# Traefik & Rancher

A Story of Labels, Services & Containers
{: .subtitle }

![Rancher](../../assets/img/providers/rancher.png)

Attach labels to your services and let Traefik do the rest!

!!! important "This provider is specific to Rancher 1.x."
    
    Rancher 2.x requires Kubernetes and does not have a metadata endpoint of its own for Traefik to query.
    As such, Rancher 2.x users should utilize the [Kubernetes provider](./kubernetes-crd.md) directly.

## Routing Configuration

!!! info "Labels"
    
    - Labels are case insensitive.
    - The complete list of labels can be found in [the reference page](../../reference/dynamic-configuration/rancher.md).

### General

Traefik creates, for each rancher service, a corresponding [service](../services/index.md) and [router](../routers/index.md).

The Service automatically gets a server per container in this rancher service, and the router gets a default rule attached to it, based on the service name.

#### Service definition

--8<-- "content/routing/providers/service-by-label.md"

??? example "Automatic service assignment with labels"

    With labels in a compose file

    ```yaml
    labels:
      - "traefik.http.routers.myproxy.rule=Host(`example.net`)"
      # service myservice gets automatically assigned to router myproxy
      - "traefik.http.services.myservice.loadbalancer.server.port=80"
    ```

??? example "Automatic service creation and assignment with labels"

    With labels in a compose file

    ```yaml
    labels:
      # no service specified or defined and yet one gets automatically created
      # and assigned to router myproxy.
      - "traefik.http.routers.myproxy.rule=Host(`example.net`)"
    ```

### Routers

To update the configuration of the Router automatically attached to the container, add labels starting with `traefik.routers.{name-of-your-choice}.` and followed by the option you want to change.

For example, to change the rule, you could add the label ```traefik.http.routers.my-container.rule=Host(`example.com`)```.

!!! warning "The character `@` is not authorized in the router name `<router_name>`."

??? info "`traefik.http.routers.<router_name>.rule`"
    
    See [rule](../routers/index.md#rule) for more information. 
    
    ```yaml
    - "traefik.http.routers.myrouter.rule=Host(`example.com`)"
    ```

??? info "`traefik.http.routers.<router_name>.entrypoints`"
    
    See [entry points](../routers/index.md#entrypoints) for more information. 
    
    ```yaml
    - "traefik.http.routers.myrouter.entrypoints=ep1,ep2"
    ```

??? info "`traefik.http.routers.<router_name>.middlewares`"
    
    See [middlewares](../routers/index.md#middlewares) and [middlewares overview](../../middlewares/overview.md) for more information. 
    
    ```yaml
    - "traefik.http.routers.myrouter.middlewares=auth,prefix,cb"
    ```

??? info "`traefik.http.routers.<router_name>.service`"
    
    See [rule](../routers/index.md#service) for more information. 
    
    ```yaml
    - "traefik.http.routers.myrouter.service=myservice"
    ```

??? info "`traefik.http.routers.<router_name>.tls`"
    
    See [tls](../routers/index.md#tls) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter>.tls=true"
    ```

??? info "`traefik.http.routers.<router_name>.tls.certresolver`"
    
    See [certResolver](../routers/index.md#certresolver) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter.tls.certresolver=myresolver"
    ```

??? info "`traefik.http.routers.<router_name>.tls.domains[n].main`"
    
    See [domains](../routers/index.md#domains) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter.tls.domains[0].main=example.org"
    ```

??? info "`traefik.http.routers.<router_name>.tls.domains[n].sans`"
    
    See [domains](../routers/index.md#domains) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter.tls.domains[0].sans=test.example.org,dev.example.org"
    ```

??? info "`traefik.http.routers.<router_name>.tls.options`"
    
    See [options](../routers/index.md#options) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter.tls.options=foobar"
    ```

??? info "`traefik.http.routers.<router_name>.priority`"
    
    See [priority](../routers/index.md#priority) for more information.
    
    ```yaml
    - "traefik.http.routers.myrouter.priority=42"
    ```

### Services

To update the configuration of the Service automatically attached to the container,
add labels starting with `traefik.http.services.{name-of-your-choice}.`, followed by the option you want to change.

For example, to change the `passHostHeader` behavior,
you'd add the label `traefik.http.services.{name-of-your-choice}.loadbalancer.passhostheader=false`.

!!! warning "The character `@` is not authorized in the service name `<service_name>`."

??? info "`traefik.http.services.<service_name>.loadbalancer.server.port`"
    
    Registers a port.
    Useful when the container exposes multiples ports.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.server.port=8080"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.server.scheme`"
    
    Overrides the default scheme.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.server.scheme=http"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.passhostheader`"
    
    See [pass Host header](../services/index.md#pass-host-header) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.passhostheader=true"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.headers.<header_name>`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.headers.X-Foo=foobar"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.hostname`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.hostname=example.org"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.interval`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.interval=10"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.path=/foo"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.port`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.port=42"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.scheme`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.scheme=http"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.timeout`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.timeout=10"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.followredirects`"
    
    See [health check](../services/index.md#health-check) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.healthcheck.followredirects=true"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.sticky`"
    
    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.sticky=true"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.httponly`"
    
    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.sticky.cookie.httponly=true"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.name`"
    
    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.sticky.cookie.name=foobar"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.secure`"
    
    See [sticky sessions](../services/index.md#sticky-sessions) for more information.
    
    ```yaml
    - "traefik.http.services.myservice.loadbalancer.sticky.cookie.secure=true"
    ```

??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
    
    See [response forwarding](../services/index.md#response-forwarding) for more information.

    ```yaml
    - "traefik.http.services.myservice.loadbalancer.responseforwarding.flushinterval=10"
    ```

### Middleware

You can declare pieces of middleware using labels starting with `traefik.http.middlewares.{name-of-your-choice}.`, followed by the middleware type/options.

For example, to declare a middleware [`redirectscheme`](../../middlewares/redirectscheme.md) named `my-redirect`, you'd write `traefik.http.middlewares.my-redirect.redirectscheme.scheme: https`.

More information about available middlewares in the dedicated [middlewares section](../../middlewares/overview.md).

!!! warning "The character `@` is not authorized in the middleware name."

??? example "Declaring and Referencing a Middleware"
    
    ```yaml
    # ...
    labels:
      # Declaring a middleware
      - traefik.http.middlewares.my-redirect.redirectscheme.scheme=https
      # Referencing a middleware
      - traefik.http.routers.my-container.middlewares=my-redirect
    ```

!!! warning "Conflicts in Declaration"

    If you declare multiple middleware with the same name but with different parameters, the middleware fails to be declared.

### TCP

You can declare TCP Routers and/or Services using labels.

??? example "Declaring TCP Routers and Services"

    ```yaml
       services:
         my-container:
           # ...
           labels:
             - "traefik.tcp.routers.my-router.rule=HostSNI(`example.com`)"
             - "traefik.tcp.routers.my-router.tls=true"
             - "traefik.tcp.services.my-service.loadbalancer.server.port=4123"
    ```

!!! warning "TCP and HTTP"

    If you declare a TCP Router/Service, it will prevent Traefik from automatically creating an HTTP Router/Service (like it does by default if no TCP Router/Service is defined).
    You can declare both a TCP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).

#### TCP Routers

??? info "`traefik.tcp.routers.<router_name>.entrypoints`"
    
    See [entry points](../routers/index.md#entrypoints_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.entrypoints=ep1,ep2"
    ```

??? info "`traefik.tcp.routers.<router_name>.rule`"
    
    See [rule](../routers/index.md#rule_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.rule=HostSNI(`example.com`)"
    ```

??? info "`traefik.tcp.routers.<router_name>.service`"
    
    See [service](../routers/index.md#services) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.service=myservice"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls`"
    
    See [TLS](../routers/index.md#tls_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls=true"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls.certresolver`"
    
    See [certResolver](../routers/index.md#certresolver_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls.certresolver=myresolver"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].main`"
    
    See [domains](../routers/index.md#domains_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls.domains[0].main=example.org"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].sans`"
    
    See [domains](../routers/index.md#domains_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls.domains[0].sans=test.example.org,dev.example.org"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls.options`"
    
    See [options](../routers/index.md#options_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls.options=mysoptions"
    ```

??? info "`traefik.tcp.routers.<router_name>.tls.passthrough`"
    
    See [TLS](../routers/index.md#tls_1) for more information.
    
    ```yaml
    - "traefik.tcp.routers.mytcprouter.tls.passthrough=true"
    ```

#### TCP Services

??? info "`traefik.tcp.services.<service_name>.loadbalancer.server.port`"
    
    Registers a port of the application.
    
    ```yaml
    - "traefik.tcp.services.mytcpservice.loadbalancer.server.port=423"
    ```

??? info "`traefik.tcp.services.<service_name>.loadbalancer.terminationdelay`"
        
    See [termination delay](../services/index.md#termination-delay) for more information.
    
    ```yaml
    - "traefik.tcp.services.mytcpservice.loadbalancer.terminationdelay=100"
    ```

### UDP

You can declare UDP Routers and/or Services using labels.

??? example "Declaring UDP Routers and Services"

    ```yaml
       services:
         my-container:
           # ...
           labels:
             - "traefik.udp.routers.my-router.entrypoints=udp"
             - "traefik.udp.services.my-service.loadbalancer.server.port=4123"
    ```

!!! warning "UDP and HTTP"

    If you declare a UDP Router/Service, it will prevent Traefik from automatically creating an HTTP Router/Service (like it does by default if no UDP Router/Service is defined).
    You can declare both a UDP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).

#### UDP Routers

??? info "`traefik.udp.routers.<router_name>.entrypoints`"
    
    See [entry points](../routers/index.md#entrypoints_2) for more information.
    
    ```yaml
    - "traefik.udp.routers.myudprouter.entrypoints=ep1,ep2"
    ```

??? info "`traefik.udp.routers.<router_name>.service`"
    
    See [service](../routers/index.md#services_1) for more information.
    
    ```yaml
    - "traefik.udp.routers.myudprouter.service=myservice"
    ```

#### UDP Services

??? info "`traefik.udp.services.<service_name>.loadbalancer.server.port`"
    
    Registers a port of the application.
    
    ```yaml
    - "traefik.udp.services.myudpservice.loadbalancer.server.port=423"
    ```

### Specific Provider Options

#### `traefik.enable`

```yaml
- "traefik.enable=true"
```

You can tell Traefik to consider (or not) the container by setting `traefik.enable` to true or false.

This option overrides the value of `exposedByDefault`.

#### Port Lookup

Traefik is capable of detecting the port to use, by following the default rancher flow.
That means, if you just expose lets say port `:1337` on the rancher ui, traefik will pick up this port and use it.