fix

apps/nextcloud/postgresql.tf

@@ -52,16 +52,16 @@ resource "kubectl_manifest" "prj_pg" {
             databases:
             - ${var.component}
             source:
-              externalCluster: ${var.postgres.version}
+              externalCluster: "${var.instance}-${var.component}"
       externalClusters:
-        - name: ${var.postgres.version}
+        - name: "${var.instance}-${var.component}"
           connectionParameters:
-            host: ${var.postgres.version}
+            host: "${var.instance}-${var.component}"
             user: postgres
             dbname: postgres
             sslmode: require
           password:
-            name: postgres.${var.postgres.version}.credentials.postgresql.acid.zalan.do
+            name: "postgres.${var.instance}-${var.component}.credentials.postgresql.acid.zalan.do"
             key: password
   EOF
 }