Container fails to start or restarts repeatedly.
`docker compose ps` shows containers with `Exited` status. Services not accessible.
Multiple possible causes including configuration errors, port conflicts, or resource issues.
Steps:
1. Check logs: `docker compose logs service_name` 2. Check configuration: `docker compose config` 3. Verify no port conflicts: `netstat -tulpn | grep PORT` 4. Check disk space: `df -h`
Test configuration changes locally before deploying. Monitor disk space regularly.