postgresql/tasks/restore.yaml

- name: Restore database
  when: postgresql_wal_g_force_delete_and_restore
  block:
    - name: Stop PostgreSQL
      systemd:
        daemon_reload: true
        name: "{{ postgresql_unit_name }}"
        state: stopped
        masked: no

    - name: Force purge database directory
      file:
        path: "{{ postgresql_data_dir }}"
        state: absent

    - name: Recreate database directory
      file:
        path: "{{ postgresql_data_dir }}"
        state: directory
      become_user: postgres

- name: Check if d folder is empty before proceeding
  find:
    paths: "{{ postgresql_data_dir }}"
  register: postgresql_files_found

- name: Restore database
  when: 
    - postgresql_files_found.matched == 0
  block:
    - name: Restore database dir from backup
      shell:  "{{ postgresql_wal_g_binary_name ~ ' --config ' ~ postgresql_base_dir ~ '/' ~ postgresql_wal_g_restore_config_name ~ ' backup-fetch ' ~ postgresql_data_dir ~ ' ' ~ postgresql_wal_g_postgresql_pitr }}"
      become_user: postgres
    
    - name: Include PostgreSQL configuration
      vars:
        postgresql_restore_command: "{{ postgresql_wal_g_binary_name ~ ' --config ' ~ postgresql_base_dir ~ '/' ~ postgresql_wal_g_restore_config_name ~ ' wal-fetch %f %p' }}"
      include_tasks: config.yaml
    
    - name: Create recovery.signal file
      file:  
        name: "{{ postgresql_data_dir }}/recovery.signal"
        state: touch
      become_user: postgres
    
    - name: Create standby.signal file
      file:  
        name: "{{ postgresql_data_dir }}/standby.signal"
        state: touch
      become_user: postgres
    
    - name: Start PostgreSQL for recovery
      systemd:
        daemon_reload: true
        name: "{{ postgresql_unit_name }}"
        state: started
        masked: no
      register: postgresql_start_for_recovery
    
    - name: Ping PostgreSQL server
      vars:
        ansible_python_interpreter: '/usr/bin/env python3'
      community.postgresql.postgresql_ping:
        db: "{{ postgresql_superuser_db }}"
        login_user: "{{ postgresql_superuser_username }}"
        login_password: "{{ postgresql_superuser_password }}" 
      register: postgresql_ping
      until: postgresql_ping.is_available
      retries: 60
      delay: 20
    
    - name: debug
      debug:
        msg: "{{ postgresql_ping }}"

    - name: Stop PostgreSQL
      systemd:
        daemon_reload: true
        name: "{{ postgresql_unit_name }}"
        state: stopped
        masked: no
      register: postgresql_stop

    - name: Create promote trigger file
      file:  
        name: "{{ postgresql_promote_trigger_file }}"
        state: touch
      become_user: postgres