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Code Issues Releases Wiki Activity

Update Traefik recipe for Kube API deprecations

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Signed-off-by: David Young <davidy@funkypenguin.co.nz>
This commit is contained in:
David Young
2022-08-10 09:58:50 +12:00
parent b19a0f5bf9
commit 7a87fb71f6
1 changed files with 77 additions and 78 deletions
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155
manuscript/kubernetes/ingress/traefik/index.md
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@@ -29,76 +29,74 @@ Traefik natively includes some features which Nginx lacks:
### Namespace
We need a namespace to deploy our HelmRelease and associated ConfigMaps into. Per the [flux design](/kubernetes/deployment/flux/), I create this example yaml in my flux repo at `bootstrap/namespaces/namespace-traefik.yaml`:
We need a namespace to deploy our HelmRelease and associated ConfigMaps into. Per the [flux design](/kubernetes/deployment/flux/), I create this example yaml in my flux repo:
??? example "Example NameSpace (click to expand)"
```yaml
apiVersion: v1
kind: Namespace
metadata:
name: traefik
```
```yaml title="/bootstrap/namespaces/namespace-traefik.yaml"
apiVersion: v1
kind: Namespace
metadata:
name: traefik
```
### HelmRepository
Next, we need to define a HelmRepository (*a repository of helm charts*), to which we'll refer when we create the HelmRelease. We only need to do this once per-repository. In this case, we're using the official [Traefik helm chart](https://github.com/traefik/traefik-helm-chart), so per the [flux design](/kubernetes/deployment/flux/), I create this example yaml in my flux repo at `bootstrap/helmrepositories/helmrepository-traefik.yaml`:
Next, we need to define a HelmRepository (*a repository of helm charts*), to which we'll refer when we create the HelmRelease. We only need to do this once per-repository. In this case, we're using the official [Traefik helm chart](https://github.com/traefik/traefik-helm-chart), so per the [flux design](/kubernetes/deployment/flux/), I create this example yaml in my flux repo:
??? example "Example HelmRepository (click to expand)"
```yaml
apiVersion: source.toolkit.fluxcd.io/v1beta1
kind: HelmRepository
metadata:
name: traefik
namespace: flux-system
spec:
interval: 15m
url: https://helm.traefik.io/traefik
```
```yaml title="/bootstrap/helmrepositories/helmrepository-traefik.yaml"
apiVersion: source.toolkit.fluxcd.io/v1beta1
kind: HelmRepository
metadata:
name: traefik
namespace: flux-system
spec:
interval: 15m
url: https://helm.traefik.io/traefik
```
### Kustomization
Now that the "global" elements of this deployment (*Namespace and HelmRepository*) have been defined, we do some "flux-ception", and go one layer deeper, adding another Kustomization, telling flux to deploy any YAMLs found in the repo at `/traefik`. I create this example Kustomization in my flux repo at `bootstrap/kustomizations/kustomization-traefik.yaml`:
Now that the "global" elements of this deployment (*Namespace and HelmRepository*) have been defined, we do some "flux-ception", and go one layer deeper, adding another Kustomization, telling flux to deploy any YAMLs found in the repo at `/traefik`. I create this example Kustomization in my flux repo:
??? example "Example Kustomization (click to expand)"
```yaml
apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
kind: Kustomization
metadata:
```yaml title="/bootstrap/kustomizations/kustomization-traefik.yaml"
apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
kind: Kustomization
metadata:
name: traefik
namespace: flux-system
spec:
interval: 15m
path: ./traefik
prune: true # remove any elements later removed from the above path
timeout: 2m # if not set, this defaults to interval duration, which is 1h
sourceRef:
kind: GitRepository
name: flux-system
validation: server
healthChecks:
- apiVersion: apps/v1
kind: Deployment
name: traefik
namespace: flux-system
spec:
interval: 15m
path: ./traefik
prune: true # remove any elements later removed from the above path
timeout: 2m # if not set, this defaults to interval duration, which is 1h
sourceRef:
kind: GitRepository
name: flux-system
validation: server
healthChecks:
- apiVersion: apps/v1
kind: Deployment
name: traefik
namespace: traefik
namespace: traefik
```
```
### ConfigMap
Now we're into the traefik-specific YAMLs. First, we create a ConfigMap, containing the entire contents of the helm chart's [values.yaml](https://github.com/traefik/traefik-helm-chart/blob/master/traefik/values.yaml). Paste the values into a `values.yaml` key as illustrated below, indented 4 tabs (*since they're "encapsulated" within the ConfigMap YAML*). I create this example yaml in my flux repo at `traefik/configmap-traefik-helm-chart-value-overrides.yaml`:
Now we're into the traefik-specific YAMLs. First, we create a ConfigMap, containing the entire contents of the helm chart's [values.yaml](https://github.com/traefik/traefik-helm-chart/blob/master/traefik/values.yaml). Paste the values into a `values.yaml` key as illustrated below, indented 4 tabs (*since they're "encapsulated" within the ConfigMap YAML*). I create this example yaml in my flux repo:
??? example "Example ConfigMap (click to expand)"
```yaml
apiVersion: v1
kind: ConfigMap
metadata:
creationTimestamp: null
name: traefik-helm-chart-value-overrides
namespace: traefik
data:
values.yaml: |-
# paste chart values.yaml (indented) here and alter as required>
```
```yaml title="/traefik/configmap-traefik-helm-chart-value-overrides.yaml"
apiVersion: v1
kind: ConfigMap
metadata:
creationTimestamp: null
name: traefik-helm-chart-value-overrides
namespace: traefik
data:
values.yaml: |- # (1)!
# <upstream values go here>
```
1. Paste in the contents of the upstream `values.yaml` here, intended 4 spaces, and then change the values you need as illustrated below.
--8<-- "kubernetes-why-full-values-in-configmap.md"
@@ -108,30 +106,31 @@ Then work your way through the values you pasted, and change any which are speci
Lastly, having set the scene above, we define the HelmRelease which will actually deploy traefik into the cluster, with the config and extra ConfigMap we defined above. I save this in my flux repo as `traefik/helmrelease-traefik.yaml`:
??? example "Example HelmRelease (click to expand)"
```yaml
apiVersion: helm.toolkit.fluxcd.io/v2beta1
kind: HelmRelease
metadata:
name: traefik
namespace: traefik
```yaml
apiVersion: helm.toolkit.fluxcd.io/v2beta1
kind: HelmRelease
metadata:
name: traefik
namespace: traefik
spec:
chart:
spec:
chart:
spec:
chart: traefik
version: 9.x
sourceRef:
kind: HelmRepository
name: bitnami
namespace: flux-system
interval: 15m
timeout: 5m
releaseName: traefik
valuesFrom:
- kind: ConfigMap
name: traefik-helm-chart-value-overrides
valuesKey: values.yaml # This is the default, but best to be explicit for clarity
```
chart: traefik
version: 10.x # (1)!
sourceRef:
kind: HelmRepository
name: traefik
namespace: flux-system
interval: 15m
timeout: 5m
releaseName: traefik
valuesFrom:
- kind: ConfigMap
name: traefik-helm-chart-value-overrides
valuesKey: values.yaml # This is the default, but best to be explicit for clarity
```
1. Use `9.x` for Kubernetes versions older than 1.22, as described [here](https://github.com/traefik/traefik-helm-chart/tree/master/traefik#kubernetes-version-support).
--8<-- "kubernetes-why-not-config-in-helmrelease.md"