patroni/tasks/dynamic_config.yaml

---
- name: Merge Patroni dynamic parameters for backup
  set_fact:
    patroni_postgresql_dynamic_parameters: "{{ patroni_postgresql_dynamic_parameters | combine(patroni_postgresql_backup_parameters, recursive=true) }}"

- name: Propagate Patroni dynamic config
  copy:
    content: "{{ patroni_postgresql_dynamic_parameters | to_nice_json }}"
    dest: "/etc/patroni/dynamic.json"
    owner: "postgres"
    group: "postgres"
    mode: 0644
  register: patroni_dynamic_config_file

- name: Dynamic configuration parameters for Patroni
  when: patroni_dynamic_config_file.changed
  block:
    - name: Wait for Patroni leader
      vars:
        _query: 'json.members[].role'
      ansible.builtin.uri:
        url: "{{ 'https://' if patroni_ssl else 'http://' }}{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}:{{ patroni_restapi_listen_port }}/cluster"
        method: GET
        body_format: json
        status_code:
          - 200
          - 503
      register: patroni_role
      until: patroni_role | json_query(_query) | regex_findall('leader') | count > 0
      retries: 100
      delay: 10

    - name: Get Patroni nodes roles
      ansible.builtin.uri:
        url: "{{ 'https://' if patroni_ssl else 'http://' }}{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}:{{ patroni_restapi_listen_port }}"
        method: GET
        body_format: json
        status_code:
          - 200
          - 503
      register: patroni_role

    - name: Set fact about roles
      set_fact:
        role: "{{ patroni_role.json.role }}"

    - name: Apply dynamic configuration parameters for Patroni
      ansible.builtin.uri:
        url: "{{ 'https://' if patroni_ssl else 'http://' }}{{ hostvars[inventory_hostname]['ansible_default_ipv4']['address'] }}:{{ patroni_restapi_listen_port }}/config"
        user: "{{ patroni_restapi_username }}"
        password: "{{ patroni_restapi_password }}"
        method: PATCH
        body: "{{ patroni_postgresql_dynamic_parameters | to_nice_json }}"
        force_basic_auth: yes
      when:
        - "hostvars[inventory_hostname]['role'] == 'master'"
  rescue:
    - include_tasks: dynamic_config.yaml