Upgrade Synapse (v1.66.0 -> 1.67.0) and remove `frontend_proxy` workers

`frontend_proxy` workers have been superseded by `generic_worker` workers.
Related to https://github.com/matrix-org/synapse/pull/13645

group_vars/matrix_servers

@@ -1762,7 +1762,6 @@ matrix_nginx_proxy_synapse_generic_worker_client_server_locations: "{{ matrix_sy
 matrix_nginx_proxy_synapse_generic_worker_federation_locations: "{{ matrix_synapse_workers_generic_worker_federation_endpoints }}"
 matrix_nginx_proxy_synapse_media_repository_locations: "{{matrix_synapse_workers_media_repository_endpoints|default([]) }}"
 matrix_nginx_proxy_synapse_user_dir_locations: "{{ matrix_synapse_workers_user_dir_endpoints|default([]) }}"
-matrix_nginx_proxy_synapse_frontend_proxy_locations: "{{ matrix_synapse_workers_frontend_proxy_endpoints|default([]) }}"
 
 matrix_nginx_proxy_systemd_wanted_services_list: |
   {{

roles/matrix-nginx-proxy/defaults/main.yml

@@ -625,7 +625,6 @@ matrix_nginx_proxy_synapse_generic_worker_client_server_locations: []
 matrix_nginx_proxy_synapse_generic_worker_federation_locations: []
 matrix_nginx_proxy_synapse_media_repository_locations: []
 matrix_nginx_proxy_synapse_user_dir_locations: []
-matrix_nginx_proxy_synapse_frontend_proxy_locations: []
 
 # synapse content caching
 matrix_nginx_proxy_synapse_cache_enabled: false

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-synapse.conf.j2

@@ -3,7 +3,6 @@
 {% set generic_workers = matrix_nginx_proxy_synapse_workers_list | selectattr('type', 'equalto', 'generic_worker') | list %}
 {% set media_repository_workers = matrix_nginx_proxy_synapse_workers_list | selectattr('type', 'equalto', 'media_repository') | list %}
 {% set user_dir_workers = matrix_nginx_proxy_synapse_workers_list | selectattr('type', 'equalto', 'user_dir') | list %}
-{% set frontend_proxy_workers = matrix_nginx_proxy_synapse_workers_list | selectattr('type', 'equalto', 'frontend_proxy') | list %}
 {% if matrix_nginx_proxy_synapse_workers_enabled %}
 	{% if matrix_nginx_proxy_synapse_cache_enabled %}
     	proxy_cache_path  {{ matrix_nginx_proxy_synapse_cache_path }} levels=1:2 keys_zone={{ matrix_nginx_proxy_synapse_cache_keys_zone_name }}:{{ matrix_nginx_proxy_synapse_cache_keys_zone_size }} inactive={{ matrix_nginx_proxy_synapse_cache_inactive_time }} max_size={{ matrix_nginx_proxy_synapse_cache_max_size_mb }}m;
@@ -26,18 +25,6 @@
 	}
 	{% endif %}
 
-	{% if frontend_proxy_workers %}
-	upstream frontend_proxy_upstream {
-		{% for worker in frontend_proxy_workers %}
-			{% if matrix_nginx_proxy_enabled %}
-				server "matrix-synapse-worker-{{ worker.type }}-{{ worker.instanceId }}:{{ worker.port }}";
-			{% else %}
-				server "127.0.0.1:{{ worker.port }}";
-			{% endif %}
-		{% endfor %}
-	}
-	{% endif %}
-
 	{% if media_repository_workers %}
 	upstream media_repository_upstream {
 		{% for worker in media_repository_workers %}
@@ -120,23 +107,6 @@ server {
 			}
 			{% endfor %}
 		{% endif %}
-
-		{% if frontend_proxy_workers %}
-			# https://github.com/matrix-org/synapse/blob/master/docs/workers.md#synapseappfrontend_proxy
-			{% for location in matrix_nginx_proxy_synapse_frontend_proxy_locations %}
-			location ~ {{ location }} {
-				proxy_pass http://frontend_proxy_upstream$request_uri;
-				proxy_set_header Host $host;
-			}
-			{% endfor %}
-			{% if matrix_nginx_proxy_synapse_presence_disabled %}
-			# FIXME: keep in sync with synapse workers documentation manually
-			location ~ ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/[^/]+/status {
-				proxy_pass http://frontend_proxy_upstream$request_uri;
-				proxy_set_header Host $host;
-			}
-			{% endif %}
-		{% endif %}
 		{# Workers redirects END #}
 	{% endif %}
 

roles/matrix-synapse/defaults/main.yml

@@ -9,7 +9,7 @@ matrix_synapse_container_image_self_build_repo: "https://github.com/matrix-org/s
 
 matrix_synapse_docker_image: "{{ matrix_synapse_docker_image_name_prefix }}matrixdotorg/synapse:{{ matrix_synapse_docker_image_tag }}"
 matrix_synapse_docker_image_name_prefix: "{{ 'localhost/' if matrix_synapse_container_image_self_build else matrix_container_global_registry_prefix }}"
-matrix_synapse_version: v1.66.0
+matrix_synapse_version: v1.67.0
 matrix_synapse_docker_image_tag: "{{ matrix_synapse_version }}"
 matrix_synapse_docker_image_force_pull: "{{ matrix_synapse_docker_image.endswith(':latest') }}"
 
@@ -398,7 +398,6 @@ matrix_synapse_workers_presets:
     federation_sender_workers_count: 1
     media_repository_workers_count: 0
     user_dir_workers_count: 0
-    frontend_proxy_workers_count: 0
   one-of-each:
     generic_workers_count: 1
     pusher_workers_count: 1
@@ -410,7 +409,6 @@ matrix_synapse_workers_presets:
     # user_dir workers are deprecated since Synapse v1.59. This will be removed.
     # See: https://github.com/matrix-org/synapse/blob/v1.59.0/docs/upgrade.md#deprecation-of-the-synapseappappservice-and-synapseappuser_dir-worker-application-types
     user_dir_workers_count: 0
-    frontend_proxy_workers_count: 1
 
 # Controls whether the matrix-synapse container exposes the various worker ports
 # (see `port` and `metrics_port` in `matrix_synapse_workers_enabled_list`) outside of the container.
@@ -452,10 +450,6 @@ matrix_synapse_workers_user_dir_workers_count: 0
 matrix_synapse_workers_user_dir_workers_port_range_start: 18661
 matrix_synapse_workers_user_dir_workers_metrics_range_start: 19661
 
-matrix_synapse_workers_frontend_proxy_workers_count: "{{ matrix_synapse_workers_presets[matrix_synapse_workers_preset]['frontend_proxy_workers_count'] }}"
-matrix_synapse_workers_frontend_proxy_workers_port_range_start: 18771
-matrix_synapse_workers_frontend_proxy_workers_metrics_range_start: 19771
-
 # Default list of workers to spawn.
 #
 # Unless you populate this manually, this list is dynamically generated

roles/matrix-synapse/tasks/synapse/workers/init.yml

@@ -56,16 +56,6 @@
   register: "matrix_synapse_workers_list_results_media_repository_workers"
   loop: "{{ range(0, matrix_synapse_workers_media_repository_workers_count | int) | list }}"
 
-- name: Build frontend_proxy workers
-  ansible.builtin.set_fact:
-    worker:
-      type: 'frontend_proxy'
-      instanceId: "{{ matrix_synapse_workers_frontend_proxy_workers_port_range_start + item }}"
-      port: "{{ matrix_synapse_workers_frontend_proxy_workers_port_range_start + item }}"
-      metrics_port: "{{ matrix_synapse_workers_frontend_proxy_workers_metrics_range_start + item }}"
-  register: "matrix_synapse_workers_list_results_frontend_proxy_workers"
-  loop: "{{ range(0, matrix_synapse_workers_frontend_proxy_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: |
@@ -79,8 +69,6 @@
       matrix_synapse_workers_list_results_appservice_workers.results
       +
       matrix_synapse_workers_list_results_media_repository_workers.results
-      +
-      matrix_synapse_workers_list_results_frontend_proxy_workers.results
     }}
 
 - ansible.builtin.set_fact:

roles/matrix-synapse/tasks/validate_config.yml

@@ -62,6 +62,9 @@
     - {'old': 'matrix_synapse_version_arm64', 'new': '<superseded by matrix_synapse_version - see https://github.com/matrix-org/synapse/pull/11810>'}
     - {'old': 'matrix_synapse_enable_group_creation', 'new': '<removed in Synapse v1.61.0 - use the new Spaces feature instead>'}
     - {'old': 'matrix_synapse_account_threepid_delegates_email', 'new': '<removed in Synapse v1.66.0 - make sure to configure email settings for Synapse - see https://matrix-org.github.io/synapse/v1.66/upgrade.html#delegation-of-email-validation-no-longer-supported>'}
+    - {'old': 'matrix_synapse_workers_frontend_proxy_workers_count', 'new': '<removed in favor of generic workers - see https://github.com/matrix-org/synapse/pull/13645>'}
+    - {'old': 'matrix_synapse_workers_frontend_proxy_workers_port_range_start', 'new': '<removed in favor of generic workers - see https://github.com/matrix-org/synapse/pull/13645>'}
+    - {'old': 'matrix_synapse_workers_frontend_proxy_workers_metrics_range_start', 'new': '<removed in favor of generic workers - see https://github.com/matrix-org/synapse/pull/13645>'}
 
 - name: (Deprecation) Catch and report renamed settings in matrix_synapse_configuration_extension_yaml
   ansible.builtin.fail:

roles/matrix-synapse/templates/synapse/worker.yaml.j2

@@ -11,7 +11,7 @@ worker_replication_http_port: {{ matrix_synapse_replication_http_port }}
 
 {% set http_resources = [] %}
 
-{% if matrix_synapse_worker_details.type in ['generic_worker', 'frontend_proxy', 'user_dir'] %}
+{% if matrix_synapse_worker_details.type in ['generic_worker', 'user_dir'] %}
   {% set http_resources = http_resources + ['client'] %}
 {% endif %}
 {% if matrix_synapse_worker_details.type in ['generic_worker'] %}
@@ -38,7 +38,7 @@ worker_listeners:
 {% endif %}
 {% endif %}
 
-{% if matrix_synapse_worker_details.type == 'frontend_proxy' %}
+{% if matrix_synapse_worker_details.type == 'generic_worker' %}
 worker_main_http_uri: http://matrix-synapse:{{ matrix_synapse_container_client_api_port }}
 {% endif %}
 

roles/matrix-synapse/vars/workers.yml

@@ -55,10 +55,12 @@ matrix_synapse_workers_generic_worker_endpoints:
   - ^/_matrix/client/(api/v1|r0|v3|unstable)/search$
 
   # Encryption requests
+  # Note that ^/_matrix/client/(r0|v3|unstable)/keys/upload/ requires `worker_main_http_uri`
   - ^/_matrix/client/(r0|v3|unstable)/keys/query$
   - ^/_matrix/client/(r0|v3|unstable)/keys/changes$
   - ^/_matrix/client/(r0|v3|unstable)/keys/claim$
   - ^/_matrix/client/(r0|v3|unstable)/room_keys/
+  - ^/_matrix/client/(r0|v3|unstable)/keys/upload/
 
   # Registration/login requests
   - ^/_matrix/client/(api/v1|r0|v3|unstable)/login$
@@ -172,7 +174,6 @@ matrix_synapse_workers_generic_worker_endpoints:
 
   # Additionally, the writing of specific streams (such as events) can be moved off
   # of the main process to a particular worker.
-  # (This is only supported with Redis-based replication.)
 
   # To enable this, the worker must have a HTTP replication listener configured,
   # have a `worker_name` and be listed in the `instance_map` config. The same worker
@@ -432,35 +433,9 @@ matrix_synapse_workers_user_dir_endpoints:
   # If `update_user_directory` is set to `false`, and this worker is not running,
   # the above endpoint may give outdated results.
 
-matrix_synapse_workers_frontend_proxy_endpoints:
-  # Proxies some frequently-requested client endpoints to add caching and remove
-  # load from the main synapse. It can handle REST endpoints matching the following
-  # regular expressions:
-
-  - ^/_matrix/client/(r0|v3|unstable)/keys/upload
-
-  # If `use_presence` is False in the homeserver config, it can also handle REST
-  # endpoints matching the following regular expressions:
-
-  # FIXME: ADDITIONAL CONDITIONS REQUIRED: to be enabled manually
-  # ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/[^/]+/status
-
-  # This "stub" presence handler will pass through `GET` request but make the
-  # `PUT` effectively a no-op.
-
-  # It will proxy any requests it cannot handle to the main synapse instance. It
-  # must therefore be configured with the location of the main instance, via
-  # the `worker_main_http_uri` setting in the `frontend_proxy` worker configuration
-  # file. For example:
-
-  # ```yaml
-  # worker_main_http_uri: http://127.0.0.1:8008
-  # ```
-
 matrix_synapse_workers_avail_list:
   - appservice
   - federation_sender
-  - frontend_proxy
   - generic_worker
   - media_repository
   - pusher