traefik/docs/configuration/backends/rancher.md

Rancher Backend

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

Global Configuration

################################################################
# Rancher configuration backend
################################################################

# Enable Rancher configuration backend.
[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
# Default: 15
#
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

To enable constraints see backend-specific constraints section.

Rancher Metadata Service

# 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"

Rancher API

# 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"

!!! note 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.

Add these labels to traefik docker deployment to autogenerated these values:
```
io.rancher.container.agent.role: environment
io.rancher.container.create_agent: true
```

Labels: overriding default behaviour

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

Label	Description
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=EXPR	Sets basic authentication for that frontend in CSV format: User:Hash,User:Hash.
traefik.frontend.redirect.entryPoint=https	Enables Redirect to another entryPoint for that frontend (e.g. HTTPS)
traefik.frontend.redirect.regex: ^http://localhost/(.*)	Redirect to another URL for that frontend. Must be set with traefik.frontend.redirect.replacement.
traefik.frontend.redirect.replacement: http://mydomain/$1	Redirect to another URL for that frontend. Must be set with traefik.frontend.redirect.regex.
traefik.backend.circuitbreaker.expression=NetworkErrorRatio() > 0.5	Create a circuit breaker to be used against the backend
traefik.backend.loadbalancer.method=drr	Override the default wrr load balancer algorithm
traefik.backend.loadbalancer.stickiness=true	Enable backend sticky sessions
traefik.backend.loadbalancer.stickiness.cookieName=NAME	Manually set the cookie name for sticky sessions
traefik.backend.loadbalancer.sticky=true	Enable backend sticky sessions (DEPRECATED)