r/postgresql-data: Manage users and databases

This role can ensure PostgreSQL users and databases are created for
applications that are not themselves managed by Ansible.  Notably, we
need to do this for anything deployed in Kubernetes that uses the
central database server.

roles/postgresql-data/defaults/main.yml

@@ -0,0 +1,2 @@
+postgresql_users: []
+postgresql_dbs: []

roles/postgresql-data/tasks/main.yml

@@ -0,0 +1,23 @@
+- name: ensure postgresql users exist
+  become: true
+  become_user: postgres
+  postgresql_user:
+    name: '{{ item.name }}'
+    password: '{{ item.password|d(omit) }}'
+    state: present
+  loop: '{{ postgresql_users }}'
+  tags:
+  - postgresql-user
+
+- name: ensure postgresql databases exist
+  become: true
+  become_user: postgres
+  postgresql_db:
+    name: '{{ item.name }}'
+    owner: '{{ item.owner|d(item.name) }}'
+    encoding: '{{ item.encoding|d(omit) }}'
+    lc_collate: '{{ item.lc_collate|d(omit) }}'
+    lc_ctype: '{{ item.lc_ctype|d(omit) }}'
+  loop: '{{ postgresql_dbs }}'
+  tags:
+  - postgresql-db