# Rancher backend

Træfik can be configured to use Rancher as a backend configuration:


```toml
################################################################
# Rancher configuration backend
################################################################

# Enable Rancher configuration backend
#
# Optional
#
[rancher]

# Default domain used.
# Can be overridden by setting the "traefik.domain" label on an service.
#
# Required
#
domain = "rancher.localhost"

# Enable watch Rancher changes
#
# Optional
# Default: true
#
Watch = true

# Polling interval (in seconds)
#
# Optional
#
RefreshSeconds = 15

# Expose Rancher services by default in traefik
#
# Optional
# Default: true
#
ExposedByDefault = false

# Filter services with unhealthy states and inactive states
#
# Optional
# Default: false
#
EnableServiceHealthFilter = true
```

```toml
# Enable Rancher metadata service configuration backend instead of the API
# configuration backend
#
# Optional
# Default: false
#
[rancher.metadata]

# Poll the Rancher metadata service for changes every `rancher.RefreshSeconds`
# NOTE: this is less accurate than the default long polling technique which
# will provide near instantaneous updates to Traefik
#
# Optional
# Default: false
#
IntervalPoll = true

# Prefix used for accessing the Rancher metadata service
#
# Optional
# Default: "/latest"
#
Prefix = "/2016-07-29"
```

```toml
# Enable Rancher API configuration backend
#
# Optional
# Default: true
#
[rancher.api]

# Endpoint to use when connecting to the Rancher API
#
# Required
Endpoint = "http://rancherserver.example.com/v1"

# AccessKey to use when connecting to the Rancher API
#
# Required
AccessKey = "XXXXXXXXXXXXXXXXXXXX"

# SecretKey to use when connecting to the Rancher API
#
# Required
SecretKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
```

If Traefik needs access to the Rancher API, you need to set the `endpoint`, `accesskey` and `secretkey` parameters. 

To enable traefik to fetch information about the Environment it's deployed in only, you need to create an `Environment API Key`.
This can be found within the API Key advanced options.

Labels can be used on task containers to override default behaviour:

- `traefik.protocol=https`: override the default `http` protocol
- `traefik.weight=10`: assign this weight to the container
- `traefik.enable=false`: disable this container in Træfik
- `traefik.frontend.rule=Host:test.traefik.io`: override the default frontend rule (Default: `Host:{containerName}.{domain}`).
- `traefik.frontend.passHostHeader=true`: forward client `Host` header to the backend.
- `traefik.frontend.priority=10`: override default frontend priority
- `traefik.frontend.entryPoints=http,https`: assign this frontend to entry points `http` and `https`. Overrides `defaultEntryPoints`.
- `traefik.frontend.auth.basic=test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/,test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0`: Sets basic authentication for that frontend with the usernames and passwords test:test and test2:test2, respectively