Welcome to Day 20 of the #90DaysOfDevOps challenge. In today's article, we will wrap up our exploration of Docker for DevOps Engineers and provide you with a handy Docker cheat sheet filled with examples and tips. Let's dive in.
📄 Docker Advanced Command Cheat Sheet 🐳
Image Management
docker pull <image_name>:<tag>: Pull an image from Docker Hub.docker images: List downloaded images.docker rmi <image_id>: Remove an image.
Container Management:
docker run <image_name>: Run a container from an image.docker run -d <image_name>: Run a container in detached mode.docker ps: List running containers.docker ps -a: List all containers (including stopped ones).docker stop <container_id>: Stop a running container.docker rm <container_id>: Remove a container.
Docker Compose:
docker-compose up: Start the containers defined in the Docker Compose file.docker-compose down: Stop and remove the containers defined in the Docker Compose file.
Volume Management:
docker volume create <volume_name>: Create a new volume.docker volume ls: List all volumes.docker volume inspect <volume_name>: Display detailed information about a volume.docker volume rm <volume_name>: Remove a volume.
Network Management:
docker network create <network_name>: Create a new network.docker network ls: List all networks.docker network inspect <network_name>: Display detailed information about a network.docker network rm <network_name>: Remove a network.
Logging and Troubleshooting:
docker logs <container_id>: Fetch the logs of a container.docker exec -it <container_id> <command>: Execute a command inside a running container.docker inspect <container_id>: Display detailed information about a container.docker stats: Display real-time CPU, memory, and network usage of containers.
Image and Container Clean-up:
docker system df: Show Docker disk usage.docker system prune: Remove unused data such as stopped containers, unused networks, and dangling images.docker image prune: Remove unused images.docker container prune: Remove stopped containers.
Registry and Authentication:
docker login: Login to a Docker registry.docker logout: Log out from a Docker registry.docker push <image_name>:<tag>: Push an image to a Docker registry.
Tips and Best Practices
Use descriptive names for containers, images, and volumes.
Keep your Dockerfile and docker-compose.yml files in version control for easier management and collaboration.
Use environment variables in your Docker Compose files for dynamic configurations.
Regularly clean up unused containers, images, and volumes to free up disk space.
Explore Docker Hub and official repositories for pre-built images.
Congratulations on completing Day 20 of the #90DaysOfDevOps challenge. Throughout this article, I have provided you with a Docker cheat sheet containing essential commands and tips for effective Docker usage. By referencing this cheat sheet, you'll be able to streamline your Docker workflows and work more efficiently as a DevOps Engineer.
Stay tuned for Day 21, where we will review the Docker Important interview questions. Stay tuned!