Initial commit of PostgreSQL ansible role

Change-Id: Ieb82fed65ac8957058c4269182e1ea06f5bb87ee
diff --git a/molecule/default/verify.yml b/molecule/default/verify.yml
new file mode 100644
index 0000000..c5d854c
--- /dev/null
+++ b/molecule/default/verify.yml
@@ -0,0 +1,35 @@
+---
+# postgresql molecule/default/verify.yml
+#
+# SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+
+- name: Verify
+  hosts: all
+  tasks:
+
+    # user/pw/db defined in converge.yaml
+    # docs: https://docs.ansible.com/ansible/latest/modules/postgresql_ping_module.html
+    - name: Check that user can connect to database
+      postgresql_ping:
+        login_host: "localhost"
+        db: "exampledb"
+        login_user: "exampleuser"
+        login_password: "examplepass"
+
+    # docs: https://docs.ansible.com/ansible/latest/modules/postgresql_info_module.html
+    # default version is
+    - name: Check PostgreSQL Info
+      postgresql_info:
+        db: postgres
+      become: true
+      become_user: "postgres"
+      register: pgsql_info
+
+    # print entire pgsql_info if needed
+    # - debug: var=pgsql_info
+
+    - name: Verify PostgreSQL major version
+      assert:
+        that:
+          - pgsql_info['version']['major'] == 12