roles/postgresql_server/defaults/main.yml

@@ -0,0 +1,4 @@
+---
+postgresql_db: []
+postgresql_users: []
+...

roles/postgresql_server/tasks/main.yml

@@ -37,3 +37,17 @@
     - postgresql.conf
   notify:
     - restart postgresql
+
+- name: Create databases
+  postgresql_db:
+    name: "{{ item.name }}"
+  loop: "{{ postgresql_databases }}"
+
+- name: Create users
+  postgresql_user:
+    db: "{{ item.database }}"
+    name: "{{ item.name }}"
+    password: "{{ item.password }}"
+    priv: "{{ item.priv }}"
+  loop: "{{ postgresql_users }}"
+...