pgbouncer/tasks/main.yaml

---
- name: Make sure handlers are flushed immediately
  meta: flush_handlers

- name: Gather packages
  package_facts:
    manager: auto

- name: Load a variable file based on the OS type
  include_vars: "{{ lookup('first_found', params) }}"
  vars:
    params:
      files:
        - "{{ ansible_facts['distribution'] }}-{{ ansible_facts['distribution_major_version'] }}.yaml"
        - "{{ ansible_facts['distribution'] }}-{{ ansible_facts['distribution_version'] }}.yaml"
        - "{{ ansible_facts['os_family'] }}-{{ ansible_facts['distribution_major_version'] }}.yaml"
        - "{{ ansible_facts['os_family'] }}-{{ ansible_facts['distribution_version'] }}.yaml"
        - "{{ ansible_facts['distribution'] }}.yaml"
        - "{{ ansible_facts['os_family'] }}.yaml"
      paths:
        - "vars"
  tags: pgbouncer_vars

- name: "Set fact about PostgreSQL package"
  set_fact:
    pgbouncer_postgresql_package_name: "{{ ansible_facts.packages | list | select('match', pgbouncer_postgresql_package_name_regex) | first }}"

- name: "Get PostgreSQL major version"
  set_fact:
    pgbouncer_postgresql_major_version: "{{ ansible_facts.packages[pgbouncer_postgresql_package_name][0]['version'] | split('.') | first }}"
    pgbouncer_postgresql_minor_version: "{{ ansible_facts.packages[pgbouncer_postgresql_package_name][0]['version'] | split('.') | last }}"

- name: Mask pgbouncer before install
  systemd:
    name: pgbouncer
    masked: yes
  when:
    - ansible_os_family == "Debian"
    - "'pgbouncer' not in ansible_facts.packages"
  tags: pgbouncer_mask, pgbouncer

- name: Install pgbouncer package
  package:
    name: pgbouncer
  environment: "{{ proxy_env | default({}) }}"
  tags: pgbouncer_install, pgbouncer

- name: Ensure config directory "{{ pgbouncer_conf_dir }}" exist
  file:
    path: "{{ pgbouncer_conf_dir }}"
    state: directory
    owner: "{{ pgbouncer_systemd_user }}"
    group: "{{ pgbouncer_systemd_group }}"
    mode: 0750
  tags: pgbouncer_conf, pgbouncer

- name: Add pgbouncer systemd unit user and group override
  block:
    - name: Ensure override dir for pgbouncer exists
      file:
        path: /etc/systemd/system/pgbouncer.service.d
        state: directory

    - name: Set user and group for pgbouncer
      copy:
        dest: /etc/systemd/system/pgbouncer.service.d/override.conf
        content: |
          [Service]
          User=
          User={{ pgbouncer_systemd_user }}
          Group=
          Group={{ pgbouncer_systemd_group }}
          LimitNOFILE=1048576
          Restart=on-failure          

- name: Enable log rotation with logrotate
  copy:
    content: |
      "{{ pgbouncer_log_dir }}/{{ pgbouncer_log_name }}" {
             daily
             rotate 7
             copytruncate
             delaycompress
             compress
             notifempty
             missingok
             su root root
      }      
    dest: /etc/logrotate.d/pgbouncer
  tags: pgbouncer_logrotate, pgbouncer

- name: Configure pgbouncer.ini
  template:
    src: templates/pgbouncer.ini.j2
    dest: "{{ pgbouncer_conf_dir }}/{{ pgbouncer_conf_name }}"
    owner: "{{ pgbouncer_systemd_user }}"
    group: "{{ pgbouncer_systemd_group }}"
    mode: 0640
  notify: "restart pgbouncer"
  when: existing_pgcluster is not defined or not existing_pgcluster|bool
  tags: pgbouncer_conf, pgbouncer

- name: Ensure user and group applied to all files and dirs
  file: 
    path: "{{ item }}"
    owner: "{{ pgbouncer_systemd_user }}"
    group: "{{ pgbouncer_systemd_group }}"
    recurse: yes
    state: directory
  loop:
    - "{{ pgbouncer_conf_dir }}"
    - "{{ pgbouncer_log_dir }}"

- name: Ping PostgreSQL server
  community.postgresql.postgresql_ping:
    db: "{{ pgbouncer_postgresql_db }}"
    login_host: "{{ pgbouncer_postgresql_host }}"
    login_user: "{{ pgbouncer_postgresql_superuser_username }}"
    login_password: "{{ pgbouncer_postgresql_superuser_password }}" 
  register: postgresql_ping
  until: postgresql_ping.is_available
  retries: 60
  delay: 20

- name: Get auth user {{ pgbouncer_auth_user }} password hash
  community.postgresql.postgresql_query:
    db: "{{ pgbouncer_postgresql_db }}"
    login_host: "{{ pgbouncer_postgresql_host }}"
    login_user: "{{ pgbouncer_postgresql_superuser_username }}"
    login_password: "{{ pgbouncer_postgresql_superuser_password }}" 
    query: "{{ pgbouncer_postgresql_auth_query }}"
    positional_args: "{{ pgbouncer_auth_user }}"
  register: pgbouncer_postgresql_superuser_password_hash

- name: Create auth_file
  template:
    src: templates/userlist.txt.j2
    dest: "{{ pgbouncer_auth_file }}"
    owner: postgres
    group: postgres
    mode: 0640
  when: existing_pgcluster is not defined or not existing_pgcluster|bool
  tags: pgbouncer

- name: Ensure pgbouncer enabled and started 
  systemd:
    daemon_reload: true
    name: pgbouncer
    enabled: true
    state: started
    masked: no
  register: pgbouncer_enable_and_start
  tags: pgbouncer, pgbouncer_start