provide example using external-dns helm chart

[not22day]

Is your feature request related to a problem? Please describe.

at the moment the example is based on plain manifest

Describe the solution you'd like

for me the official external-dns helm chart looks flexible enough
to inject the stackit webhook via values
https://github.com/kubernetes-sigs/external-dns/blob/master/charts/external-dns/templates/deployment.yaml

Describe alternatives you've considered

Search

• I did search for other open and closed issues before opening this.

Code of Conduct

• I agree to follow this project's Code of Conduct

Additional context

No response

[not22day]

some promising start..

provider:
    name: webhook
    webhook:
      image:
        repository: ghcr.io/stackitcloud/external-dns-stackit-webhook
        tag: v0.3.1
      args:
      - --project-id=xxx
      env:
      - name: AUTH_TOKEN
        valueFrom:
          secretKeyRef:
            name: external-dns-stackit-webhook
            key: auth-token

[fjvela]

Hello @not22day !

Check the code:

  logLevel: info
  logFormat: text
  interval: 1m
  sources:
    - service
    - ingress
  policy: sync

  provider:
    name: webhook
    webhook:
      image:
        # -- (string) Image repository for the `webhook` container.
        repository: ghcr.io/stackitcloud/external-dns-stackit-webhook
        # -- (string) Image tag for the `webhook` container.
        tag: v0.3.2
        # -- Image pull policy for the `webhook` container.
        pullPolicy: IfNotPresent
      # -- [Environment variables](https://kubernetes.io/docs/tasks/inject-data-application/define-environment-variable-container/) for the `webhook` container.
      env:
        - name: AUTH_TOKEN
          valueFrom:
            secretKeyRef:
              name: external-dns-stackit-webhook
              key: auth-token
        - name: PROJECT_ID
          valueFrom:
            secretKeyRef:
              name: external-dns-stackit-webhook
              key: project-id
      # -- Extra arguments to provide for the `webhook` container.
      # args: ["--log-level=debug", --api-port=8080, "--project-id=$PROJECT_ID"]
      # -- Extra [volume mounts](https://kubernetes.io/docs/concepts/storage/volumes/) for the `webhook` container.
      extraVolumeMounts: []
      # -- [Resources](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/) for the `webhook` container.
      resources: {}
      # -- [Pod security context](https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-the-security-context-for-a-container) for the `webhook` container.
      # @default -- See _values.yaml_
      securityContext:
        capabilities:
          drop:
            - ALL
        readOnlyRootFilesystem: true
        runAsNonRoot: true
        runAsUser: 65534
      # -- [Liveness probe](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/) configuration for the `external-dns` container.
      # @default -- See _values.yaml_
      livenessProbe:
        failureThreshold: 2
        httpGet:
          path: /healthz
          port: 8888
        initialDelaySeconds: 10
        periodSeconds: 10
        successThreshold: 1
        timeoutSeconds: 5
      # -- [Readiness probe](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/) configuration for the `webhook` container.
      # @default -- See _values.yaml_
      readinessProbe:
        failureThreshold: 6
        httpGet:
          path: /healthz
          port: 8888
        initialDelaySeconds: 5
        periodSeconds: 10
        successThreshold: 1