Abandon removed resources but don't delete them on upgrade (#40)

templates/abandon-resources-hook.yaml

@@ -0,0 +1,36 @@
+# This job is used to stop Helm from managing resources without deleting them.
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: kotsadm-abandon-resources
+  annotations:
+    helm.sh/hook: pre-upgrade
+    helm.sh/hook-weight: "2"
+  labels:
+    {{- include "admin-console.labels" . | nindent 4 }}
+spec:
+  template:
+    metadata:
+      labels:
+        {{- include "admin-console.labels" . | nindent 8 }}
+    spec:
+      containers:
+      - command:
+        - /bin/sh
+        - -c
+        - |
+          if kubectl get configmap kotsadm-confg -n {{ .Release.Namespace }} -o jsonpath='{.metadata.labels.app\.kubernetes\.io/managed-by}' | grep -q "Helm"; then
+            kubectl annotate configmap kotsadm-confg -n {{ .Release.Namespace }} helm.sh/resource-policy=keep
+          fi
+          if kubectl get configmap kotsadm-application-metadata -n {{ .Release.Namespace }} -o jsonpath='{.metadata.labels.app\.kubernetes\.io/managed-by}' | grep -q "Helm"; then
+            kubectl annotate configmap kotsadm-application-metadata -n {{ .Release.Namespace }} helm.sh/resource-policy=keep
+          fi
+        image: {{ .Values.images.kotsadm }}
+        imagePullPolicy: IfNotPresent
+        name: abandon-resources
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+      restartPolicy: OnFailure
+      serviceAccountName: kotsadm