128 lines
3.5 KiB
Markdown
128 lines
3.5 KiB
Markdown
# Traefik & Kubernetes
|
|
|
|
The Kubernetes Ingress Controller, The Custom Resource Way.
|
|
{: .subtitle }
|
|
|
|
<!--
|
|
TODO (Link "Kubernetes Ingress controller" to ./kubernetes-ingress.md)
|
|
-->
|
|
|
|
The Traefik Kubernetes provider used to be a Kubernetes Ingress controller in the strict sense of the term; that is to say,
|
|
it would manage access to a cluster services by supporting the [Ingress](https://kubernetes.io/docs/concepts/services-networking/ingress/) specification.
|
|
|
|
However, as the community expressed the need to benefit from Traefik features without resorting to (lots of) annotations,
|
|
we ended up writing a [Custom Resource Definition](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/) (alias CRD in the following) for an IngressRoute type, defined below, in order to provide a better way to configure access to a Kubernetes cluster.
|
|
|
|
## Traefik IngressRoute definition
|
|
|
|
```yaml
|
|
--8<-- "content/providers/crd_ingress_route.yml"
|
|
```
|
|
|
|
That `IngressRoute` kind can then be used to define an `IngressRoute` object, such as:
|
|
|
|
```yaml
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: IngressRoute
|
|
metadata:
|
|
name: ingressroutefoo.crd
|
|
|
|
spec:
|
|
entryPoints:
|
|
- web
|
|
routes:
|
|
# Match is the rule corresponding to an underlying router.
|
|
# Later on, match could be the simple form of a path prefix, e.g. just "/bar",
|
|
# but for now we only support a traefik style matching rule.
|
|
- match: Host(`foo.com`) && PathPrefix(`/bar`)
|
|
# kind could eventually be one of "Rule", "Path", "Host", "Method", "Header",
|
|
# "Parameter", etc, to support simpler forms of rule matching, but for now we
|
|
# only support "Rule".
|
|
kind: Rule
|
|
# Priority disambiguates rules of the same length, for route matching.
|
|
priority: 12
|
|
services:
|
|
- name: whoami
|
|
port: 80
|
|
```
|
|
|
|
## Middleware
|
|
|
|
Additionally, to allow for the use of middlewares in an `IngressRoute`, we defined the CRD below for the `Middleware` kind.
|
|
|
|
```yaml
|
|
--8<-- "content/providers/crd_middlewares.yml"
|
|
```
|
|
|
|
Once the `Middleware` kind has been registered with the Kubernetes cluster, it can then be used in `IngressRoute` definitions, such as:
|
|
|
|
```yaml
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: Middleware
|
|
metadata:
|
|
name: stripprefix
|
|
|
|
spec:
|
|
stripPrefix:
|
|
prefixes:
|
|
- /stripit
|
|
|
|
---
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: IngressRoute
|
|
metadata:
|
|
name: ingressroutebar.crd
|
|
|
|
spec:
|
|
entryPoints:
|
|
- web
|
|
routes:
|
|
- match: Host(`bar.com`) && PathPrefix(`/stripit`)
|
|
kind: Rule
|
|
services:
|
|
- name: whoami
|
|
port: 80
|
|
middlewares:
|
|
- name: stripprefix
|
|
```
|
|
|
|
## TLS
|
|
|
|
To allow for TLS, we made use of the `Secret` kind, as it was already defined, and it can be directly used in an `IngressRoute`:
|
|
|
|
```yaml
|
|
apiVersion: v1
|
|
kind: Secret
|
|
metadata:
|
|
name: supersecret
|
|
|
|
data:
|
|
tls.crt: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCi0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0=
|
|
tls.key: LS0tLS1CRUdJTiBQUklWQVRFIEtFWS0tLS0tCi0tLS0tRU5EIFBSSVZBVEUgS0VZLS0tLS0=
|
|
|
|
---
|
|
apiVersion: traefik.containo.us/v1alpha1
|
|
kind: IngressRoute
|
|
metadata:
|
|
name: ingressroutetls.crd
|
|
|
|
spec:
|
|
entryPoints:
|
|
- web
|
|
routes:
|
|
- match: Host(`foo.com`) && PathPrefix(`/bar`)
|
|
kind: Rule
|
|
services:
|
|
- name: whoami
|
|
port: 443
|
|
tls:
|
|
secretName: supersecret
|
|
```
|
|
|
|
## Full reference example
|
|
|
|
If you're in a hurry, maybe you'd rather go through the [static](../reference/static-configuration.md) and the [dynamic](../reference/dynamic-configuration/kubernetes-crd.md) configuration references.
|
|
|
|
## Further
|
|
|
|
Also see the [full example](../user-guides/crd-acme/index.md) with Let's Encrypt.
|