cheatsheets/docker.md

title	category	layout
Docker CLI	Devops	2017/sheet

Manage images

docker build

docker build [options] .
  -t "app/container_name"    # name

Create an image from a Dockerfile.

docker run

docker run [options] IMAGE
  # see `docker create` for options

Run a command in an image.

Manage containers

docker create

docker create [options] IMAGE
  -a, --attach               # attach stdout/err
  -i, --interactive          # attach stdin (interactive)
  -t, --tty                  # pseudo-tty
      --name NAME            # name your image
  -p, --publish 5000:5000    # port map
      --expose 5432          # expose a port to linked containers
  -P, --publish-all          # publish all ports
      --link container:alias # linking
  -v, --volume `pwd`:/app    # mount (absolute paths needed)
  -e, --env NAME=hello       # env vars

Example

$ docker create --name app_redis_1 \
  --expose 6379 \
  redis:3.0.2

Create a container from an image.

docker exec

docker exec [options] CONTAINER COMMAND
  -d, --detach        # run in background
  -i, --interactive   # stdin
  -t, --tty           # interactive

Example

$ docker exec app_web_1 tail logs/development.log
$ docker exec -t -i app_web_1 rails c

Run commands in a container.

docker start

docker start [options] CONTAINER
  -a, --attach        # attach stdout/err
  -i, --interactive   # attach stdin

docker stop [options] CONTAINER

Start/stop a container.

docker ps

$ docker ps
$ docker ps -a
$ docker kill $ID

Manage containers using ps/kill.

Images

docker images

$ docker images
  REPOSITORY   TAG        ID
  ubuntu       12.10      b750fe78269d
  me/myapp     latest     7b2431a8d968

$ docker images -a   # also show intermediate

Manages images.

docker rmi

docker rmi b750fe78269d

Deletes images.

Clean up

clean All

docker system prune

will clean up any resources — images, containers, volumes, and networks — that are dangling (not associated with a container)

docker system prune -a

additionally remove any stopped containers and all unused images (not just dangling images)

docker containers

docker stop $(docker ps -a -q)

stop all the running containers.

docker rm $(docker ps -a -q)

delete all the containers

Images

docker rmi $(docker images -a -q)

delte all the images

Volumes

docker volume prune

delete all the volumes

Also see

• Getting Started (docker.io)