update docs about helm and cluster configuration

manifests/complete-postgres-manifest.yaml

@@ -71,3 +71,17 @@ spec:
   maintenanceWindows:
   - 01:00-06:00 #UTC
   - Sat:00:00-04:00
+  #sidecars:
+  #  - name: "telegraf-sidecar"
+  #    image: "telegraf:latest"
+  #    resources:
+  #      limits:
+  #        cpu: 500m
+  #        memory: 500Mi
+  #      requests:
+  #        cpu: 100m
+  #        memory: 100Mi
+  #    env:
+  #      - name: "USEFUL_VAR"
+  #        value: "perhaps-true"
+

manifests/configmap.yaml

@@ -13,6 +13,7 @@ data:
   docker_image: registry.opensource.zalan.do/acid/spilo-11:1.5-p7
   pod_service_account_name: "zalando-postgres-operator"
   secret_name_template: '{username}.{cluster}.credentials'
+  cluster_domain: cluster.local
   super_username: postgres
   enable_teams_api: "false"
   spilo_privileged: "false"

manifests/postgresql-operator-default-configuration.yaml

@@ -21,6 +21,7 @@ configuration:
     pod_terminate_grace_period: 5m
     pdb_name_format: "postgres-{cluster}-pdb"
     secret_name_template: "{username}.{cluster}.credentials.{tprkind}.{tprgroup}"
+    cluster_domain: cluster.local
     oauth_token_secret_name: postgresql-operator
     pod_role_label: spilo-role
     spilo_privileged: false