#90daysofdevops #20
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Docker CLI
Command | Description |
docker info | Display system wide information related to docker installation (e.g. docker registry) |
docker images | Check the list of docker images available locally |
docker run container_name:tag | Run a docker container. |
docker run container_name:tag command | Start the docker container and run the command inside it. |
docker run -it container_name:tag | Start the docker container in interactive (-i) mode with TTY (-t). |
docker exec -it container_id sh | Get the TTY shell inside the container |
docker run -d container_name:tag | Run the container in detached mode (-d) i.e. background |
docker run --rm container_name:tag | Remove the containers from the file system on exit |
docker run --name container_name busybox:1.24 | Run the container and assign it a name |
docker run -e ENV_VAR container_name:tag | Start a container and pass an environment variable |
docker run --user 1001:1001 container_name:tag | Start a container with non-root user |
docker run -p host_port:container_port container_name:tag | Expose the container port |
docker run -itd --pids-limit 6 container_name | Enforce cgroup settings on the container. For e.g. create a container which can have maximum of 6 pids |
docker ps | Check the list of docker containers running in background |
docker ps -a | Get the list of all containers including the stopped ones |
docker ps -aq -f status=exited | List all exited containers |
docker ps -aq --no-trunc -f status=exited | xargs docker rm | Remove the stopped containers |
docker stop $(docker ps -aq) | Stop all the running containers |
docker rm container_name | Remove the container from the file system |
docker rm $(docker ps -aq) | Remove all the running containers from file system |
docker rmi image-id | Remove an image from the file system |
docker rmi $(docker images) | Remove all the images from the file system |
docker system prune | Delete the unused dangling resources (eg. images, containers, volumes) |
docker rename old_name new_name | Rename the container |
docker inspect container_id | Get detailed information about the container |
docker inspect container_id | grep MergedDir | Locate the path of container's filesystem on the host. The path will be similar to /var/lib/docker/overlay2//merged |
docker logs container_id | Get logs of running container |
docker history container_name:tag | List of the layers of images which makes the container |
docker stop -t 20 container_id | Wait for 20 sec before killing the container |
docker volume create volume_name | Create a docker volume |
docker volume ls | List all the existing volumes |
docker volume inspect volume_name | Find the mount point of the volume on host |
docker run -v /var/host:/var/docker | Mount the host volume "/var/host" to the directory "/var/docker" of the container |
docker build -t tag_name . | Build the docker image using Dockerfile (in the current directory, denoted by .) and assign it a tag name |
docker build -t repository_name/container_name . --no-cache=true | Building docker image using commit. Don't use cache while building new image. |
docker commit container_id repository:tag | Commit the changes to docker registry. Default docker registry is dockerhub |
docker stats | Check the status of the container. (this will show pid). This will increase if more number of processes are created inside container |
docker save image_name > image.tar | Save or export the image in tar format |
docker -H tcp://10.10.10.10:2375 ps | Specify the host (-H) and mode (tcp) to access the docker daemon and run the command. |
Docker Compose CLI
docker-compose up -d | use the docker-compose.yml to automate the build and start of container |
docker-compose start -d | use the docker-compose.yml to automate the build and start of container |
docker-compose ps | check the status of the container managed by docker-compose |
docker-compose logs | output the logs for compose managed containers |
docker-compose logs -f | Follow the logs |
docker-compose logs | get the log of the particular container |
docker-compose stop | stop all running containers without removing them |
docker-compose rm | remove all the containers |
docker-compose build | rebuild the images created from dockerfile |