Day 20 Task: Cheat-Sheet for Docker

Docker Commands Cheat-Sheet:

1. Docker Image Management:

   • docker pull <image_name>: Pull an image from Docker Hub.

   • docker build -t <image_name> .: Build a Docker image from a Dockerfile in the current directory.

   • docker images: List all available Docker images.

   • docker rmi <image_id>: Remove a Docker image.

2. Container Management:

   • docker run -d --name <container_name> <image_name>: Run a Docker container in the background.

   • docker ps: List all running containers.

   • docker ps -a: List all containers (including stopped ones).

   • docker start <container_id>: Start a stopped container.

   • docker stop <container_id>: Stop a running container.

   • docker rm <container_id>: Remove a stopped container.

3. Logs and Inspection:

   • docker logs <container_id>: View container logs.

   • docker inspect <container_id>: Get detailed information about a container.

4. Interactive Shells:

   • docker exec -it <container_id> /bin/bash: Start an interactive shell inside a running container.

5. Port Mapping:

   • docker run -p <host_port>:<container_port> <image_name>: Map a container's port to a host port.

6. Volume Management:

   • docker volume create <volume_name>: Create a Docker volume.

   • docker run -v <volume_name>:<container_path> <image_name>: Mount a volume to a container.

   • docker volume ls: List Docker volumes.

   • docker volume create <volume>: Create a named Docker volume.

   • docker volume inspect <volume>: Display detailed information about a volume.

   • docker run -v <volume>:<container-path>: Mount a volume into a container.

7. Networks:

   • docker network ls: List Docker networks.

   • docker network create <network_name>: Create a custom Docker network.

   • docker network connect <network_name> <container_id>: Connect a container to a network.

Docker Compose:

Docker-Compose Commands Cheat-Sheet:

1. Compose Up and Down:

   • docker-compose up -d: Start services defined in the docker-compose.yml file in detached mode.

   • docker-compose down: Stop and remove containers defined in the docker-compose.yml file.

2. Logs and Inspection:

   • docker-compose logs: View logs for all services.

   • docker-compose ps: List the status of containers in the Compose project.

   • docker-compose exec <service_name> /bin/bash: Start an interactive shell in a service container.

3. Scaling Services:

   • docker-compose up -d --scale <service_name>=<number_of_instances>: Scale a service to run multiple instances.

4. Building and Rebuilding:

   • docker-compose build: Build or rebuild services as defined in the docker-compose.yml file.

5. Environment Variables:

   • Define environment variables in the docker-compose.yml file under the environment key for a service.

6. Volumes and Networks:

   • Define volumes and custom networks in the docker-compose.yml file for services.

This cheat-sheet should help you work with Docker and Docker-Compose effectively and serve as a quick reference for various common tasks in container management and orchestration.