ansible-roles/postgresql/tasks/postgresql-config.yml

---
- block: 
  - name: Check if the new postgresql data directory exists
    stat: path={{ psql_data_dir }}
    register: postgresql_data_dir

  - name: Stop the postgresql service while reconfiguring the data directory
    service: name=postgresql state=stopped
    when: postgresql_data_dir.stat.isdir is not defined

  - name: Create the postgresql data directory if it is not in the default place
    file: dest={{ psql_data_dir }} owner=postgres group=postgres mode=700 recurse=yes state=directory

  - name: Set the postgresql data dir if it is different from the default
    become: True
    become_user: postgres
    action: configfile path={{ psql_conf_dir }}/postgresql.conf key=data_directory value="'{{ psql_data_dir }}'"

  - name: Copy the postgresql data directory into the new place
    shell: '[ "/var/lib/postgresql/{{ psql_version }}/main" != "{{ psql_data_dir }}" ] && cp -a /var/lib/postgresql/{{ psql_version }}/main/* {{ psql_data_dir }}'
    args:
      creates: '{{ psql_data_dir }}/main/base'
    when: postgresql_data_dir.stat.isdir is not defined

  - name: Start the postgresql service that will use the new data directory
    service: name=postgresql state=started 
    when: postgresql_data_dir.stat.isdir is not defined

  when: psql_use_alternate_data_dir
  tags: [ 'postgresql', 'postgres', 'pg_conf' ]

- name: Set some postgresql configuration parameters that require a db restart
  become: True
  become_user: postgres
  action: configfile path={{ psql_conf_dir }}/postgresql.conf key={{ item.name }} value="{{ item.value }}"
  with_items: '{{ psql_conf_parameters }}'
  when: item.set == 'True'
  notify: Restart postgresql
  tags: [ 'postgresql', 'postgres', 'pg_conf' ]

- name: Set the postgresql logging configuration parameters
  become: True
  become_user: postgres
  action: configfile path={{ psql_conf_dir }}/postgresql.conf key={{ item.name }} value="{{ item.value }}"
  with_items: '{{ psql_log_configuration }}'
  when: item.set == 'True'
  notify: Reload postgresql
  tags: [ 'postgresql', 'postgres', 'pg_conf', 'pg_conf_log' ]

- name: Set the postgresql autovacuum configuration parameters
  become: True
  become_user: postgres
  action: configfile path={{ psql_conf_dir }}/postgresql.conf key={{ item.name }} value="{{ item.value }}"
  with_items: '{{ psql_autovacuum_configuration }}'
  when: item.set == 'True'
  notify: Reload postgresql
  tags: [ 'postgresql', 'postgres', 'pg_conf', 'pg_conf_autovacuum' ]