commands/sysadmin/docker-help.md

Troubleshoot Docker environment issues and provide best practices guidance.

Your task:

1. Diagnose common Docker problems:

   • Container won't start
   • Network connectivity issues
   • Volume mounting problems
   • Permission errors
   • Image build failures
   • Resource constraints

2. Provide troubleshooting steps:

   # Check container logs
   docker logs container_name
   
   # Inspect container
   docker inspect container_name
   
   # Check resource usage
   docker stats
   
   # View running containers
   docker ps -a
   

3. Address specific issues:

   • Port conflicts
   • Volume permission issues (especially with bind mounts)
   • Network bridge problems
   • Image layer caching
   • Docker daemon issues

4. Best practices guidance:

   • Multi-stage builds
   • .dockerignore usage
   • Layer optimization
   • Security considerations
   • Resource limits

5. Deployment strategies:

   • Docker Compose for multi-container apps
   • Health checks
   • Restart policies
   • Environment variable management

Refer to latest Docker documentation. Help users with basic Linux/sysadmin knowledge overcome Docker challenges.