Docker Containerization Best Practices

Docker Containerization Best Practices

Comprehensive containerization framework with 60+ rules across Dockerfile optimization, multi-service orchestration, production deployment, and development workflows. Designed for reliable, scalable container deployments from development to production.

When to Apply

Reference these guidelines when:

• Containerizing Django, FastAPI, or Celery applications
• Setting up multi-service architectures with Docker Compose
• Implementing production deployment pipelines
• Managing development environments consistently
• Scaling containerized applications
• Optimizing container performance and security

Rule Categories by Priority

| Priority | Category | Impact | Files Created | Prefix | | --- | --- | --- | --- | --- | --- | | 1 | Container Fundamentals | CRITICAL | 4 | dockerfile- | | 2 | Docker Build | CRITICAL | 4 | build- | | 3 | Application Containers | CRITICAL | 5 | app- | | 4 | Docker Compose | HIGH | 8 | compose- | | 5 | Orchestration | HIGH | 3 | swarm- | | 6 | Security | HIGH | 3 | security- | | 7 | Production Deployment | HIGH | 2 | deploy- | | 8 | Observability | MEDIUM | 3 | logging- | | 9 | Development Workflow | MEDIUM | 2 | dev- | | 10 | Infrastructure | MEDIUM | 3 | infra- | | 11 | Advanced Features | LOW | 3 | advanced- |

Quick Reference

1. Container Fundamentals (CRITICAL)

• dockerfile-security: Secure base images and vulnerability scanning
• dockerfile-optimization: Multi-stage builds and layer caching
• dockerfile-best-practices: Proper user management and signal handling
• image-management: Tagging strategies and registry usage

2. Docker Build (CRITICAL)

• build-buildx: Advanced build features with Buildx
• build-multiplatform: Cross-platform image building
• build-cache: Build caching for faster builds
• build-security: Secrets, SSH, and attestations in builds

3. Application Containers (CRITICAL)

• app-django: Django containerization with static files and migrations
• app-fastapi: FastAPI async containerization with Uvicorn
• app-celery: Celery containerization with broker integration
• app-database: Database containerization with persistence
• app-redis: Redis containerization for caching and data structures

4. Docker Compose (HIGH)

• compose-development: Development environment orchestration
• compose-production: Production-ready service composition
• compose-networking: Service communication and isolation
• compose-volumes: Data persistence and sharing
• compose-configs-secrets: Configuration and secrets management
• compose-multiple-files: Multiple compose files and includes
• compose-environment: Environment variables and interpolation
• compose-cli-advanced: Advanced CLI commands and project management

5. Orchestration (HIGH)

• swarm-setup: Docker Swarm cluster management
• swarm-services: Swarm service deployment and scaling
• swarm-networking: Swarm overlay networking and security

6. Security (HIGH)

• security-scanning: Docker Scout vulnerability scanning
• security-hardening: Container runtime security hardening
• security-compliance: Security compliance and best practices

7. Production Deployment (HIGH)

• deploy-registry: Container registry management and security
• deploy-scaling: Horizontal scaling and load balancing

8. Observability (MEDIUM)

• logging-drivers: Docker logging drivers and configuration
• logging-aggregation: Log aggregation and monitoring
• logging-troubleshooting: Debugging and troubleshooting containers

9. Development Workflow (MEDIUM)

• dev-hot-reload: Development with live code reloading
• dev-testing: Testing in containerized environments
• dev-debugging: Container debugging and troubleshooting
• dev-testing: Testing in containerized environments

10. Infrastructure (MEDIUM)

• infra-networking: Container networking patterns
• infra-security: Container runtime security
• infra-storage: Persistent storage and backups

11. Advanced Features (LOW)

• advanced-desktop: Docker Desktop features and development
• advanced-context: Docker context management
• advanced-api: Docker API and programmatic access

Quick Start

• 📖 Overview: skills/docker-skill/SKILL.md
• 📚 Complete Reference: skills/docker-skill/AGENTS.md
• 🔍 Specific Rules: skills/docker-skill/rules/[category]-[rule-name].md

| Total | 11 Categories | | 42 Files | 170+ Rules | |