panel/API.md

# panel-api

HTTP API wrapper around panelctl with a web UI.

Default bind: `127.0.0.1:9911`

## Endpoints

### Health & UI

| Method | Path | Description |
|--------|------|-------------|
| GET | `/` | Web UI (served from `frontend/index.html`) |
| GET | `/health` | Health check |
| GET | `/status` | All apps with routes, container status and running operation (what the UI polls) |

### Apps — Read

| Method | Path | Description |
|--------|------|-------------|
| GET | `/apps` | List all apps |
| GET | `/apps/<name>` | Show single app manifest |
| GET | `/apps/<name>/routes` | Get parsed route entries |
| GET | `/apps/<name>/status` | Container status (running/stopped) |
| GET | `/apps/<name>/compose` | Read compose.yaml content |
| GET | `/apps/<name>/logs?tail=N` | Fetch last N log lines (default 100) |
| GET | `/apps/<name>/backups` | List available backups |
| GET | `/apps/<name>/backups/<file>` | Download backup zip |
| GET | `/apps/<name>/repo` | Git source info (URL, branch, deployed commit, local changes) |
| GET | `/apps/<name>/repo?fetch=1` | Same, plus fetches the remote and reports `behind` / `remote` |
| GET | `/apps/<name>/volumes` | Volumes the file browser can open |
| GET | `/apps/<name>/volume/files?vol=&path=` | List a folder in a volume |
| GET | `/apps/<name>/volume/download?vol=&path=` | Download a file from a volume |
| PUT | `/apps/<name>/volume/files?vol=&path=` | Upload a file (raw body) |
| DELETE | `/apps/<name>/volume/files?vol=&path=` | Delete a file or folder |

### Apps — Write

| Method | Path | Description |
|--------|------|-------------|
| POST | `/apps/init` | Create a new app |
| POST | `/apps/<name>/routes` | Update routes (hot — Caddy reloads automatically) |
| POST | `/apps/<name>/deploy` | Deploy (compose up + caddy reload) |
| POST | `/apps/<name>/restart` | Restart (compose down + up) |
| POST | `/apps/<name>/stop` | Stop (compose down) |
| POST | `/apps/<name>/render-route` | Re-render Caddy route |
| POST | `/apps/<name>/compose` | Save compose.yaml content |
| POST | `/apps/<name>/validate-compose` | Validate compose file |
| POST | `/apps/<name>/backup` | Create volume backup (zip) |
| POST | `/apps/<name>/restore` | Restore from backup |
| POST | `/apps/<name>/remove` | Remove app |
| POST | `/apps/<name>/repo-pull` | Git apps: fetch branch, hard-reset checkout to it, redeploy |
| POST | `/apps/<name>/volume-clear` | Stop the app and empty its default data folder |

Write operations are serialised per app. While one runs, another write to the
same app returns `409` with `{"ok": false, "error": "...", "busy": "deploy"}`.
`deploy` returns the compose output in `stdout` (or `stderr` on failure).

### Create app (git repository)

```json
{
  "name": "blog",
  "routes": [{"domain": "blog.srazka.com", "upstream": "127.0.0.1:18090"}],
  "auth": true,
  "source_type": "github",
  "github_url": "https://git.srazka.com/reudy-net/blog.git",
  "github_branch": "",
  "github_pat": ""
}
```

Any http(s) git host works. An empty branch uses the repository's default branch.
The compose file must be at the repository root.

### Sync response (`repo-pull`)

```json
{
  "ok": true,
  "stdout": "HEAD is now at d7df557 Bump image tag\n...compose output...",
  "before": {"sha": "4fb7976...", "short": "4fb7976", "subject": "Initial compose", "author": "reudy", "time": 1790460618},
  "after": {"sha": "d7df557...", "short": "d7df557", "subject": "Bump image tag", "author": "reudy", "time": 1790460643},
  "changed": true
}
```

### Status response (`/status`)

```json
{
  "ok": true,
  "time": 1790460650,
  "apps": [
    {
      "name": "whoami",
      "routes": [{"domain": "whoami.srazka.com", "upstream": "127.0.0.1:18080"}],
      "auth": true,
      "compose_file": "/var/lib/containers/stacks/whoami/compose.yaml",
      "repo_url": "",
      "repo_branch": "",
      "busy": null,
      "status": {
        "state": "running",
        "running": true,
        "running_count": 1,
        "total": 1,
        "containers": [{"name": "whoami-app-1", "state": "running", "status": "Up 3 minutes", "image": "docker.io/traefik/whoami:latest", "running": true}]
      }
    }
  ]
}
```

`state` is one of `running`, `partial` (some containers down), `stopped` or `unknown`.

## Example payloads

### Create app (single route)

```json
{
  "name": "whoami",
  "routes": [
    {"domain": "whoami.srazka.com", "upstream": "127.0.0.1:18080"}
  ],
  "auth": true
}
```

### Create app (multiple routes, different ports)

```json
{
  "name": "myapp",
  "routes": [
    {"domain": "app.srazka.com", "upstream": "127.0.0.1:18080"},
    {"domain": "api.app.srazka.com", "upstream": "127.0.0.1:18081"}
  ],
  "auth": true
}
```

### Create app (multiple routes, different ports, with paths)

```json
{
  "name": "pocketbase",
  "routes": [
    {"domain": "pb.srazka.com", "upstream": "127.0.0.1:8090", "path": "/_/*"}
  ],
  "auth": true
}
```

The `path` field is optional. When present, it generates a Caddy `reverse_proxy /_/* 127.0.0.1:8090` rule, letting you route requests to a specific path prefix within a domain.

### Create app (wildcard domain)

```json
{
  "name": "wildcard",
  "routes": [
    {"domain": "*.srazka.com", "upstream": "127.0.0.1:18082"}
  ],
  "auth": false
}
```

Note: Wildcard domains require DNS challenge configuration in Caddy.

### Update routes (hot)

```json
{
  "routes": [
    {"domain": "app.srazka.com", "upstream": "127.0.0.1:18080"},
    {"domain": "api.srazka.com", "upstream": "127.0.0.1:18081"},
    {"domain": "pb.srazka.com", "upstream": "127.0.0.1:8090", "path": "/_/*"}
  ]
}
```

The optional `path` field generates a Caddy `reverse_proxy <path> <upstream>` rule for sub-path routing.

Caddy reloads automatically via the systemd path watcher. Containers stay running.

### Save compose

```json
{
  "content": "services:\n  app:\n    image: nginx:latest\n    ports:\n      - '127.0.0.1:18080:80'\n"
}
```

### Remove and keep volumes

```json
{
  "keepVolumes": true
}
```

### Restore from backup

```json
{
  "file": "whoami-20260101-120000.zip"
}
```

## Routes response

```json
{
  "ok": true,
  "name": "myapp",
  "routes": [
    {"domain": "app.srazka.com", "upstream": "127.0.0.1:18080"},
    {"domain": "api.srazka.com", "upstream": "127.0.0.1:18081", "path": "/api/*"}
  ]
}
```

The `path` field is only present when a route has a path configured.

## Response format

All JSON responses include an `ok` boolean:

```json
{
  "ok": true,
  "apps": [...]
}
```

Error responses:

```json
{
  "ok": false,
  "error": "description",
  "stderr": "panelctl error output"
}
```

## Status response

```json
{
  "ok": true,
  "name": "whoami",
  "running": true,
  "containers": [
    {
      "name": "whoami-app-1",
      "state": "running",
      "image": "docker.io/traefik/whoami:latest"
    }
  ]
}
```

## Local test

```bash
curl -s http://127.0.0.1:9911/health | jq .
curl -s http://127.0.0.1:9911/apps | jq .
curl -s http://127.0.0.1:9911/apps/whoami/status | jq .
curl -s http://127.0.0.1:9911/apps/whoami/logs?tail=50 | jq .
curl -s http://127.0.0.1:9911/apps/whoami/backups | jq .
```