# Health Check Examples for Docker Compose/Swarm

## Example 1: Portainer with Health Check
```yaml
version: '3.8'
services:
  portainer:
    image: portainer/portainer-ce:latest
    healthcheck:
      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:9000/api/status"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s
    deploy:
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
```

## Example 2: OpenWebUI with Health Check
```yaml
version: '3.8'
services:
  openwebui:
    image: ghcr.io/open-webui/open-webui:latest
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 60s
    deploy:
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
```

## Example 3: Nextcloud with Health Check
```yaml
version: '3.8'
services:
  nextcloud:
    image: nextcloud:latest
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:80/status.php"]
      interval: 60s
      timeout: 10s
      retries: 3
      start_period: 120s
    deploy:
      restart_policy:
        condition: on-failure
        delay: 10s
        max_attempts: 3
```

## Implementation Notes
- **interval**: How often to check (30-60s for most services)
- **timeout**: Max time to wait for check to complete
- **retries**: Number of consecutive failures before marking unhealthy
- **start_period**: Grace period after container start before checking

## Auto-Restart Configuration
All services should have restart policies configured:
- **condition**: `on-failure` or `any`
- **delay**: Time to wait before restarting
- **max_attempts**: Maximum restart attempts

## Monitoring Health Status
Check container health with:
```bash
docker ps --filter "health=unhealthy"
docker inspect <container_id> | jq '.[0].State.Health'
```