Commands
Docker CLI
Container Status
docker ps
List all the running containers in a machine with details like container id, command being executed, start time etc.
docker ps --all
List all the containers ever ran on a machine.
Container Creation
docker run <image-name>
Creates a docker container with default command as per image.
docker run <image-name> <command>
Overrides default command of an image.
docker run -it <image-name> <command>
Runs a container and attaches a psuedo terminal to the container, replacing the default command in the image. -i tag attaches STDIN to the container, when not specified, it only attaches STDOUT of the container.
docker run -p <port of host>:<port of container> <image-name>
Runs the docker image with port mapping.
docker create <image-name>
Create a container from an image.
docker start <container-id>
Start a container with the given container id.
docker start -a <container-id>
Start a container with the given container id and attach the STDOUT/STDERR and also can forward the signals.
docker exec -it <container-id> <command>
Execute an additional command inside a container, -i opens an STDIN of the command and -t allocates a pseudo terminal (TTY), <command> could also be shell like sh, zsh, bash etc which will open a shell directly into the container.
Container/s Stop
docker stop <container-id>
Stops the running docker container, by sending a signal SIGTERM and gracefully terminate the container, if the container does not stop in 10 second, docker falls back to docker kill like behavior.
docker kill <container-id>
Kills the running docker container, by sneding a signal SIGKILL and abruptly terminate the container.
docker system prune
Remove all the stopped containers, unused network, dangling images and build cache.
Container Debugging
docker logs <container-id>
Prints out all the logs emitted by the container.
docker attach <container-id>
Attaches STDIN, STDOUT, STDERR of the running container to the terminal.
Container Volume
docker run -v <volume in the host>:<volume in the container> <image-id>
This command will set up a volume reference in the host to that of a container.
docker run -v <volume in the container> <image-id>
This command will set up a volume reference but not map to any volume in the host and thereby not overriding the contents of the same folder in the container.
Image Creation
docker build <docker-file-path>
Builds a docker image from a given docker file. By default this command will look for a file named Dockerfile.
DOCKER_BUILDKIT=0 docker build <docker-file-path>
Builds a docker image from a given docker file while docker BuildKit is disabled.
docker build -t <tag-name> <docker-file-path>
Builds a docker image from a docker file and adds a tag of the standard form docker-id/project-name:version.
docker tag <container-id> <tag-name>
Creates a tag for a given container id.
docker commit -c 'CMD [ "<command>" ]' <container-id>
Creates a docker image from a container and adds a default command.
docker commit -c "CMD '<command>'" <container-id>
(only windows) Creates a docker image from a container and adds a default command.
Docker Compose
Container Status
docker compose ps
List all the running containers in a compose project with details like container id, command being executed, start time etc.
Container Operations
docker-compose up
Creates and starts containers defined in docker-compose.yml file located in the current working directory and also sets up a default network and join the containers in docker-compose together.
docker-compose up --build
Builds images before running them, typically used to perform a rebuild.
docker-compose up --d
Run containers in background.
docker-compose down
Stops running container and removes them.
Docker Hub
docker login -u <username> -p <password>
To login to docker hub through command line
docker login -u <username> --password-stdin <password>
To login to docker hub through command line, password will be obtained from standard input
docker push <image-id>/<image-tag>
To push image to docker hub
Reference
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