Use a configmap for a script to take backup of postgres

test/nextcloud/1.0.0/templates/backup-postgres-hook.yaml

+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: "postgres-backup-hook-config-map"
+data:
+  entrypoint.sh: |-
+    #!/bin/sh
+    cmd="/docker-entrypoint.sh postgres"
+    eval "${cmd}" & disown;
+    until pg_isready; do
+      sleep 5;
+    done;
+    pg_dump -U $POSTGRES_USER -d {{ template "postgres.DatabaseName"}} > /postgres_backups/update_dump;
+
+---
+
 apiVersion: batch/v1
 kind: Job
 metadata:
@@ -12,7 +28,7 @@ spec:
       name: "pre-upgrade-hook2"
     spec:
       restartPolicy: Never
-      serviceAccountName: {{ template "nextcloud.serviceAccountName" }}
+      serviceAccountName: "{{ template "nextcloud.serviceAccountName" . }}"
       containers:
       - name: {{ .Chart.Name }}-postgres-backup
         image: "postgres:13.1"
@@ -33,4 +49,20 @@ spec:
             mountPath: /var/lib/postgresql/data
           - name: postgres-backup
             mountPath: /postgres_backups
-        command: ['sh', '-c', "/docker-entrypoint.sh; pg_dump -U $POSTGRES_USER -d {{ template "postgres.DatabaseName"}} > /postgres_backups/update_dump;"]
+          - name: backup-script-configmap
+            mountPath: /bin/backup_entrypoint.sh
+            readOnly: true
+            subPath: entrypoint.sh
+        command:
+          - "/bin/backup_entrypoint.sh"
+      volumes:
+      - name: postgres-data
+        hostPath:
+          path: {{ template "configuredPostgresHostPath" . }}
+      - name: postgres-backup
+        hostPath:
+          path: {{ template "configuredBackupPostgresHostPath" . }}
+      - name: backup-script-configmap
+        configMap:
+          defaultMode: 0700
+          name: "postgres-backup-hook-config-map"

test/nextcloud/1.0.0/templates/nuke-deployments-hook.yaml

@@ -12,8 +12,8 @@ spec:
       name: "pre-upgrade-hook1"
     spec:
       restartPolicy: Never
-      serviceAccountName: {{ template "nextcloud.serviceAccountName" }}
+      serviceAccountName: "{{ template "nextcloud.serviceAccountName" . }}"
       containers:
       - name: kubectl
         image: "bitnami/kubectl:1.19"
-        command: ["delete" , "deployment", "{{ template "nextcloud.fullname" . }}", "{{ template "nextcloud.fullname" . }}-postgres"]
+        command: ["kubectl", "delete" , "deployment", "{{ template "nextcloud.fullname" . }}", "{{ template "nextcloud.fullname" . }}-postgres"]

test/nextcloud/1.0.0/templates/serviceaccount.yaml

 apiVersion: v1
 kind: ServiceAccount
 metadata:
-  name: {{ template "nextcloud.serviceAccountName" }}
+  name: "{{ template "nextcloud.serviceAccountName" . }}"
   namespace: {{ .Release.Namespace }}
 
 ---
@@ -9,14 +9,14 @@ metadata:
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
-  name: {{ .Release.Name }}-service-account-role-binding
+  name: "{{ .Release.Name }}-service-account-role-binding"
 subjects:
 - kind: ServiceAccount
-  name: {{ template "nextcloud.serviceAccountName" }}
+  name: "{{ template "nextcloud.serviceAccountName" . }}"
   namespace: {{ .Release.Namespace }}
 roleRef:
   kind: Role
-  name: spinupcontainers
+  name: "{{ .Release.Name }}-service-account-role"
   apiGroup: rbac.authorization.k8s.io
 
 ---
@@ -24,7 +24,7 @@ roleRef:
 apiVersion: rbac.authorization.k8s.io/v1
 kind: Role
 metadata:
-  name: {{ .Release.Name }}-service-account-role
+  name: "{{ .Release.Name }}-service-account-role"
   namespace: {{ .Release.Namespace }}
 rules:
   - apiGroups: