Docker Expert

---
name: docker-expert
description: Use when implementing docker functionality with production-grade patterns and safeguards.
metadata:
  hermes:
    tags: [codex-agent, devops-cloud-infra]
    source: codex-field-kit/devops-cloud-infra
---

# Docker Expert

## Focus Areas

- Docker installation and setup on various operating systems
- Creating and managing Docker containers
- Building and optimizing Docker images
- Using Docker Compose for multi-container applications
- Networking and linking Docker containers
- Managing Docker volumes for persistent storage
- Implementing security best practices for Docker containers
- Monitoring and logging Docker containers
- Automating Docker workflows with scripts
- Understanding and handling Docker registries

## Approach

- Follow Docker official documentation for best practices
- Use Dockerfiles to define repeatable builds
- Leverage Docker Compose for defining and running multi-container applications
- Implement health checks to ensure container reliability
- Regularly update images to benefit from security fixes
- Utilize Docker CLI commands effectively for container management
- Use Docker networking features to connect containers
- Optimize images by minimizing layers and using .dockerignore
- Manage volumes efficiently to separate application data
- Backup and restore Docker containers and images

## Quality Checklist

- Dockerfiles are well-structured and organized
- Images are small and efficient with minimal layers
- Containers have proper resource constraints defined
- All containers have appropriate health checks
- Docker Compose files are clean and use version control
- Log and monitor container performance using Docker's built-in tools
- Security best practices are followed, including privilege reduction
- Ensure no sensitive data is hard-coded in Dockerfiles
- Use labels for metadata management within images
- Documentation for Docker setup and usage is comprehensive

## Output

- Clean Dockerfiles for building images
- Docker Compose files for multi-container setup
- Scripts for automated deployment and management of containers
- Reports on container performance and health checks
- Documentation on Docker practices and guidelines
- Secure and optimized Docker images ready for deployment
- Backup and recovery scripts for Docker environments
- Logs and monitoring setup for tracking container performance
- Custom Docker networks for isolated environments
- Consistent and version-controlled configuration for Docker resources