5.8 KiB

Raw Blame History

Compose CLI reference

Most Docker Compose commands are run against one or more services. If the service is not specified, the command will apply to all services.

For full usage information, run docker-compose [COMMAND] --help.

Commands

build

Builds or rebuilds services.

Services are built once and then tagged as project_service, e.g., composetest_db. If you change a service's Dockerfile or the contents of its build directory, run docker-compose build to rebuild it.

help

Displays help and usage instructions for a command.

kill

Forces running containers to stop by sending a SIGKILL signal. Optionally the signal can be passed, for example:

$ docker-compose kill -s SIGINT

logs

Displays log output from services.

port

Prints the public port for a port binding

ps

Lists containers.

pull

Pulls service images.

restart

Restarts services.

rm

Removes stopped service containers.

run

Runs a one-off command on a service.

For example,

$ docker-compose run web python manage.py shell

will start the web service and then run manage.py shell in python. Note that by default, linked services will also be started, unless they are already running.

One-off commands are started in new containers with the same configuration as a normal container for that service, so volumes, links, etc will all be created as expected. When using run, there are two differences from bringing up a container normally:

the command will be overridden with the one specified. So, if you run docker-compose run web bash, the container's web command (which could default to, e.g., python app.py) will be overridden to bash
by default no ports will be created in case they collide with already opened ports.

Links are also created between one-off commands and the other containers which are part of that service. So, for example, you could run:

$ docker-compose run db psql -h db -U docker

This would open up an interactive PostgreSQL shell for the linked db container (which would get created or started as needed).

If you do not want linked containers to start when running the one-off command, specify the --no-deps flag:

$ docker-compose run --no-deps web python manage.py shell

Similarly, if you do want the service's ports to be created and mapped to the host, specify the --service-ports flag:

$ docker-compose run --service-ports web python manage.py shell

scale

Sets the number of containers to run for a service.

Numbers are specified as arguments in the form service=num. For example:

$ docker-compose scale web=2 worker=3

start

Starts existing containers for a service.

stop

Stops running containers without removing them. They can be started again with docker-compose start.

up

Builds, (re)creates, starts, and attaches to containers for a service.

Linked services will be started, unless they are already running.

By default, docker-compose up will aggregate the output of each container and, when it exits, all containers will be stopped. Running docker-compose up -d, will start the containers in the background and leave them running.

By default, if there are existing containers for a service, docker-compose up will stop and recreate them (preserving mounted volumes with volumes-from), so that changes in docker-compose.yml are picked up. If you do not want containers stopped and recreated, use docker-compose up --no-recreate. This will still start any stopped containers, if needed.

Options

--verbose

Shows more output

-v, --version

Prints version and exits

-f, --file FILE

Specify what file to read configuration from. If not provided, Compose will look for docker-compose.yml in the current working directory, and then each parent directory successively, until found.

Use a - as the filename to read configuration from stdin. When stdin is used all paths in the configuration will be relative to the current working directory.

-p, --project-name NAME

Specifies an alternate project name (default: current directory name)

Environment Variables

Several environment variables are available for you to configure Compose's behaviour.

Variables starting with DOCKER_ are the same as those used to configure the Docker command-line client. If you're using boot2docker, eval "$(boot2docker shellinit)" will set them to their correct values.

COMPOSE_PROJECT_NAME

Sets the project name, which is prepended to the name of every container started by Compose. Defaults to the basename of the current working directory.

COMPOSE_FILE