507 lines
16 KiB
Markdown
507 lines
16 KiB
Markdown
# Traefik & Rancher
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A Story of Labels, Services & Containers
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{: .subtitle }
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Attach labels to your services and let Traefik do the rest!
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!!! important "This provider is specific to Rancher 1.x."
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Rancher 2.x requires Kubernetes and does not have a metadata endpoint of its own for Traefik to query.
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As such, Rancher 2.x users should utilize the [Kubernetes provider](./kubernetes-crd.md) directly.
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## Routing Configuration
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!!! info "Labels"
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- Labels are case insensitive.
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- The complete list of labels can be found in [the reference page](../../reference/dynamic-configuration/rancher.md).
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### General
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Traefik creates, for each rancher service, a corresponding [service](../services/index.md) and [router](../routers/index.md).
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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.
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#### Service definition
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--8<-- "content/routing/providers/service-by-label.md"
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??? example "Automatic service assignment with labels"
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With labels in a compose file
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```yaml
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labels:
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- "traefik.http.routers.myproxy.rule=Host(`example.net`)"
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# service myservice gets automatically assigned to router myproxy
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- "traefik.http.services.myservice.loadbalancer.server.port=80"
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```
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??? example "Automatic service creation and assignment with labels"
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With labels in a compose file
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```yaml
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labels:
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# no service specified or defined and yet one gets automatically created
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# and assigned to router myproxy.
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- "traefik.http.routers.myproxy.rule=Host(`example.net`)"
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```
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### Routers
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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.
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For example, to change the rule, you could add the label ```traefik.http.routers.my-container.rule=Host(`example.com`)```.
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!!! warning "The character `@` is not authorized in the router name `<router_name>`."
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??? info "`traefik.http.routers.<router_name>.rule`"
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See [rule](../routers/index.md#rule) for more information.
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```yaml
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- "traefik.http.routers.myrouter.rule=Host(`example.com`)"
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```
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??? info "`traefik.http.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints) for more information.
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```yaml
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- "traefik.http.routers.myrouter.entrypoints=ep1,ep2"
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```
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??? info "`traefik.http.routers.<router_name>.middlewares`"
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See [middlewares](../routers/index.md#middlewares) and [middlewares overview](../../middlewares/overview.md) for more information.
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```yaml
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- "traefik.http.routers.myrouter.middlewares=auth,prefix,cb"
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```
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??? info "`traefik.http.routers.<router_name>.service`"
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See [rule](../routers/index.md#service) for more information.
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```yaml
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- "traefik.http.routers.myrouter.service=myservice"
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```
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??? info "`traefik.http.routers.<router_name>.tls`"
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See [tls](../routers/index.md#tls) for more information.
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```yaml
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- "traefik.http.routers.myrouter>.tls=true"
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```
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??? info "`traefik.http.routers.<router_name>.tls.certresolver`"
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See [certResolver](../routers/index.md#certresolver) for more information.
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```yaml
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- "traefik.http.routers.myrouter.tls.certresolver=myresolver"
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```
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??? info "`traefik.http.routers.<router_name>.tls.domains[n].main`"
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See [domains](../routers/index.md#domains) for more information.
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```yaml
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- "traefik.http.routers.myrouter.tls.domains[0].main=example.org"
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```
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??? info "`traefik.http.routers.<router_name>.tls.domains[n].sans`"
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See [domains](../routers/index.md#domains) for more information.
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```yaml
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- "traefik.http.routers.myrouter.tls.domains[0].sans=test.example.org,dev.example.org"
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```
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??? info "`traefik.http.routers.<router_name>.tls.options`"
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See [options](../routers/index.md#options) for more information.
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```yaml
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- "traefik.http.routers.myrouter.tls.options=foobar"
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```
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??? info "`traefik.http.routers.<router_name>.priority`"
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See [priority](../routers/index.md#priority) for more information.
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```yaml
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- "traefik.http.routers.myrouter.priority=42"
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```
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### Services
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To update the configuration of the Service automatically attached to the container,
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add labels starting with `traefik.http.services.{name-of-your-choice}.`, followed by the option you want to change.
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For example, to change the `passHostHeader` behavior,
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you'd add the label `traefik.http.services.{name-of-your-choice}.loadbalancer.passhostheader=false`.
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!!! warning "The character `@` is not authorized in the service name `<service_name>`."
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??? info "`traefik.http.services.<service_name>.loadbalancer.server.port`"
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Registers a port.
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Useful when the container exposes multiples ports.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.server.port=8080"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.server.scheme`"
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Overrides the default scheme.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.server.scheme=http"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.serverstransport`"
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Allows to reference a ServersTransport resource that is defined either with the File provider or the Kubernetes CRD one.
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See [serverstransport](../services/index.md#serverstransport) for more information.
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```yaml
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- "traefik.http.services.<service_name>.loadbalancer.serverstransport=foobar@file"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.passhostheader`"
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See [pass Host header](../services/index.md#pass-host-header) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.passhostheader=true"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.headers.<header_name>`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.headers.X-Foo=foobar"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.hostname`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.hostname=example.org"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.interval`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.interval=10s"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.path=/foo"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.port`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.port=42"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.scheme`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.scheme=http"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.timeout`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.timeout=10"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.followredirects`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.healthcheck.followredirects=true"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.sticky.cookie=true"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.httponly`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.sticky.cookie.httponly=true"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.name`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.sticky.cookie.name=foobar"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.secure`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.sticky.cookie.secure=true"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.samesite`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none"
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
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See [response forwarding](../services/index.md#response-forwarding) for more information.
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```yaml
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- "traefik.http.services.myservice.loadbalancer.responseforwarding.flushinterval=10"
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```
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### Middleware
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You can declare pieces of middleware using labels starting with `traefik.http.middlewares.{name-of-your-choice}.`, followed by the middleware type/options.
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For example, to declare a middleware [`redirectscheme`](../../middlewares/http/redirectscheme.md) named `my-redirect`, you'd write `traefik.http.middlewares.my-redirect.redirectscheme.scheme: https`.
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More information about available middlewares in the dedicated [middlewares section](../../middlewares/overview.md).
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!!! warning "The character `@` is not authorized in the middleware name."
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??? example "Declaring and Referencing a Middleware"
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```yaml
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# ...
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labels:
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# Declaring a middleware
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- traefik.http.middlewares.my-redirect.redirectscheme.scheme=https
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# Referencing a middleware
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- traefik.http.routers.my-container.middlewares=my-redirect
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```
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!!! warning "Conflicts in Declaration"
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If you declare multiple middleware with the same name but with different parameters, the middleware fails to be declared.
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### TCP
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You can declare TCP Routers and/or Services using labels.
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??? example "Declaring TCP Routers and Services"
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```yaml
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services:
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my-container:
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# ...
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labels:
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- "traefik.tcp.routers.my-router.rule=HostSNI(`example.com`)"
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- "traefik.tcp.routers.my-router.tls=true"
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- "traefik.tcp.services.my-service.loadbalancer.server.port=4123"
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```
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!!! warning "TCP and HTTP"
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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).
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You can declare both a TCP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).
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#### TCP Routers
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??? info "`traefik.tcp.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.entrypoints=ep1,ep2"
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```
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??? info "`traefik.tcp.routers.<router_name>.rule`"
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See [rule](../routers/index.md#rule_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.rule=HostSNI(`example.com`)"
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```
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??? info "`traefik.tcp.routers.<router_name>.service`"
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See [service](../routers/index.md#services) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.service=myservice"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls`"
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See [TLS](../routers/index.md#tls_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls=true"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.certresolver`"
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See [certResolver](../routers/index.md#certresolver_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls.certresolver=myresolver"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].main`"
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See [domains](../routers/index.md#domains_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls.domains[0].main=example.org"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].sans`"
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See [domains](../routers/index.md#domains_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls.domains[0].sans=test.example.org,dev.example.org"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.options`"
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See [options](../routers/index.md#options_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls.options=mysoptions"
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.passthrough`"
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See [TLS](../routers/index.md#tls_1) for more information.
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```yaml
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- "traefik.tcp.routers.mytcprouter.tls.passthrough=true"
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```
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#### TCP Services
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.server.port`"
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Registers a port of the application.
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```yaml
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- "traefik.tcp.services.mytcpservice.loadbalancer.server.port=423"
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```
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.terminationdelay`"
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See [termination delay](../services/index.md#termination-delay) for more information.
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```yaml
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- "traefik.tcp.services.mytcpservice.loadbalancer.terminationdelay=100"
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```
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.proxyprotocol.version`"
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See [PROXY protocol](../services/index.md#proxy-protocol) for more information.
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```yaml
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- "traefik.tcp.services.mytcpservice.loadbalancer.proxyprotocol.version=1"
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```
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### UDP
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You can declare UDP Routers and/or Services using labels.
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??? example "Declaring UDP Routers and Services"
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```yaml
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services:
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my-container:
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# ...
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labels:
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- "traefik.udp.routers.my-router.entrypoints=udp"
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- "traefik.udp.services.my-service.loadbalancer.server.port=4123"
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```
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!!! warning "UDP and HTTP"
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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).
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You can declare both a UDP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).
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#### UDP Routers
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??? info "`traefik.udp.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints_2) for more information.
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```yaml
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- "traefik.udp.routers.myudprouter.entrypoints=ep1,ep2"
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```
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??? info "`traefik.udp.routers.<router_name>.service`"
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See [service](../routers/index.md#services_1) for more information.
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```yaml
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- "traefik.udp.routers.myudprouter.service=myservice"
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```
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#### UDP Services
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??? info "`traefik.udp.services.<service_name>.loadbalancer.server.port`"
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Registers a port of the application.
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```yaml
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- "traefik.udp.services.myudpservice.loadbalancer.server.port=423"
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```
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### Specific Provider Options
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#### `traefik.enable`
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```yaml
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- "traefik.enable=true"
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```
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You can tell Traefik to consider (or not) the container by setting `traefik.enable` to true or false.
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This option overrides the value of `exposedByDefault`.
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#### Port Lookup
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Traefik is capable of detecting the port to use, by following the default rancher flow.
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That means, if you just expose lets say port `:1337` on the rancher ui, traefik will pick up this port and use it.
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