Docker cheatsheet

Docker-cheatsheet.md

Images

Build a Docker image and tag it using the Dockerfile in the current folder

$ docker build -t {my_tag_name} --build-arg SSH_KEY="`cat ~/.ssh/id_rsa`" --no-cache .

List images

$ docker image ls

or

$ docker images

• List all images including intermediate ones

$ docker images -a

Prune dangling images

$ docker image prune

• Options
  • -a prune not only dangling but also currently un-referenced images
  • --filter "until=12h" only remove images created before 12h
  • --filter "label=<key>" or --filter "label!=<key>"

Remove image(s)

$ docker image rm {image ID} {image ID2}

or

$ docker rmi {image ID} {image ID2}

Containers

List Docker containers

• List running containers

$ docker ps

• useful flages

  • -a List all containers both running and stopped
  • -q quiet (only shows the container IDs)

• New syntax to list containers

$ docker container ls

Run: Build and start a container from an image

$ docker run {Image name}

• Options (goes before image name)
  • --name name the container
  • --rm remove the container when it exits
  • -it sh interactive and use shell in the container
  • -d detached mode

Start Docker container(s)

$ docker start {container ID}

Stop Docker containers

• Stop specific containers

$ docker stop {Container ID 1} {Container ID 2}

or

$ docker kill {Container ID}

• Stop all running containers

$ docker stop $(docker ps -aq)

Remove Docker Containers

• Remove specific containers

$ docker container rm {Container ID 1} {Container ID 2} ...

• List all stopped containers

$ docker container ls -a --filter status=exited --filter status=created

• Remove all containers (the running ones will not be stopped and give an error)

$ docker rm $(docker ps -aq)

Execute commands inside a container

• Execute shell script in a Node container

$ docker exec -it {container ID} sh

• Execute the psql shell inside a postgres docker container

$ docker exec -it {container ID} psql -U postgres

Show logs of a running container

$ docker logs {container ID} -f

• -f follow the output so that the logs keep coming

Volumes

List Docker Volumes

$ docker volume ls

Remove a volume (the container using the volume has to be removed first)

$ docker volume rm {VOLUME NAME}

Prune unused volumes

$ docker volume prune

Networks

List Docker Networks

$ docker network ls

Remove networks

• Remove a specific network

$ docker network rm {network id}

• Remove unused network

$ docker network prune

• Remove with filter

$ docker network prune -a --filter "until=12h"

Remove all unused objects

$ docker system prune -f