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Docker Troubleshooting

This file provides solutions to common Docker issues and troubleshooting techniques.

Common Issues​

Container Won't Start​

Problem: Container exits immediately Solutions:

  • Check container logs: docker logs container_id
  • Verify the command is correct
  • Ensure proper permissions
  • Check if ports are already in use

Image Build Failures​

Problem: Docker build fails Solutions:

  • Review Dockerfile syntax
  • Check file paths and permissions
  • Verify base image availability
  • Clear Docker cache: docker builder prune

Performance Issues​

Problem: Slow container performance Solutions:

  • Increase allocated resources
  • Optimize image size
  • Use volume mounts for data
  • Monitor resource usage

Debugging Commands​

# View container logs
docker logs -f container_name

# Execute commands in running container
docker exec -it container_name /bin/bash

# Inspect container details
docker inspect container_name

# View resource usage
docker stats

# Remove unused resources
docker system prune

Network Issues​

  • Check port mappings
  • Verify network connectivity
  • Review firewall settings
  • Test with docker network ls

Storage Problems​

  • Monitor disk space
  • Clean up unused volumes
  • Use docker volume prune
  • Check mount permissions