postgres: proper replication config

postgres/config/clusters/main.yaml

@@ -21,6 +21,12 @@ spec:
       metrics_enabled: "true"
   
   externalClusters:
+    - name: weyma-pgsql
+      plugin:
+        name: barman-cloud.cloudnative-pg.io
+        parameters:
+          barmanObjectName: truenas-s3
+          serverName: weyma-pgsql
     - name: weyma-bs-pgsql
       plugin:
         name: barman-cloud.cloudnative-pg.io
@@ -28,6 +34,10 @@ spec:
           barmanObjectName: truenas-s3
           serverName: weyma-bs-pgsql
 
+  replica:
+    primary: weyma-pgsql
+    source: weyma-bs-pgsql
+
   managed:
     services:
       additional: