matrix-docker-ansible-deploy/roles/custom/matrix-synapse/tasks/inject_into_nginx_proxy.yml

---

# Unless `matrix_synapse_workers_enabled_list` is explicitly defined,
# we'll generate it dynamically.
- ansible.builtin.include_tasks: "{{ role_path }}/tasks/synapse/workers/init.yml"
  when: "matrix_synapse_workers_enabled | bool and matrix_synapse_workers_enabled_list | length == 0"

- name: Ensure workers are injected into various places
  ansible.builtin.include_tasks: "{{ role_path }}/tasks/synapse/workers/util/inject_worker.yml"
  with_items: "{{ matrix_synapse_workers_enabled_list }}"
  loop_control:
    loop_var: matrix_synapse_worker_details
  when: matrix_synapse_workers_enabled | bool

- when: matrix_synapse_metrics_proxying_enabled | bool
  block:
    - name: Fail if matrix-nginx-proxy role already executed
      ansible.builtin.fail:
        msg: >-
          Trying to append Synapse's reverse-proxying configuration to matrix-nginx-proxy,
          but it's pointless since the matrix-nginx-proxy role had already executed.
          To fix this, please change the order of roles in your playbook,
          so that the matrix-nginx-proxy role would run after the matrix-synapse role.
      when: matrix_nginx_proxy_role_executed | default(False) | bool

    - name: Generate synapse metrics proxying configuration for matrix-nginx-proxy (matrix.DOMAIN/metrics/synapse/main-process)
      ansible.builtin.set_fact:
        matrix_synapse_nginx_metrics_configuration_block: |
          location /metrics/synapse/main-process {
            {% if matrix_nginx_proxy_enabled | default(False) %}
              {# Use the embedded DNS resolver in Docker containers to discover the service #}
              resolver 127.0.0.11 valid=5s;
              set $backend "matrix-synapse:{{ matrix_synapse_metrics_port }}";
              proxy_pass http://$backend/_synapse/metrics;
            {% else %}
              {# Generic configuration for use outside of our container setup #}
              proxy_pass http://127.0.0.1:{{ matrix_synapse_metrics_port }}/_synapse/metrics;
            {% endif %}
          }

    - name: Register synapse metrics proxying configuration with matrix-nginx-proxy (matrix.DOMAIN/metrics/synapse/main-process)
      ansible.builtin.set_fact:
        matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks: |
          {{
            matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks | default([])
            +
            [matrix_synapse_nginx_metrics_configuration_block]
          }}

    - name: Generate synapse worker metrics proxying configuration for matrix-nginx-proxy (matrix.DOMAIN/metrics/synapse/worker)
      ansible.builtin.set_fact:
        matrix_synapse_worker_nginx_metrics_configuration_block: |
          {% for worker in matrix_synapse_workers_enabled_list %}
          {% if worker.metrics_port != 0 %}
          location /metrics/synapse/worker/{{ worker.id }} {
            resolver 127.0.0.11 valid=5s;
            set $backend "{{ worker.name }}:{{ worker.metrics_port }}";
            proxy_pass http://$backend/_synapse/metrics;
            proxy_set_header Host $host;
          }
          {% endif %}
          {% endfor %}
      when: matrix_synapse_workers_enabled_list | length > 0

    - name: Register synapse worker metrics proxying configuration with matrix-nginx-proxy (matrix.DOMAIN/metrics/synapse/worker)
      ansible.builtin.set_fact:
        matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks: |
          {{
            matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks | default([])
            +
            [matrix_synapse_worker_nginx_metrics_configuration_block]
          }}
      when: matrix_synapse_workers_enabled_list | length > 0