What it does
Docker Compose runs applications whose related containers are described in a Compose file. The file records how the services are configured, and the `docker compose up` command creates and starts the application. Compose is useful for repeatable local development and for container-based test jobs inside CI, but it is not itself a hosted pipeline scheduler. The official project distributes it as a Docker CLI plugin and includes it with Docker Desktop on Windows and macOS.
Describe the stack once
A Compose file captures the configuration for one or more containers that form an application. After the file exists, the project README's quick-start path is to run docker compose up; Compose starts the defined services together. For a local example, a web service and its database can share one file so a developer or CI job can recreate the same dependencies without manually starting each container. On Windows and macOS, the project README says Compose is included with Docker Desktop. On Linux, the repository documents installing the Compose binary as a Docker CLI plugin, either in a per-user plugin directory or a system-wide plugin directory. That makes Compose a small infrastructure layer for development and CI, while a separate runner still decides when builds or tests execute. ### Know which orchestration path you are using
Compose is distinct from Docker Desktop and the Docker Engine, even though Desktop bundles it on two platforms. Its file format is also not the legacy Docker Swarm format: the README warns that Swarm lacks some newer Compose syntax enhancements. Teams adopting Compose files should use Compose's own runtime and avoid assuming every field has identical behavior in Swarm. The repository's license is Apache License 2.0.
Strengths
- A single Compose file describes how the containers in an application are configured.
- The documented `docker compose up` command starts the declared application services together.
- The project provides a Docker Desktop-bundled path for Windows and macOS and a plugin installation path for Linux.
Watch out for
- Compose supplies container orchestration for an application but not a CI pipeline scheduler or hosted build service.
- The project warns that Docker Swarm does not support some recent enhancements to the Compose file format.
Best for
- Starting an application's dependent containers consistently during local development.
- Providing service dependencies for container-based integration tests in an existing CI runner.
- Keeping a multi-container development stack in a human-readable configuration file.
Sources
- Docker Compose - docker/compose README (Oct 25, 2026)
- compose/LICENSE at main - docker/compose - GitHub (Oct 25, 2026)