# Deployment Guide - Supervisor UI

## Environment Variables

The Supervisor UI supports flexible configuration through environment variables that can be set at both build-time and runtime.

### Available Environment Variables

| Variable | Description | Default | Required |
|----------|-------------|---------|----------|
| `SUPERVISOR_HOST` | Supervisor API host/IP address | `localhost` | Yes |
| `SUPERVISOR_PORT` | Supervisor API port | `9001` | Yes |
| `SUPERVISOR_USERNAME` | Basic auth username (if enabled) | - | No |
| `SUPERVISOR_PASSWORD` | Basic auth password (if enabled) | - | No |
| `NODE_ENV` | Node environment | `production` | No |
| `PORT` | Application port | `3000` | No |

### Configuration Priority

Environment variables can be set at different stages, with runtime taking precedence:

1. **Runtime** (highest priority) - Docker run `-e` flags or docker-compose environment
2. **Build-time** - Docker build `--build-arg` flags
3. **Dockerfile defaults** (lowest priority)

## Docker Build Arguments

You can customize the build with build arguments:

```bash
docker build -t supervisor-ui \
  --build-arg SUPERVISOR_HOST=supervisor.example.com \
  --build-arg SUPERVISOR_PORT=9001 \
  --build-arg SUPERVISOR_USERNAME=admin \
  --build-arg SUPERVISOR_PASSWORD=secret \
  .
```

**Note**: Build arguments are embedded in the image layer. For sensitive credentials, prefer runtime environment variables.

## Docker Runtime Configuration

### Option 1: Environment Variables via Docker Run

```bash
docker run -d \
  --name supervisor-ui \
  -p 3000:3000 \
  -e SUPERVISOR_HOST=supervisor.example.com \
  -e SUPERVISOR_PORT=9001 \
  -e SUPERVISOR_USERNAME=admin \
  -e SUPERVISOR_PASSWORD=secret \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

### Option 2: Environment File

Create an `.env` file:

```env
SUPERVISOR_HOST=supervisor.example.com
SUPERVISOR_PORT=9001
SUPERVISOR_USERNAME=admin
SUPERVISOR_PASSWORD=secret
```

Run with env file:

```bash
docker run -d \
  --name supervisor-ui \
  -p 3000:3000 \
  --env-file .env \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

### Option 3: Docker Compose

Create a `.env` file in the same directory as `docker-compose.yml`:

```env
SUPERVISOR_HOST=supervisor.example.com
SUPERVISOR_PORT=9001
SUPERVISOR_USERNAME=admin
SUPERVISOR_PASSWORD=secret
```

The `docker-compose.yml` automatically picks up these variables:

```bash
docker-compose up -d
```

### Option 4: Docker Compose with Inline Environment

Edit `docker-compose.yml`:

```yaml
services:
  supervisor-ui:
    image: dev.pivoine.art/valknar/supervisor-ui:latest
    environment:
      - SUPERVISOR_HOST=supervisor.example.com
      - SUPERVISOR_PORT=9001
      - SUPERVISOR_USERNAME=admin
      - SUPERVISOR_PASSWORD=secret
```

## CI/CD - Gitea Workflows

### Automatic Builds

The project includes a Gitea Actions workflow that automatically builds and pushes Docker images to the Gitea registry.

**Workflow file**: `.gitea/workflows/docker-build-push.yml`

### Trigger Events

Images are built and pushed on:

1. **Push to main branch** → Tagged as `latest` and `main-<sha>`
2. **Push to develop branch** → Tagged as `develop` and `develop-<sha>`
3. **Git tags** (v*.*.* pattern) → Tagged as version (e.g., `v1.0.0`, `1.0`, `1`)
4. **Pull requests** → Built but not pushed (validation only)
5. **Manual workflow dispatch** → Custom tag specified by user

### Workflow Secrets

The workflow requires one secret to be configured in your Gitea repository:

- `REGISTRY_TOKEN` - Gitea personal access token with registry push permissions

#### Creating the Registry Token

1. Go to Gitea Settings → Applications → Generate New Token
2. Name: `GitHub Actions Registry`
3. Select scope: `write:package`
4. Copy the generated token
5. Go to Repository Settings → Secrets → Add Secret
6. Name: `REGISTRY_TOKEN`
7. Value: Paste the token

### Registry Authentication

To pull images from the Gitea registry:

```bash
# Login to registry
docker login dev.pivoine.art

# Pull image
docker pull dev.pivoine.art/valknar/supervisor-ui:latest
```

### Image Tags

After pushing to main, the following tags are available:

```bash
# Latest stable
dev.pivoine.art/valknar/supervisor-ui:latest

# Specific commit
dev.pivoine.art/valknar/supervisor-ui:main-abc1234

# Version tags (from git tags)
dev.pivoine.art/valknar/supervisor-ui:v1.0.0
dev.pivoine.art/valknar/supervisor-ui:1.0
dev.pivoine.art/valknar/supervisor-ui:1

# Development branch
dev.pivoine.art/valknar/supervisor-ui:develop
```

## Production Deployment Scenarios

### Scenario 1: Supervisor on Same Host

Deploy UI on the same host as Supervisor:

```bash
docker run -d \
  --name supervisor-ui \
  --network host \
  -e SUPERVISOR_HOST=localhost \
  -e SUPERVISOR_PORT=9001 \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

Using `--network host` allows the container to access localhost services.

### Scenario 2: Supervisor on Different Host

Deploy UI on a different host:

```bash
docker run -d \
  --name supervisor-ui \
  -p 3000:3000 \
  -e SUPERVISOR_HOST=192.168.1.100 \
  -e SUPERVISOR_PORT=9001 \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

Ensure the Supervisor inet_http_server is accessible from the UI host (not bound to 127.0.0.1).

### Scenario 3: Multiple Supervisor Instances (Future)

While the current version connects to a single instance, you can run multiple UI containers:

```bash
# Production Supervisor UI
docker run -d \
  --name supervisor-ui-prod \
  -p 3000:3000 \
  -e SUPERVISOR_HOST=prod.supervisor.local \
  dev.pivoine.art/valknar/supervisor-ui:latest

# Staging Supervisor UI
docker run -d \
  --name supervisor-ui-staging \
  -p 3001:3000 \
  -e SUPERVISOR_HOST=staging.supervisor.local \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

### Scenario 4: Behind Reverse Proxy (nginx/Traefik)

Example nginx configuration:

```nginx
server {
    listen 80;
    server_name supervisor.example.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}
```

Example Traefik docker-compose labels:

```yaml
services:
  supervisor-ui:
    image: dev.pivoine.art/valknar/supervisor-ui:latest
    environment:
      - SUPERVISOR_HOST=supervisor.local
      - SUPERVISOR_PORT=9001
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.supervisor-ui.rule=Host(`supervisor.example.com`)"
      - "traefik.http.routers.supervisor-ui.entrypoints=websecure"
      - "traefik.http.routers.supervisor-ui.tls.certresolver=letsencrypt"
      - "traefik.http.services.supervisor-ui.loadbalancer.server.port=3000"
```

### Scenario 5: Docker Compose Stack

Complete production-ready stack with reverse proxy:

```yaml
version: '3.8'

services:
  supervisor-ui:
    image: dev.pivoine.art/valknar/supervisor-ui:latest
    container_name: supervisor-ui
    restart: unless-stopped
    environment:
      - SUPERVISOR_HOST=${SUPERVISOR_HOST}
      - SUPERVISOR_PORT=${SUPERVISOR_PORT}
      - SUPERVISOR_USERNAME=${SUPERVISOR_USERNAME}
      - SUPERVISOR_PASSWORD=${SUPERVISOR_PASSWORD}
    networks:
      - supervisor-network
    healthcheck:
      test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000/api/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 5s
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.supervisor-ui.rule=Host(`supervisor.yourdomain.com`)"
      - "traefik.http.services.supervisor-ui.loadbalancer.server.port=3000"

networks:
  supervisor-network:
    external: true
```

## Security Considerations

### 1. Credentials Management

**Bad** (credentials in image):
```bash
docker build --build-arg SUPERVISOR_PASSWORD=secret .
```

**Good** (credentials at runtime):
```bash
docker run -e SUPERVISOR_PASSWORD=secret ...
```

**Better** (use secrets management):
```bash
# Docker Swarm secrets
echo "secret_password" | docker secret create supervisor_password -
```

### 2. Network Isolation

Use Docker networks to isolate services:

```yaml
services:
  supervisor-ui:
    networks:
      - internal  # Only accessible from other containers

  nginx:
    networks:
      - internal
      - public    # Exposed to internet
```

### 3. Read-only Filesystem

For enhanced security, run with read-only root filesystem:

```bash
docker run -d \
  --read-only \
  --tmpfs /tmp \
  -e SUPERVISOR_HOST=supervisor.local \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

### 4. Resource Limits

Prevent resource exhaustion:

```yaml
services:
  supervisor-ui:
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 256M
        reservations:
          cpus: '0.25'
          memory: 128M
```

## Monitoring & Health Checks

### Health Check Endpoint

The application provides a health check at `/api/health`:

```bash
curl http://localhost:3000/api/health
# {"status":"healthy","timestamp":"2025-11-23T17:00:00.000Z"}
```

### Docker Health Check

Built-in health check monitors the API:

```bash
docker inspect supervisor-ui --format='{{.State.Health.Status}}'
```

### Integration with Monitoring Tools

#### Prometheus

Add health check as a target in `prometheus.yml`:

```yaml
scrape_configs:
  - job_name: 'supervisor-ui'
    metrics_path: '/api/health'
    static_configs:
      - targets: ['supervisor-ui:3000']
```

#### Uptime Kuma

Add HTTP(s) monitor:
- Monitor Type: HTTP(s)
- URL: `http://supervisor-ui:3000/api/health`
- Interval: 60 seconds

## Troubleshooting

### Container won't start

Check logs:
```bash
docker logs supervisor-ui
```

Common issues:
- Port 3000 already in use
- Invalid environment variables
- Network connectivity issues

### Can't connect to Supervisor

1. Check if Supervisor is accessible:
```bash
# From host
curl http://supervisor-host:9001/RPC2

# From container
docker exec supervisor-ui curl http://supervisor-host:9001/RPC2
```

2. Verify Supervisor configuration in `/etc/supervisor/supervisord.conf`:
```ini
[inet_http_server]
port = *:9001  ; Listen on all interfaces, not just 127.0.0.1
```

3. Check environment variables:
```bash
docker exec supervisor-ui env | grep SUPERVISOR
```

### Authentication failures

Verify credentials match your Supervisor configuration:

```bash
# Test with curl
curl -u username:password http://supervisor-host:9001/RPC2
```

## Rollback Strategy

### Quick Rollback to Previous Version

```bash
# Stop current version
docker stop supervisor-ui
docker rm supervisor-ui

# Run previous version
docker run -d \
  --name supervisor-ui \
  -p 3000:3000 \
  --env-file .env \
  dev.pivoine.art/valknar/supervisor-ui:v1.0.0  # Specific version
```

### Using Docker Compose

```bash
# Edit docker-compose.yml to use previous tag
# Then:
docker-compose up -d --force-recreate
```

## Backup & Recovery

### No Persistent Data

The Supervisor UI is stateless and doesn't store any data. All configuration is in environment variables.

To "backup" your deployment:
1. Save your `.env` file or docker-compose.yml
2. Document your Supervisor connection details

To "restore":
1. Pull the image
2. Apply your saved environment configuration
3. Start the container

## Performance Tuning

### Node.js Optimization

For better performance in production:

```bash
docker run -d \
  -e NODE_OPTIONS="--max-old-space-size=256" \
  -e SUPERVISOR_HOST=supervisor.local \
  dev.pivoine.art/valknar/supervisor-ui:latest
```

### Caching Strategies

The application uses React Query with intelligent caching:
- System info: 5 second stale time
- Processes: 3 second stale time
- Logs: 2 second stale time

These are optimized for real-time monitoring while minimizing API calls.

## Scaling Considerations

### Horizontal Scaling

The application is stateless and can be scaled horizontally:

```yaml
services:
  supervisor-ui:
    image: dev.pivoine.art/valknar/supervisor-ui:latest
    deploy:
      replicas: 3
      update_config:
        parallelism: 1
        delay: 10s
      restart_policy:
        condition: on-failure
```

### Load Balancing

Use nginx or Traefik to load balance across replicas:

```nginx
upstream supervisor_ui {
    server supervisor-ui-1:3000;
    server supervisor-ui-2:3000;
    server supervisor-ui-3:3000;
}

server {
    location / {
        proxy_pass http://supervisor_ui;
    }
}
```

---

**Last Updated**: November 23, 2025
**Version**: 0.1.0