Firewall path: gateway reaches cc-ci on tcp/80+443 (opened by `modules/swarm.nix`).
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## 1. Apply the NixOS flake (this is the whole install)
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The flake (`flake.nix`, `hosts/cc-ci/`, `modules/`) declares: base host, sops-nix (decrypts via the
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host SSH key), Docker + single-node Swarm + the `proxy` overlay + firewall 80/443
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(`modules/swarm.nix`), abra (`modules/abra.nix` / `packages.nix`), the **traefik reconcile oneshot**
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(`modules/proxy.nix`), the **Drone server reconcile oneshot** (`modules/drone.nix`), and the
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**Drone exec runner** (`modules/drone-runner.nix`).
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```sh
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# materialise the repo on the host (the build runs on cc-ci itself — see DECISIONS.md deploy mech)
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# e.g. git clone <repo> /root/cc-ci (or sync it)
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nixos-rebuild switch --flake /root/cc-ci#cc-ci
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```
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On activation, the reconcile oneshots (`deploy-proxy`, `deploy-drone`) run automatically and converge
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the swarm. Verify:
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```sh
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systemctl is-system-running # -> running
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docker info --format '{{.Swarm.LocalNodeState}}' # -> active
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docker service ls # traefik (app+socket-proxy) + drone, all 1/1
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systemctl is-active deploy-proxy deploy-drone drone-runner-exec # -> active x3
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# wildcard cert served end-to-end via the gateway:
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curl -ksv --resolve probe.ci.commoninternet.net:443:<gateway-ip> https://probe.ci.commoninternet.net/ \
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2>&1 | grep -E 'subject:|HTTP/' # -> CN=*.ci.commoninternet.net, HTTP 404 (no app router yet)
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curl -ks --resolve drone.ci.commoninternet.net:443:<gateway-ip> \
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-o /dev/null -w '%{http_code}\n' https://drone.ci.commoninternet.net/healthz # -> 200
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```
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> Tip: when driving the switch over an SSH session that rides Tailscale, run it as a detached unit so
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> it survives a momentary drop, and **use the absolute flake path** (systemd units run with cwd `/`):
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> `systemd-run --unit=ccci-sw --property=Type=oneshot nixos-rebuild switch --flake /root/cc-ci#cc-ci`
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## 2. (later milestones) comment-bridge, dashboard, recipe enrollment
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See `docs/enroll-recipe.md` (D5), `docs/secrets.md` (D6), `docs/runbook.md`. Each new piece of infra
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is added as another idempotent reconcile oneshot, so this install stays a single `nixos-rebuild`.
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