Nicolas De LoofandClaude Opus 4.8
b45991bf47
servicesUsingVolume only matched services mounting the volume directly, so a service reaching it through volumes_from was not stopped/removed before RemoveVolume. Docker materializes the inherited mount on the consumer's container, so its removal would fail with "volume in use". Compute the transitive volumes_from closure so every container referencing the volume is removed first. (network_mode/ipc/pid: service:x share namespaces, not mounts, and are intentionally excluded.) Also reassign the result of Labels.Add in createVolume: it mutates in place only when the map is non-nil, so discarding the return would drop the config-hash label for a volume with no CustomLabels. Addresses review feedback: documents why observed.Containers is cleared without touching the observedContainersByService hashing snapshot, and strengthens the cascade tests to assert the full plan ordering. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]> Signed-off-by: Nicolas De Loof <[email protected]>
Table of Contents
Docker Compose
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.
Note
: About Docker Swarm Docker Swarm used to rely on the legacy compose file format but did not adopt the compose specification so is missing some of the recent enhancements in the compose syntax. After acquisition by Mirantis swarm isn't maintained by Docker Inc, and as such some Docker Compose features aren't accessible to swarm users.
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
compose.yamlso 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.