docker.md

title	category	layout
Docker CLI	Devops	default-ad

Manage images

Create an image from a Dockerfile:

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

Run a command in an image:

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

Manage containers

Create a container from an image:

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

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

Run in a container:

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

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

Start/stop a container:

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

docker stop [options] CONTAINER

Manage containers:

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

Managing

Manage images:

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

$ docker images -a   # also show intermediate

Delete images:

docker rmi b750fe78269d

Resources

• http://www.docker.io/gettingstarted/