add postgres-cluster-databases

roles/postgres-cluster-databases/defaults/main.yml

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+---
+# RHEL/CentOS only. Set a repository to use for PostgreSQL installation.
+postgresql_enablerepo: ""
+
+# Set postgresql state when configuration changes are made. Recommended values:
+# `restarted` or `reloaded`
+postgresql_restarted_state: "restarted"
+
+postgresql_python_library: python-psycopg2
+postgresql_user: postgres
+postgresql_group: postgres
+
+postgresql_unix_socket_directories:
+  - /var/run/postgresql
+
+postgresql_service_state: started
+postgresql_service_enabled: true
+
+# Global configuration options that will be set in postgresql.conf.
+postgresql_global_config_options:
+  - option: unix_socket_directories
+    value: '{{ postgresql_unix_socket_directories | join(",") }}'
+
+# Host based authentication (hba) entries to be added to the pg_hba.conf. This
+# variable's defaults reflect the defaults that come with a fresh installation.
+postgresql_hba_entries:
+  - {type: local, database: all, user: postgres, auth_method: peer}
+  - {type: local, database: all, user: all, auth_method: peer}
+  - {type: host, database: all, user: all, address: '127.0.0.1/32', auth_method: md5}
+  - {type: host, database: all, user: all, address: '::1/128', auth_method: md5}
+
+# Debian only. Used to generate the locales used by PostgreSQL databases.
+postgresql_locales:
+  - 'en_US.UTF-8'
+
+# Databases to ensure exist.
+postgresql_databases: []
+# - name: exampledb # required; the rest are optional
+#   lc_collate: # defaults to 'en_US.UTF-8'
+#   lc_ctype: # defaults to 'en_US.UTF-8'
+#   encoding: # defaults to 'UTF-8'
+#   template: # defaults to 'template0'
+#   login_host: # defaults to 'localhost'
+#   login_password: # defaults to not set
+#   login_user: # defaults to '{{ postgresql_user }}'
+#   login_unix_socket: # defaults to 1st of postgresql_unix_socket_directories
+#   port: # defaults to not set
+#   owner: # defaults to postgresql_user
+#   state: # defaults to 'present'
+
+# Users to ensure exist.
+postgresql_users: []
+# - name: jdoe #required; the rest are optional
+#   password: # defaults to not set
+#   encrypted: # defaults to not set
+#   priv: # defaults to not set
+#   role_attr_flags: # defaults to not set
+#   db: # defaults to not set
+#   login_host: # defaults to 'localhost'
+#   login_password: # defaults to not set
+#   login_user: # defaults to '{{ postgresql_user }}'
+#   login_unix_socket: # defaults to 1st of postgresql_unix_socket_directories
+#   port: # defaults to not set
+#   state: # defaults to 'present'
+
+# Whether to output user data when managing users.
+postgres_users_no_log: true

roles/postgres-cluster-databases/tasks/main.yml

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+---
+- name: Install psycopg2
+  pip:
+    name: psycopg2
+  when: not (postgresql_cluster_is_monitor | default('False') | bool)
+
+- name: Ensure PostgreSQL databases are present.
+  postgresql_db:
+    name: "{{ item.name }}"
+    lc_collate: "{{ item.lc_collate | default('en_US.UTF-8') }}"
+    lc_ctype: "{{ item.lc_ctype | default('en_US.UTF-8') }}"
+    encoding: "{{ item.encoding | default('UTF-8') }}"
+    template: "{{ item.template | default('template0') }}"
+    login_host: "{{ item.login_host | default('localhost') }}"
+    login_password: "{{ item.login_password | default(omit) }}"
+    login_user: "{{ item.login_user | default(postgresql_user) }}"
+    login_unix_socket: "{{ item.login_unix_socket | default(postgresql_unix_socket_directories[0]) }}"
+    port: "{{ item.port | default(postgresql_cluster_port) }}"
+    owner: "{{ item.owner | default(postgresql_user) }}"
+    state: "{{ item.state | default('present') }}"
+  with_items: "{{ postgresql_databases }}"
+  become: true
+  become_user: "{{ postgresql_user }}"
+  # See: https://github.com/ansible/ansible/issues/16048#issuecomment-229012509
+  vars:
+    ansible_ssh_pipelining: true
+  when: not (postgresql_cluster_is_monitor | default('False') | bool)