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Custom Resource Annotations in Helm-based Operators

Use custom resource annotations to configure how reconciliation works.

helm.sdk.operatorframework.io/upgrade-force

This annotation can be set to "true" on custom resources to enable the chart to be upgraded with the helm upgrade --force option. For more info see the Helm Upgrade documentation and this explanation of --force behavior.

Example

apiVersion: example.com/v1alpha1
kind: Nginx
metadata:
  name: nginx-sample
  annotations:
    helm.sdk.operatorframework.io/upgrade-force: "true"
spec:
  replicaCount: 2
  service:
    port: 8080

Setting this annotation to true and making a change to trigger an upgrade (e.g. setting spec.replicaCount: 3) will cause the custom resource to be reconciled and upgraded with the force option. This can be verified in the log message when an upgrade succeeds:

{"level":"info","ts":1591198931.1703992,"logger":"helm.controller","msg":"Upgraded release","namespace":"helm-nginx","name":"example-nginx","apiVersion":"cache.example.com/v1alpha1","kind":"Nginx","release":"example-nginx","force":true}

helm.sdk.operatorframework.io/uninstall-wait

This annotation can be set to "true" on custom resources to enable the deletion to wait until all the resources in the status.deployedRelease.manifest are deleted.

Example

apiVersion: example.com/v1alpha1
kind: Nginx
metadata:
  name: nginx-sample
  annotations:
    helm.sdk.operatorframework.io/uninstall-wait: "true"
spec:
...
status:
  ...
  deployedRelease:
    manifest: |
      ---
      # Source: nginx/templates/serviceaccount.yaml
      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: nginx-sample
        labels:
          helm.sh/chart: nginx-0.1.0
          app.kubernetes.io/name: nginx
          app.kubernetes.io/instance: nginx-sample
          app.kubernetes.io/version: "1.16.0"
          app.kubernetes.io/managed-by: Helm
      ---
      # Source: nginx/templates/service.yaml
      apiVersion: v1
      kind: Service
      metadata:
        name: nginx-sample
        labels:
          helm.sh/chart: nginx-0.1.0
          app.kubernetes.io/name: nginx
          app.kubernetes.io/instance: nginx-sample
          app.kubernetes.io/version: "1.16.0"
          app.kubernetes.io/managed-by: Helm
      spec:
        type: ClusterIP
        ports:
          - port: 80
            targetPort: http
            protocol: TCP
            name: http
        selector:
          app.kubernetes.io/name: nginx
          app.kubernetes.io/instance: nginx-sample
      ---
      # Source: nginx/templates/deployment.yaml
      apiVersion: apps/v1
      kind: Deployment
      metadata:
        name: nginx-sample
        labels:
          helm.sh/chart: nginx-0.1.0
          app.kubernetes.io/name: nginx
          app.kubernetes.io/instance: nginx-sample
          app.kubernetes.io/version: "1.16.0"
          app.kubernetes.io/managed-by: Helm
      spec:
        replicas: 1
        selector:
          matchLabels:
            app.kubernetes.io/name: nginx
            app.kubernetes.io/instance: nginx-sample
        template:
          metadata:
            labels:
              app.kubernetes.io/name: nginx
              app.kubernetes.io/instance: nginx-sample
          spec:
            serviceAccountName: nginx-sample
            securityContext:
              {}
            containers:
              - name: nginx
                securityContext:
                  {}
                image: "nginx:1.16.0"
                imagePullPolicy: IfNotPresent
                ports:
                  - name: http
                    containerPort: 80
                    protocol: TCP
                livenessProbe:
                  httpGet:
                    path: /
                    port: http
                readinessProbe:
                  httpGet:
                    path: /
                    port: http
                resources:
                  {}

Setting this annotation to true and deleting the custom resource will cause the custom resource to be reconciled continuously until all the resources in status.deployedRelease.manifest are deleted. This can be verified in the log message when a delete has been triggered:

{"level":"info","ts":1612294054.5845876,"logger":"helm.controller","msg":"Uninstall wait","namespace":"default","name":"nginx-sample","apiVersion":"example.com/v1alpha1","kind":"Nginx","release":"nginx-sample"}