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40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
# Services
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Drone uses the `compose` section of the `.drone.yml` to specify supporting containers (ie service containers) that should be started and linked to your build container. The `compose` section of the `.drone.yml` is modeled after `docker-compose`:
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```
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compose:
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[container_name:]
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image: [image_name]
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[options]
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```
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Example configuration that composes a Postgres and Redis container:
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```yaml
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compose:
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cache:
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image: redis
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database:
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image: postgres
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environment:
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- POSTGRES_USER=postgres
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- POSTGRES_PASSWORD=mysecretpassword
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```
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## Service linking
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Service containers share the same network as the build container (using `--net=<container>`). This means that you can access your service container using `localhost` or `127.0.0.1`.
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## Service options
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The service container configuration options:
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* `image` - any valid Docker image name
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* `pull` - if true, will always attempt to pull the latest image
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* `environment` - list of environment variables, declared in `name=value` format
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* `privileged` - if true, runs the container with extended privileges [1]
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* `volumes` - list of bind mounted volumes on the host machine [1]
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* `net` - sets the container [network mode](https://docs.docker.com/articles/networking/#container-networking) [1]
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[1] Some build options are disabled for security reasons, including `volumes`, `privileged` and `net`. To enable these options, a system administrator must white-list your repository as trusted. This can be done via the repository settings screen.
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