Troubleshooting Guide
Common Issues
Container Won't Start
# Check container logs
docker-compose logs service-name
# Check container status
docker-compose ps
# Restart specific service
docker-compose restart service-name
Database Connection Issues
# Check database connectivity
docker-compose exec backend ping postgres
# Check database logs
docker-compose logs postgres
# Reset database
docker-compose down -v
docker-compose up -d postgres
# Monitor resource usage
docker stats
# Check container limits
docker inspect container-name | grep -A 10 "Memory"
# Analyze slow queries
docker-compose exec postgres pg_stat_statements
Network Issues
# List networks
docker network ls
# Inspect network
docker network inspect network-name
# Test connectivity
docker-compose exec backend ping frontend
Storage Issues
# Check disk usage
docker system df
# Clean up unused resources
docker system prune -a
# Check volume usage
docker volume ls
Monitoring Alerts
High CPU Usage
- Scale services:
docker-compose up -d --scale backend=3
- Check resource limits
- Optimize application code
Memory Leaks
- Restart affected containers
- Check application logs
- Monitor memory patterns
- Analyze slow queries
- Check connection pool settings
- Consider read replicas
Emergency Procedures
Complete System Recovery
# Stop all services
./scripts/cleanup.sh production
# Restore from backup
./scripts/restore.sh backup-file
# Redeploy
./scripts/deploy.sh production
Rollback Deployment
# Rollback to previous version
./scripts/deploy.sh production v1.0.0
# Verify rollback
./scripts/health-check.sh