13 KiB
Traefik & Rancher
A Story of Labels, Services & Containers {: .subtitle }
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 and router.
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(`foo.com`)"
# 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(`foo.com`)"
```
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(`mydomain.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(`mydomain.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=foobar.com"
```
??? 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.foobar.com,dev.foobar.com"
```
??? 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=foobar.com"
```
??? 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.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 named my-redirect, you'd write traefik.http.middlewares.my-redirect.redirectscheme.scheme: https.
More information about available middlewares in the dedicated middlewares section.
!!! 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(`my-host.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(`myhost.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=foobar.com"
```
??? 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.foobar.com,dev.foobar.com"
```
??? 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"
```
Specific Provider Options
traefik.enable
- "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.