Docker Manage

Docker Manage

Docker container and image management.

Containers

# Status overview
docker ps -a --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}\t{{.Image}}"

# Resource usage
docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.NetIO}}"

# Logs
docker logs --tail 50 <container>
docker logs --since 1h <container>

# Lifecycle
docker restart <container>
docker stop <container>
docker start <container>

Images

docker images --format "table {{.Repository}}\t{{.Tag}}\t{{.Size}}\t{{.CreatedSince}}"
docker pull <image>:<tag>
docker image prune -f  # remove dangling

Docker Compose

docker compose ps
docker compose up -d <service>
docker compose logs -f --tail 100 <service>
docker compose restart <service>
docker compose pull && docker compose up -d  # update all

Health Checks

# Check container health
docker inspect --format='{{.State.Health.Status}}' <container>

# All unhealthy containers
docker ps --filter health=unhealthy

Troubleshooting

# Shell into container
docker exec -it <container> sh

# Port conflicts
docker ps --format "{{.Ports}}" | sort

# Disk usage
docker system df

# Network inspect
docker network ls
docker network inspect <network>

Safety

Always confirm before:

• docker rm / docker rmi
• docker system prune
• docker compose down -v (removes volumes!)