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Improve Kubernetes support documentation

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Co-authored-by: Kevin Pollet <pollet.kevin@gmail.com>
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5
docs/content/deprecation/features.md
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@ -6,6 +6,7 @@ This page is maintained and updated periodically to reflect our roadmap and any
|----------------------------------------------------------------------------------------------------------------------|------------|----------------|---------|
| [Kubernetes CRDs API Version `traefik.io/v1alpha1`](#kubernetes-crds-api-version-traefikiov1alpha1) | N/A | N/A | 3.0 |
| [Kubernetes Ingress API Version `networking.k8s.io/v1beta1`](#kubernetes-ingress-api-version-networkingk8siov1beta1) | N/A | N/A | 3.0 |
| [CRD API Version `apiextensions.k8s.io/v1beta1`](#kubernetes-ingress-api-version-networkingk8siov1beta1) | N/A | N/A | 3.0 |
## Impact
@ -16,3 +17,7 @@ The newly introduced Kubernetes CRD API Version `traefik.io/v1alpha1` will subse
### Kubernetes Ingress API Version `networking.k8s.io/v1beta1`
The Kubernetes Ingress API Version `networking.k8s.io/v1beta1` is removed in v3. Please use the API Group `networking.k8s.io/v1` instead.
### Traefik CRD API Version `apiextensions.k8s.io/v1beta1`
The Traefik CRD API Version `apiextensions.k8s.io/v1beta1` is removed in v3. Please use the API Group `apiextensions.k8s.io/v1` instead.

3
docs/content/includes/kubernetes-requirements.md Normal file
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@ -0,0 +1,3 @@
Traefik follows the [Kubernetes support policy](https://kubernetes.io/releases/version-skew-policy/#supported-versions),
and supports at least the latest three minor versions of Kubernetes.
General functionality cannot be guaranteed for versions older than that.

13
docs/content/middlewares/http/overview.md
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@ -26,19 +26,6 @@ whoami:
```yaml tab="Kubernetes IngressRoute"
# As a Kubernetes Traefik IngressRoute
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: middlewares.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: Middleware
plural: middlewares
singular: middleware
scope: Namespaced
---
apiVersion: traefik.io/v1alpha1
kind: Middleware

13
docs/content/middlewares/tcp/overview.md
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@ -26,19 +26,6 @@ whoami:
```yaml tab="Kubernetes IngressRoute"
# As a Kubernetes Traefik IngressRoute
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: middlewaretcps.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: MiddlewareTCP
plural: middlewaretcps
singular: middlewaretcp
scope: Namespaced
---
apiVersion: traefik.io/v1alpha1
kind: MiddlewareTCP

9
docs/content/migration/v2-to-v3.md
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@ -97,7 +97,12 @@ In v3, the provider Docker has been split into 2 providers:
### Kubernetes Ingress API Group `networking.k8s.io/v1beta1`
As v3 is targeting support for Kubernetes v1.23+,
the Kubernetes Ingress API Group `networking.k8s.io/v1beta1` ([removed since Kubernetes v1.22](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122)) support has been removed.
In v3, the Kubernetes Ingress API Group `networking.k8s.io/v1beta1` ([removed since Kubernetes v1.22](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#ingress-v122)) support has been removed.
Please use the API Group `networking.k8s.io/v1` instead.
### Traefik CRD API Version `apiextensions.k8s.io/v1beta1`
In v3, the Traefik CRD API Version `apiextensions.k8s.io/v1beta1` ([removed since Kubernetes v1.22](https://kubernetes.io/docs/reference/using-api/deprecation-guide/#customresourcedefinition-v122)) support has been removed.
Please use the CRD definition with the API Version `apiextensions.k8s.io/v1` instead.

10
docs/content/providers/kubernetes-crd.md
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@ -14,7 +14,9 @@ However, as the community expressed the need to benefit from Traefik features wi
the Traefik engineering team developed a [Custom Resource Definition](https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/)
(CRD) for an IngressRoute type, defined below, in order to provide a better way to configure access to a Kubernetes cluster.
## Configuration Requirements
## Requirements
{!kubernetes-requirements.md!}
!!! tip "All Steps for a Successful Deployment"
@ -25,12 +27,6 @@ the Traefik engineering team developed a [Custom Resource Definition](https://ku
* Apply the needed kubernetesCRD provider [configuration](#provider-configuration)
* Add all necessary Traefik custom [resources](../reference/dynamic-configuration/kubernetes-crd.md#resources)
!!! warning "Deprecated apiextensions.k8s.io/v1beta1 CRD"
The `apiextensions.k8s.io/v1beta1` CustomResourceDefinition is deprecated in Kubernetes `v1.16+` and will be removed in `v1.22+`.
For Kubernetes `v1.16+`, please use the Traefik `apiextensions.k8s.io/v1` CRDs instead.
!!! example "Installing Resource Definition and RBAC"
```bash

4
docs/content/providers/kubernetes-gateway.md
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@ -41,7 +41,9 @@ This provider is proposed as an experimental feature and partially supports the
--experimental.kubernetesgateway=true --providers.kubernetesgateway=true #...
```
## Configuration Requirements
## Requirements
{!kubernetes-requirements.md!}
!!! tip "All Steps for a Successful Deployment"

2
docs/content/providers/kubernetes-ingress.md
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@ -13,7 +13,7 @@ it manages access to cluster services by supporting the [Ingress](https://kubern
## Requirements
Traefik supports `1.23+` Kubernetes clusters.
{!kubernetes-requirements.md!}
## Routing Configuration

133
docs/content/reference/dynamic-configuration/kubernetes-crd-definition-v1beta1.yml
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@ -1,133 +0,0 @@
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressroutes.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: IngressRoute
plural: ingressroutes
singular: ingressroute
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: middlewares.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: Middleware
plural: middlewares
singular: middleware
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: middlewaretcps.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: MiddlewareTCP
plural: middlewaretcps
singular: middlewaretcp
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressroutetcps.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: IngressRouteTCP
plural: ingressroutetcps
singular: ingressroutetcp
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: ingressrouteudps.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: IngressRouteUDP
plural: ingressrouteudps
singular: ingressrouteudp
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: tlsoptions.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: TLSOption
plural: tlsoptions
singular: tlsoption
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: tlsstores.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: TLSStore
plural: tlsstores
singular: tlsstore
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: traefikservices.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: TraefikService
plural: traefikservices
singular: traefikservice
scope: Namespaced
---
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
name: serverstransports.traefik.io
spec:
group: traefik.io
version: v1alpha1
names:
kind: ServersTransport
plural: serverstransports
singular: serverstransport
scope: Namespaced

10
docs/content/reference/dynamic-configuration/kubernetes-crd.md
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@ -8,22 +8,12 @@ description: "Learn about the definitions, resources, and RBAC of dynamic config
Dynamic configuration with Kubernetes Custom Resource
{: .subtitle }
!!! warning "Deprecated apiextensions.k8s.io/v1beta1 CRD"
The `apiextensions.k8s.io/v1beta1` CustomResourceDefinition is deprecated in Kubernetes `v1.16+` and will be removed in `v1.22+`.
For Kubernetes `v1.16+`, please use the Traefik `apiextensions.k8s.io/v1` CRDs instead.
## Definitions
```yaml tab="apiextensions.k8s.io/v1 (Kubernetes v1.16+)"
--8<-- "content/reference/dynamic-configuration/kubernetes-crd-definition-v1.yml"
```
```yaml tab="apiextensions.k8s.io/v1beta1 (Deprecated)"
--8<-- "content/reference/dynamic-configuration/kubernetes-crd-definition-v1beta1.yml"
```
## Resources
```yaml

2
docs/content/routing/providers/kubernetes-crd.md
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@ -290,7 +290,7 @@ The Kubernetes Ingress Controller, The Custom Resource Way.
### Custom Resource Definition (CRD)
* You can find an exhaustive list, generated from Traefik's source code, of the custom resources and their attributes in [the reference page](../../reference/dynamic-configuration/kubernetes-crd.md).
* Validate that [the prerequisites](../../providers/kubernetes-crd.md#configuration-requirements) are fulfilled before using the Traefik custom resources.
* Validate that [the prerequisites](../../providers/kubernetes-crd.md#requirements) are fulfilled before using the Traefik custom resources.
* Traefik CRDs are building blocks that you can assemble according to your needs.
You can find an excerpt of the available custom resources in the table below:

2
docs/content/routing/providers/kubernetes-gateway.md
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@ -34,7 +34,7 @@ The Kubernetes Gateway API, The Experimental Way. {: .subtitle }
* You can find an exhaustive list, of the custom resources and their attributes in
[the reference page](../../reference/dynamic-configuration/kubernetes-gateway.md) or in the Kubernetes
Sigs `Gateway API` [repository](https://github.com/kubernetes-sigs/gateway-api).
* Validate that [the prerequisites](../../providers/kubernetes-gateway.md#configuration-requirements) are fulfilled
* Validate that [the prerequisites](../../providers/kubernetes-gateway.md#requirements) are fulfilled
before using the Traefik Kubernetes Gateway Provider.
You can find an excerpt of the supported Kubernetes Gateway API resources in the table below: