matrix-docker-ansible-deploy/roles/matrix-synapse/tasks/synapse/workers/init.yml

---
# Below is a huge hack for dynamically building a list of workers and finally assigning it to `matrix_synapse_workers_enabled_list`.
#
# set_fact within a loop does not work reliably in Ansible (it only executes on the first iteration for some reason),
# so we're forced to do something much uglier.

- name: Build generic workers
  ansible.builtin.set_fact:
    worker:
      id: "generic-worker-{{ item }}"
      name: "matrix-synapse-worker-generic-{{ item }}"
      type: 'generic_worker'
      app: 'generic_worker'
      webserving: true
      port: "{{ matrix_synapse_workers_generic_workers_port_range_start + item }}"
      metrics_port: "{{ matrix_synapse_workers_generic_workers_metrics_range_start + item }}"
  register: "matrix_synapse_workers_list_results_generic_workers"
  loop: "{{ range(0, matrix_synapse_workers_generic_workers_count | int) | list }}"

- name: Build stream writer workers
  ansible.builtin.set_fact:
    worker:
      id: "stream-writer-{{ item }}-{{ item.stream }}"
      # Names must not include understores. Certain stream writer streams (to_device, account_data, ..) do, so we fix them up.
      name: "matrix-synapse-worker-stream-writer-{{ idx }}-{{ item.stream | replace('_', '-') }}"
      type: 'stream_writer'
      app: "generic_worker"
      webserving: "{{ item.stream in matrix_synapse_workers_webserving_stream_writer_types }}"
      stream_writer_stream: "{{ item.stream }}"
      port: "{{ matrix_synapse_workers_stream_writer_workers_http_port_range_start + idx }}"
      replication_port: "{{ matrix_synapse_workers_stream_writer_workers_replication_port_range_start + idx }}"
      metrics_port: "{{ matrix_synapse_workers_stream_writer_workers_metrics_range_start + idx }}"
  register: "matrix_synapse_workers_list_results_stream_writer_workers"
  loop: "{{ matrix_synapse_workers_stream_writers }}"
  loop_control:
    index_var: idx

- name: Populate matrix_synapse_stream_writers from enabled stream writer workers list
  ansible.builtin.set_fact:
    matrix_synapse_stream_writers: "{{ matrix_synapse_stream_writers | combine ({item.ansible_facts.worker.stream_writer_stream: [item.ansible_facts.worker.name]}) }}"
  with_items: "{{ matrix_synapse_workers_list_results_stream_writer_workers.results }}"

- name: Build federation sender workers
  ansible.builtin.set_fact:
    worker:
      id: "federation-sender-{{ item }}"
      name: "matrix-synapse-worker-federation-sender-{{ item }}"
      type: 'federation_sender'
      app: 'federation_sender'
      webserving: false
      port: 0
      metrics_port: "{{ matrix_synapse_workers_federation_sender_workers_metrics_range_start + item }}"
  register: "matrix_synapse_workers_list_results_federation_sender_workers"
  loop: "{{ range(0, matrix_synapse_workers_federation_sender_workers_count | int) | list }}"

# This type of worker can only have a count of 1, at most
- name: Build pusher workers
  ansible.builtin.set_fact:
    worker:
      id: "pusher-{{ item }}"
      name: "matrix-synapse-worker-pusher-{{ item }}"
      type: 'pusher'
      app: 'pusher'
      webserving: false
      port: 0
      metrics_port: "{{ matrix_synapse_workers_pusher_workers_metrics_range_start + item }}"
  register: "matrix_synapse_workers_list_results_pusher_workers"
  loop: "{{ range(0, matrix_synapse_workers_pusher_workers_count | int) | list }}"

# This type of worker can only have a count of 1, at most
- name: Build appservice workers
  ansible.builtin.set_fact:
    worker:
      id: "appservice-{{ item }}"
      name: "matrix-synapse-worker-appservice-{{ item }}"
      type: 'appservice'
      app: 'appservice'
      webserving: false
      port: 0
      metrics_port: "{{ matrix_synapse_workers_appservice_workers_metrics_range_start + item }}"
  register: "matrix_synapse_workers_list_results_appservice_workers"
  loop: "{{ range(0, matrix_synapse_workers_appservice_workers_count | int) | list }}"

- name: Build media_repository workers
  ansible.builtin.set_fact:
    worker:
      id: "media-repository-{{ item }}"
      name: "matrix-synapse-worker-media-repository-{{ item }}"
      type: 'media_repository'
      app: 'media_repository'
      webserving: true
      port: "{{ matrix_synapse_workers_media_repository_workers_port_range_start + item }}"
      metrics_port: "{{ matrix_synapse_workers_media_repository_workers_metrics_range_start + item }}"
  register: "matrix_synapse_workers_list_results_media_repository_workers"
  loop: "{{ range(0, matrix_synapse_workers_media_repository_workers_count | int) | list }}"

- ansible.builtin.set_fact:
    matrix_synapse_dynamic_workers_list: "{{ matrix_synapse_dynamic_workers_list | default([]) + [item.ansible_facts.worker] }}"
  with_items: |
    {{
      matrix_synapse_workers_list_results_generic_workers.results
      +
      matrix_synapse_workers_list_results_stream_writer_workers.results
      +
      matrix_synapse_workers_list_results_federation_sender_workers.results
      +
      matrix_synapse_workers_list_results_pusher_workers.results
      +
      matrix_synapse_workers_list_results_appservice_workers.results
      +
      matrix_synapse_workers_list_results_media_repository_workers.results
    }}    

- ansible.builtin.set_fact:
    matrix_synapse_workers_enabled_list: "{{ matrix_synapse_dynamic_workers_list }}"