docker

name	docker
description	Docker and Docker Compose reference for container deployment, networking, volumes, and orchestration. Includes Proxmox hosting and LXC comparison patterns. Use when working with docker-compose.yaml, Dockerfiles, troubleshooting containers, or planning container architecture. Triggers: docker, compose, container, dockerfile, volume, network, service, lxc.
agent	docker-compose-expert

Docker Skill

Docker and Docker Compose reference for containerized application deployment and management.

Quick Reference

# Container operations
docker ps                         # List running containers
docker ps -a                      # List all containers
docker logs <container>           # View logs
docker logs -f <container>        # Follow logs
docker exec -it <container> sh    # Shell into container
docker inspect <container>        # Full container details

# Compose operations
docker compose up -d              # Start services (detached)
docker compose down               # Stop and remove
docker compose ps                 # List compose services
docker compose logs -f            # Follow all logs
docker compose pull               # Pull latest images
docker compose restart            # Restart services

# Troubleshooting
docker stats                      # Resource usage
docker network ls                 # List networks
docker network inspect <net>      # Network details
docker volume ls                  # List volumes
docker system df                  # Disk usage
docker system prune               # Clean up unused resources

Reference Files

Load on-demand based on task:

Topic	File	When to Load
Compose Structure	compose.md	Writing docker-compose.yaml
Networking	networking.md	Network modes, port mapping
Volumes	volumes.md	Data persistence, mounts
Dockerfile	dockerfile.md	Building images
Troubleshooting	troubleshooting.md	Common errors, diagnostics

Proxmox Integration

Topic	File	When to Load
Docker on Proxmox	proxmox/hosting.md	VM sizing, storage, GPU passthrough
LXC vs Docker	proxmox/lxc-vs-docker.md	Choosing container type

Compose File Quick Reference

name: myapp  # Project name (optional)

services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - ./html:/usr/share/nginx/html:ro
    networks:
      - frontend
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost"]
      interval: 30s
      timeout: 10s
      retries: 3

networks:
  frontend:
    driver: bridge

volumes:
  data:

Validation Checklist

Before deploying containers:

• Services defined with specific image tags (not :latest)
• Port mappings without conflicts
• Volumes for persistent data
• Networks configured appropriately
• Resource limits set (memory, CPU)
• Health checks for critical services
• Restart policy appropriate
• Secrets not in images or compose file
• .env file for environment variables

Network Mode Quick Decision

Mode	Use Case	Isolation
bridge	Default, most services	Container isolated
host	Performance, network tools	No isolation
macvlan	Direct LAN access	Own MAC/IP
ipvlan	Like macvlan, shared MAC	Own IP
none	No networking	Full isolation

Volume Type Quick Decision

Type	Use Case	Portability
Named volume	Database, app data	Best
Bind mount	Config files, dev	Host-dependent
tmpfs	Secrets, cache	Memory only