407a0d5b53
If running `up` in foreground mode (i.e. not `-d`), when exiting via `Ctrl-C`, Compose stops all the services it launched directly as part of that `up` command. In one of the E2E tests (`TestUpDependenciesNotStopped`), this was occasionally flaking because the stop behavior was racy: the return might not block on the stop operation because it gets added to the error group in a goroutine. As a result, it was possible for no services to get terminated on exit. There were a few other related pieces here that I uncovered and tried to fix while stressing this. For example, the printer could cause a deadlock if an event was sent to it after it stopped. Also, an error group wasn't really appropriate here; each goroutine is a different operation for printing, signal-handling, etc. If one part fails, we don't actually want printing to stop, for example. This has been switched to a `multierror.Group`, which has the same API but coalesces errors instead of canceling a context the moment the first one fails and returning that single error. Signed-off-by: Milas Bowman <milas.bowman@docker.com>
Table of Contents
- Docker Compose v2
- About update and backward compatibility
- Where to get Docker Compose
- Quick Start
- Contributing
- Legacy
Docker Compose v2
Docker Compose is a tool for running multi-container applications on Docker
defined using the Compose file format.
A Compose file is used to define how one or more containers that make up
your application are configured.
Once you have a Compose file, you can create and start your application with a
single command: docker compose up.
Where to get Docker Compose
Windows and macOS
Docker Compose is included in Docker Desktop for Windows and macOS.
Linux
You can download Docker Compose binaries from the release page on this repository.
Rename the relevant binary for your OS to docker-compose and copy it to $HOME/.docker/cli-plugins
Or copy it into one of these folders to install it system-wide:
/usr/local/lib/docker/cli-pluginsOR/usr/local/libexec/docker/cli-plugins/usr/lib/docker/cli-pluginsOR/usr/libexec/docker/cli-plugins
(might require making the downloaded file executable with chmod +x)
Quick Start
Using Docker Compose is a three-step process:
- Define your app's environment with a
Dockerfileso it can be reproduced anywhere. - Define the services that make up your app in
docker-compose.ymlso they can be run together in an isolated environment. - Lastly, run
docker compose upand Compose will start and run your entire app.
A Compose file looks like this:
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
redis:
image: redis
Contributing
Want to help develop Docker Compose? Check out our contributing documentation.
If you find an issue, please report it on the issue tracker.
Legacy
The Python version of Compose is available under the v1 branch.