# CI with Gitea Actions

This document covers the Gitea Actions CI workflow for Familienarchiv, including the full workflow YAML, differences from GitHub Actions, and self-hosted runner provisioning.

---

## Runner Architecture

Familienarchiv uses **two runners** on the same Hetzner VPS:

| Runner | Purpose | Config |
|---|---|---|
| `gitea` (Docker container) | Hosts Gitea itself | `infra/gitea/docker-compose.yml` |
| `gitea-runner` (Docker container) | Runs all CI and deploy jobs | `infra/gitea/docker-compose.yml` + `/root/docker/gitea/runner-config.yaml` |

Both containers live in the `gitea_gitea` Docker network on the VPS. The runner connects to Gitea via the LAN IP so job containers (which don't share the `gitea_gitea` network) can also reach it.

### Docker-out-of-Docker (DooD)

The `gitea-runner` container mounts the host Docker socket (`/var/run/docker.sock`). When a workflow job runs, act_runner spawns a **sibling container** for each job. That job container also gets the Docker socket mounted (via `valid_volumes` in `runner-config.yaml`), enabling `docker compose` calls in workflow steps.

### Running host-level commands from CI (nsenter pattern)

Job containers are unprivileged and do not share the host's PID/mount/network namespaces. Commands like `systemctl` that target the host daemon are therefore unavailable by default. When a workflow step needs to manage a host service (e.g. `systemctl reload caddy`), it uses the Docker socket to spin up a **privileged sibling container** in the host PID namespace:

```yaml
- name: Reload Caddy
  run: |
    docker run --rm --privileged --pid=host \
      alpine:3.21@sha256:48b0309ca019d89d40f670aa1bc06e426dc0931948452e8491e3d65087abc07d \
      sh -c 'apk add --no-cache util-linux -q && nsenter -t 1 -m -u -n -p -i -- /bin/systemctl reload caddy'
```

`nsenter -t 1 -m -u -n -p -i` enters the init process's mount, UTS, IPC, network, PID, and cgroup namespaces, giving `systemctl` a view of the real host systemd. No sudoers entry is required — the Docker socket already grants root-equivalent host access.

Alpine is used instead of Ubuntu: ~5 MB vs ~70 MB, and the digest is pinned to a specific sha256 so any upstream change requires an explicit Renovate bump PR. `util-linux` (which ships `nsenter`) is not part of the Alpine base image but is installed at run time in ~1 s from the warm VPS cache.

#### Why not `sudo systemctl` in the job container?

Job containers run as root inside an unprivileged Docker namespace. There is no systemd PID 1 inside the container — `systemctl` would attempt to reach a socket that does not exist. `sudo` is not present in container images and would not help even if it were.

#### Why not Caddy's admin API?

Caddy ships a localhost admin API at `:2019` by default. Job containers do not share the host network namespace, so they cannot reach `localhost:2019` on the host. Exposing `:2019` on a host-bound port to make it reachable would add a network attack surface with no benefit over the current approach.

### Caddyfile symlink contract

The deploy workflows reload Caddy to pick up committed Caddyfile changes. This relies on a symlink that must exist on the VPS:

```
/etc/caddy/Caddyfile → /opt/familienarchiv/infra/caddy/Caddyfile
```

Created once during server bootstrap (see `docs/DEPLOYMENT.md §3.1`). Verify with:

```bash
ls -la /etc/caddy/Caddyfile
# Expected: lrwxrwxrwx ... /etc/caddy/Caddyfile -> /opt/familienarchiv/infra/caddy/Caddyfile
```

### Troubleshooting: Reload Caddy step fails

**Failure mode 1 — Caddy is stopped**

Symptom in CI log:
```
Failed to reload caddy.service: Unit caddy.service is not active.
```

Recovery:
```bash
ssh root@<vps>
systemctl start caddy
systemctl status caddy   # confirm Active: active (running)
```

Re-run the workflow via Gitea Actions → "Re-run workflow".

**Failure mode 2 — Caddyfile symlink is missing or mis-pointed**

This failure is silent — `systemctl reload caddy` exits 0 but Caddy reloads whatever `/etc/caddy/Caddyfile` currently resolves to. The smoke test may then pass against stale config.

Symptom: smoke test fails on the HSTS value or the `/actuator/health → 404` check despite the Reload Caddy step succeeding.

Diagnosis:
```bash
ssh root@<vps>
ls -la /etc/caddy/Caddyfile
# Should be: lrwxrwxrwx ... /etc/caddy/Caddyfile -> /opt/familienarchiv/infra/caddy/Caddyfile
```

Recovery if symlink is wrong or missing:
```bash
ln -sf /opt/familienarchiv/infra/caddy/Caddyfile /etc/caddy/Caddyfile
systemctl reload caddy
```

**Failure mode 3 — nsenter / Docker socket unavailable**

Symptom in CI log:
```
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock.
```
or
```
nsenter: failed to execute /bin/systemctl: No such file or directory
```

The first error means the Docker socket is not mounted into the job container — check `valid_volumes` in `/root/docker/gitea/runner-config.yaml` on the VPS. The second means the Alpine image is running but cannot enter the host mount namespace; verify `--privileged` and `--pid=host` are both present in the workflow step.

---

## Gitea vs GitHub Actions Differences

### Context Variable Names

| GitHub Actions | Gitea Actions |
|---|---|
| `github.sha` | `gitea.sha` |
| `github.actor` | `gitea.actor` |
| `github.repository` | `gitea.repository` |
| `github.ref_name` | `gitea.ref_name` |
| `secrets.GITHUB_TOKEN` | `secrets.GITEA_TOKEN` (must be created manually) |

### Token Name Difference

```yaml
# GitHub Actions
password: ${{ secrets.GITHUB_TOKEN }}

# Gitea Actions — use a Gitea access token stored as a secret
password: ${{ secrets.GITEA_TOKEN }}
```

### Container Registry

```yaml
# GitHub Actions — GHCR
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
tags: ghcr.io/${{ github.repository }}/app:${{ github.sha }}

# Gitea Actions — Gitea Package Registry
registry: gitea.example.com
username: ${{ gitea.actor }}
password: ${{ secrets.GITEA_TOKEN }}
tags: gitea.example.com/${{ gitea.repository }}/app:${{ gitea.sha }}
```

---

## What Works Identically Between GitHub and Gitea Actions

- `uses: actions/checkout@v4` -- works unchanged
- `uses: actions/setup-java@v4` -- works unchanged
- `uses: actions/setup-node@v4` -- works unchanged
- `uses: actions/cache@v4` -- works unchanged
- `uses: docker/build-push-action@v5` -- works unchanged
- `container:` key for running jobs inside a Docker image -- works unchanged
- Secrets syntax `${{ secrets.MY_SECRET }}` -- works unchanged

---

## Full CI Workflow YAML

This is the complete `ci.yml` workflow, updated for Gitea with key changes highlighted.

```yaml
# Updated for Gitea — key changes highlighted

name: CI

on:
  push:
  pull_request:

jobs:
  unit-tests:
    name: Unit & Component Tests
    runs-on: ubuntu-latest          # matches runner label registered above
    container:
      image: mcr.microsoft.com/playwright:v1.58.2-noble
    steps:
      - uses: actions/checkout@v4
      - name: Cache node_modules
        uses: actions/cache@v4
        with:
          path: frontend/node_modules
          key: node-modules-${{ hashFiles('frontend/package-lock.json') }}
      - name: Install dependencies
        if: steps.node-modules-cache.outputs.cache-hit != 'true'
        run: npm ci
        working-directory: frontend
      - name: Lint
        run: npm run lint
        working-directory: frontend
      - name: Run unit and component tests
        run: npm test
        working-directory: frontend
      - name: Upload screenshots
        if: always()
        uses: actions/upload-artifact@v3  # pinned per ADR-014 — Gitea Actions does not implement v4 protocol. Do NOT upgrade.
        with:
          name: unit-test-screenshots
          path: frontend/test-results/screenshots/

  backend-unit-tests:
    name: Backend Unit Tests
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: temurin
      - name: Cache Maven repository
        uses: actions/cache@v4
        with:
          path: ~/.m2/repository
          key: maven-${{ hashFiles('backend/pom.xml') }}
          restore-keys: maven-
      - name: Run backend tests
        run: |
          chmod +x mvnw
          ./mvnw clean test
        working-directory: backend
      - name: Upload test results
        if: always()
        uses: actions/upload-artifact@v3  # pinned per ADR-014 — Gitea Actions does not implement v4 protocol. Do NOT upgrade.
        with:
          name: backend-test-results
          path: backend/target/surefire-reports/

  e2e-tests:
    name: E2E Tests
    runs-on: ubuntu-latest
    env:
      DOCKER_API_VERSION: "1.43"
      POSTGRES_USER: archive_user
      POSTGRES_PASSWORD: ci_db_password
      POSTGRES_DB: family_archive_db
      MINIO_ROOT_USER: minio_admin
      MINIO_ROOT_PASSWORD: ci_minio_password
      MINIO_DEFAULT_BUCKETS: archive-documents
      PORT_DB: 5433
      PORT_MINIO_API: 9100
      PORT_MINIO_CONSOLE: 9101
      PORT_BACKEND: 8080
      PORT_FRONTEND: 3000
    steps:
      - uses: actions/checkout@v4
      - name: Cleanup leftover containers
        run: docker compose -f docker-compose.yml -f docker-compose.ci.yml down --volumes --remove-orphans || true
      - name: Start DB and MinIO
        run: docker compose -f docker-compose.yml -f docker-compose.ci.yml up -d db minio create-buckets
      - name: Wait for DB
        run: |
          timeout 30 bash -c \
            'until docker compose -f docker-compose.yml -f docker-compose.ci.yml exec -T db pg_isready -U archive_user; do sleep 2; done'
      - name: Connect job container to compose network
        run: docker network connect familienarchiv_archiv-net $(cat /etc/hostname)
      - uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: temurin
      - name: Cache Maven repository
        uses: actions/cache@v4
        with:
          path: ~/.m2/repository
          key: maven-${{ hashFiles('backend/pom.xml') }}
          restore-keys: maven-
      - name: Build backend
        run: |
          chmod +x mvnw
          ./mvnw clean package -DskipTests
        working-directory: backend
      - name: Start backend
        run: |
          java -jar backend/target/*.jar \
            --spring.profiles.active=e2e \
            --SPRING_DATASOURCE_URL=jdbc:postgresql://db:5432/family_archive_db \
            --SPRING_DATASOURCE_USERNAME=archive_user \
            --SPRING_DATASOURCE_PASSWORD=ci_db_password \
            --S3_ENDPOINT=http://minio:9000 \
            --S3_ACCESS_KEY=minio_admin \
            --S3_SECRET_KEY=ci_minio_password \
            --S3_BUCKET_NAME=archive-documents \
            --S3_REGION=us-east-1 \
            --APP_ADMIN_USERNAME=admin \
            --APP_ADMIN_PASSWORD=${{ secrets.E2E_ADMIN_PASSWORD }} \
            &
          timeout 90 bash -c \
            'until curl -sf http://localhost:8080/actuator/health | grep -q "UP"; do sleep 3; done'
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - name: Cache node_modules
        id: node-modules-cache
        uses: actions/cache@v4
        with:
          path: frontend/node_modules
          key: node-modules-${{ hashFiles('frontend/package-lock.json') }}
      - name: Install frontend dependencies
        if: steps.node-modules-cache.outputs.cache-hit != 'true'
        run: npm ci
        working-directory: frontend
      - name: Cache Playwright browsers
        id: playwright-cache
        uses: actions/cache@v4
        with:
          path: ~/.cache/ms-playwright
          key: playwright-chromium-${{ hashFiles('frontend/package-lock.json') }}
      - name: Install Playwright Chromium + system deps
        if: steps.playwright-cache.outputs.cache-hit != 'true'
        run: npx playwright install chromium --with-deps
        working-directory: frontend
      - name: Install Playwright system deps only
        if: steps.playwright-cache.outputs.cache-hit == 'true'
        run: npx playwright install-deps chromium
        working-directory: frontend
      - name: Run E2E tests
        run: npm run test:e2e
        working-directory: frontend
        env:
          E2E_BASE_URL: http://localhost:3000
          E2E_USERNAME: admin
          E2E_PASSWORD: ${{ secrets.E2E_ADMIN_PASSWORD }}   # ← secret, not hardcoded
          E2E_BACKEND_URL: http://localhost:8080
      - name: Upload E2E results
        if: always()
        uses: actions/upload-artifact@v3  # pinned per ADR-014 — Gitea Actions does not implement v4 protocol. Do NOT upgrade.
        with:
          name: e2e-results
          path: frontend/test-results/e2e/
```