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Add a note on how to add label to a docker compose file

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Julien Maitrehenry 2018-01-04 04:34:03 -05:00 committed by Traefiker
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20
docs/configuration/backends/docker.md
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@ -145,6 +145,20 @@ To enable constraints see [backend-specific constraints section](/configuration/
## Labels: overriding default behaviour
!!! note
If you use a compose file, labels should be defined in the `deploy` part of your service.
This behavior is only enabled for docker-compose version 3+ ([Compose file reference](https://docs.docker.com/compose/compose-file/#labels-1)).
```yaml
version: "3"
services:
whoami:
deploy:
labels:
traefik.docker.network: traefik
```
### On Containers
Labels can be used on containers to override default behaviour.
@ -224,11 +238,13 @@ Services labels can be used for overriding default behaviour
!!! note
if a label is defined both as a `container label` and a `service label` (for example `traefik.<service-name>.port=PORT` and `traefik.port=PORT` ), the `service label` is used to defined the `<service-name>` property (`port` in the example).
If a label is defined both as a `container label` and a `service label` (for example `traefik.<service-name>.port=PORT` and `traefik.port=PORT` ), the `service label` is used to defined the `<service-name>` property (`port` in the example).
It's possible to mix `container labels` and `service labels`, in this case `container labels` are used as default value for missing `service labels` but no frontends are going to be created with the `container labels`.
More details in this [example](/user-guide/docker-and-lets-encrypt/#labels).
!!! warning
when running inside a container, Træfik will need network access through:
When running inside a container, Træfik will need network access through:
`docker network connect <network> <traefik-container>`