Day 23: Docker - Use of Docker Command Line
Experienced Senior DevOps Engineer with a passion for optimizing software development and delivery processes. Excels in designing and implementing CI/CD pipelines, automating infrastructure, and optimizing cloud architectures. Proficient in a wide range of DevOps tools such as Docker, Kubernetes, Jenkins, Ansible, Git, and AWS services. Strong collaborator, adept at fostering cross-functional teamwork and continuous improvement. Thrives in dynamic environments, utilizing problem-solving skills to overcome complex challenges. Dedicated to delivering high-quality software products on time and within budget.
To list available commands, either run docker with no parameters or execute docker help:
The base command for the Docker CLI.
Container Management:
# Create a new container
docker create IMAGE_NAME
# Execute a command in a running container
docker exec -it CONTAINER COMMAND
# Pause all processes within one or more containers
docker pause CONTAINER
# Unpause all processes within one or more containers
docker unpause CONTAINER
# Start one or more stopped containers
docker start CONTAINER
# Stop one or more running containers
docker stop CONTAINER
# Restart one or more containers
docker restart CONTAINER
# Remove one or more containers
docker rm CONTAINER
# Kill one or more running containers
docker kill CONTAINER
# Update configuration of one or more containers
docker update CONTAINER
# Attach local standard input, output, and error streams to a running container
docker attach CONTAINER
# Display the running processes of a container
docker top CONTAINER
# Fetch the logs of a container
docker logs CONTAINER
# List port mappings or a specific mapping for the container
docker port CONTAINER
# Display a live stream of container(s) resource usage statistics
docker stats CONTAINER
# Inspect changes to files or directories on a container’s filesystem
docker diff CONTAINER
# Copy files/folders between a container and the local filesystem
docker cp SRC_PATH CONTAINER:DEST_PATH
docker cp CONTAINER:SRC_PATH DEST_PATH
Image Management:
# Build an image from a Dockerfile
docker build -t IMAGE_NAME:TAG PATH
# Create a new image from a container’s changes
docker commit CONTAINER NEW_IMAGE_NAME
# List images
docker images
# Show the history of an image
docker history IMAGE_NAME
# Manage images
docker image COMMAND
# Import the contents from a tarball to create a filesystem image
docker import FILENAME.tar NEW_IMAGE_NAME
# Load an image from a tar archive or STDIN
docker load < FILENAME.tar
# Upload an image to a registry
docker push IMAGE_NAME
# Remove one or more images
docker rmi IMAGE_NAME
# Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
docker tag SOURCE_IMAGE TARGET_IMAGE
# Save one or more images to a tar archive
docker save IMAGE_NAME > FILENAME.tar
# Search Docker Hub for images
docker search IMAGE_NAME
Registry and Login:
# Pull an image from a registry
docker pull IMAGE_NAME
# Log in to a registry
docker login [OPTIONS] [SERVER]
# Log out from a registry
docker logout [SERVER]
System Information:
# Display system-wide information
docker info
# Return low-level information on Docker objects
docker inspect OBJECT
# Display the Docker version information
docker version
# Manage Docker
docker system COMMAND
Network and Volume Management:
# Create a new network
docker network create NETWORK_NAME
# Remove one or more networks
docker network rm NETWORK
# Connect a container to a network
docker network connect NETWORK CONTAINER
# Disconnect a container from a network
docker network disconnect NETWORK CONTAINER
# List networks
docker network ls
# Display detailed information about a network
docker network inspect NETWORK
# Create a new volume
docker volume create VOLUME_NAME
# Remove one or more volumes
docker volume rm VOLUME
# List volumes
docker volume ls
# Display detailed information about a volume
docker volume inspect VOLUME
# Prune unused volumes
docker volume prune
Swarm and Service Management:
# Manage Swarm
docker swarm COMMAND
# Manage Swarm nodes
docker node COMMAND
# Manage Swarm services
docker service COMMAND
# Manage Swarm stacks
docker stack COMMAND
Other Commands:
# Manage builds
docker builder COMMAND
# Manage checkpoints
docker checkpoint COMMAND
# Manage contexts
docker context COMMAND
# Create and run a new container from an image
docker run [OPTIONS] IMAGE_NAME
# Display real-time events from the server
docker events
# Export a container’s filesystem as a tar archive
docker export CONTAINER > FILENAME.tar
# Manage Docker image manifests and manifest lists
docker manifest COMMAND
# Manage plugins
docker plugin COMMAND
# Show the Docker version information
docker version
# Block until one or more containers stop, then print their exit codes
docker wait CONTAINER
Workflow Example:
Step-by-step execution flow of common Docker commands, along with examples:
1. Pull an Image: Pull an image from a registry (e.g., Docker Hub) to your local system.
docker pull ubuntu:20.04
2. Create and Run a Container: Create a new container from the pulled image and run it.
docker run -d --name my-container ubuntu:20.04
3. Execute Commands in the Container: Execute commands inside the running container.
docker exec -it my-container bash
4. Inspect Container Details: Get detailed information about the container.
docker inspect my-container
5. Copy Files Between Host and Container: Copy files/folders between the host and the container.
docker cp local-file.txt my-container:/app/
6. Display Container Logs: View the logs of a container.
docker logs my-container
7. Stop and Restart Container: Stop and then restart the container.
docker stop my-container
docker start my-container
8. List Running Containers: List all the currently running containers.
docker ps
9. Remove Container: Remove a container.
docker rm my-container
10. Create and Manage Volumes: Create and manage data volumes for persistent storage.
docker volume create my-volume
docker volume ls
docker volume inspect my-volume
docker volume rm my-volume
11. Create and Manage Networks: Create and manage networks for container communication.
docker network create my-network
docker network ls
docker network inspect my-network
docker network rm my-network
12. Build a Custom Image: Build a Docker image from a Dockerfile.
docker build -t my-custom-image:latest .
13. Manage Images: List, inspect, and remove images.
docker images
docker image inspect my-custom-image:latest
docker rmi my-custom-image:latest
14. Push an Image to a Registry: Upload a custom image to a registry (e.g., Docker Hub).
docker push my-custom-image:latest
These steps cover a typical workflow of using Docker commands to pull images, create and manage containers, work with volumes and networks, build custom images, and interact with images.
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