#90DaysOfDevOps Challenge - Day 20 - Docker for DevOps Engineers Wrap up

#90DaysOfDevOps Challenge - Day 20 - Docker for DevOps Engineers Wrap up


3 min read

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.

๐Ÿ“„ Docker Advanced Command Cheat Sheet ๐Ÿณ

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!

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