Add logical backup (#442)

* Add k8s cron job to spawn logical backups

* Minor doc updates

manifests/complete-postgres-manifest.yaml

@@ -64,6 +64,10 @@ spec:
   #  cluster: "acid-batman"
   #  timestamp: "2017-12-19T12:40:33+01:00" # timezone required (offset relative to UTC, see RFC 3339 section 5.6)
   #  s3_wal_path: "s3://custom/path/to/bucket"
+  
+  # run periodic backups with k8s cron jobs
+  # enableLogicalBackup: true
+  # logicalBackupSchedule: "30 00 * * *"
   maintenanceWindows:
   - 01:00-06:00 #UTC
   - Sat:00:00-04:00

manifests/configmap.yaml

@@ -54,3 +54,7 @@ data:
   resource_check_interval: 3s
   resource_check_timeout: 10m
   resync_period: 5m
+
+  # logical_backup_schedule: "30 00 * * *"
+  # logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup"
+  # logical_backup_s3_bucket: ""

manifests/minimal-postgres-manifest.yaml

@@ -17,7 +17,6 @@ spec:
     # role for application foo
     foo_user: []
 
-  
   #databases: name->owner
   databases:
     foo: zalando

manifests/operator-service-account-rbac.yaml

@@ -142,7 +142,17 @@ rules:
   - bind
   resourceNames:
   - zalando-postgres-operator
-
+- apiGroups:
+  - batch
+  resources:
+  - cronjobs # enables logical backups
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding

manifests/postgresql-operator-default-configuration.yaml

@@ -91,4 +91,7 @@ configuration:
     # scalyr_api_key: ""
     # scalyr_image: ""
     # scalyr_server_url: ""
-
+  logical_backup:
+    logical_backup_schedule: "30 00 * * *"
+    logical_backup_docker_image: "registry.opensource.zalan.do/acid/logical-backup"
+    logical_backup_s3_bucket: ""