homelab/ansible/playbooks/database.yml

---
- name: Database playbook
  hosts: database
  vars:
  # certbot_force: true
  pre_tasks:
    - name: Add database member to pg_hba replication
      ansible.builtin.set_fact:
        postgresql_hba_entries: "{{ postgresql_hba_entries + [\
          {'type':'host', \
          'database': 'replication',\
          'user':'repli',\
          'address':hostvars[item]['ansible_'+default_interface]['ipv4']['address']+'/32',\
          'auth_method':'trust'}] }}"
      loop: '{{ groups.database }}'
  roles:
    - role: ansible-role-postgresql
      become: true
  tasks:
    - name: Launch replication
      ansible.builtin.command: pg_basebackup -D /var/lib/postgres/data  -h {{groups["database_active"]|first}} -U repli -Fp -Xs -P -R -w
      args:
        creates: /var/lib/postgres/data/postgresql.conf
      become: true
      become_user: postgres
      when: inventory_hostname in groups["database_standby"] 
    - name: Ensure PostgreSQL is started and enabled on boot.
      ansible.builtin.service:
        name: '{{ postgresql_daemon }}'
        state: '{{ postgresql_service_state }}'
        enabled: '{{ postgresql_service_enabled }}'
      become: true
    - name: Install pg_vector.rs
      aur:
        name: pgvecto.rs-bin
      become: true
      become_user: aur_builder
    - name: Set Postgress shared libraries
      community.postgresql.postgresql_set:
        name: shared_preload_libraries
        value: vectors.so
      become: true
      become_user: postgres
      when: inventory_hostname in groups["database_active"]
      notify: Restart postgresql
    - name: Set Postgress shared libraries
      community.postgresql.postgresql_set:
        name: search_path
        value: '$user, public, vectors'
      become: true
      become_user: postgres
      when: inventory_hostname in groups["database_active"]