Remove dead metrics support from the mautrix-telegram bridge

The bridge lost its metrics endpoint when it was rewritten on top of
bridgev2, so the playbook was publishing a Traefik route which could
only ever yield an HTTP 502.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/5487

group_vars/matrix_servers

@@ -2083,9 +2083,6 @@ matrix_bridge_mautrix_telegram_container_labels_traefik_docker_network: "{{ matr
 matrix_bridge_mautrix_telegram_container_labels_traefik_entrypoints: "{{ traefik_entrypoint_primary }}"
 matrix_bridge_mautrix_telegram_container_labels_traefik_tls_certResolver: "{{ traefik_certResolver_primary }}"
 
-matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_enabled: "{{ matrix_metrics_exposure_http_basic_auth_enabled }}"
-matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_users: "{{ matrix_metrics_exposure_http_basic_auth_users }}"
-
 matrix_bridge_mautrix_telegram_appservice_token: "{{ (matrix_homeserver_generic_secret_key + ':telegr.as.token') | hash('sha512') | to_uuid }}"
 
 matrix_bridge_mautrix_telegram_homeserver_domain: "{{ matrix_domain }}"
@@ -2105,12 +2102,6 @@ matrix_bridge_mautrix_telegram_double_puppet_secrets_auto: |-
     else {}
   }}
 
-matrix_bridge_mautrix_telegram_metrics_enabled: "{{ prometheus_enabled or matrix_metrics_exposure_enabled }}"
-
-matrix_bridge_mautrix_telegram_metrics_proxying_enabled: "{{ matrix_bridge_mautrix_telegram_metrics_enabled and matrix_metrics_exposure_enabled }}"
-matrix_bridge_mautrix_telegram_metrics_proxying_hostname: "{{ matrix_metrics_exposure_hostname }}"
-matrix_bridge_mautrix_telegram_metrics_proxying_path_prefix: "{{ matrix_metrics_exposure_path_prefix }}/mautrix-telegram"
-
 matrix_bridge_mautrix_telegram_scheme: "{{ 'https' if matrix_playbook_ssl_enabled else 'http' }}"
 matrix_bridge_mautrix_telegram_exposure_enabled: "{{ matrix_bridges_exposure_enabled }}"
 matrix_bridge_mautrix_telegram_exposure_hostname: "{{ matrix_bridges_exposure_hostname }}"

roles/custom/matrix-bridge-mautrix-telegram/defaults/main.yml

@@ -77,17 +77,6 @@ matrix_bridge_mautrix_telegram_container_labels_traefik_docker_network: "{{ matr
 matrix_bridge_mautrix_telegram_container_labels_traefik_entrypoints: web-secure
 matrix_bridge_mautrix_telegram_container_labels_traefik_tls_certResolver: default  # noqa var-naming
 
-# Controls whether labels will be added that expose mautrix-telegram's metrics
-matrix_bridge_mautrix_telegram_container_labels_metrics_enabled: "{{ matrix_bridge_mautrix_telegram_metrics_enabled and matrix_bridge_mautrix_telegram_metrics_proxying_enabled }}"
-matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_rule: "Host(`{{ matrix_bridge_mautrix_telegram_metrics_proxying_hostname }}`) && PathPrefix(`{{ matrix_bridge_mautrix_telegram_metrics_proxying_path_prefix }}`)"
-matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_priority: 0
-matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_entrypoints: "{{ matrix_bridge_mautrix_telegram_container_labels_traefik_entrypoints }}"
-matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls: "{{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_entrypoints != 'web' }}"
-matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls_certResolver: "{{ matrix_bridge_mautrix_telegram_container_labels_traefik_tls_certResolver }}"  # noqa var-naming
-matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_enabled: false
-# See: https://doc.traefik.io/traefik/middlewares/http/basicauth/#users
-matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_users: ''
-
 # Controls whether labels will be added that expose mautrix-telegram's HTTP API
 # (used by tools like mautrix-manager for bridge login) at `https://<hostname><path_prefix>`.
 matrix_bridge_mautrix_telegram_container_labels_exposure_enabled: "{{ matrix_bridge_mautrix_telegram_exposure_enabled }}"
@@ -131,16 +120,6 @@ matrix_bridge_mautrix_telegram_logging_level: 'warn'
 # If false, created portal rooms will never be federated.
 matrix_bridge_mautrix_telegram_federate_rooms: true
 
-# Whether or not metrics endpoint should be enabled.
-# Enabling them is usually enough for a local (in-container) Prometheus to consume them.
-# If metrics need to be consumed by another (external) Prometheus server, consider exposing them via `matrix_bridge_mautrix_telegram_metrics_proxying_enabled`.
-matrix_bridge_mautrix_telegram_metrics_enabled: false
-
-# Controls whether metrics should be proxied (exposed) on a public URL
-matrix_bridge_mautrix_telegram_metrics_proxying_enabled: false
-matrix_bridge_mautrix_telegram_metrics_proxying_hostname: ''
-matrix_bridge_mautrix_telegram_metrics_proxying_path_prefix: ''
-
 # Controls whether mautrix-telegram's HTTP API is exposed publicly (used by tools like mautrix-manager for bridge login).
 matrix_bridge_mautrix_telegram_exposure_enabled: false
 matrix_bridge_mautrix_telegram_exposure_hostname: ''

roles/custom/matrix-bridge-mautrix-telegram/tasks/validate_config.yml

@@ -80,6 +80,18 @@
     - {'old': 'matrix_telegram_lottieconverter_docker_repo_version', 'new': '<removed (lottieconverter is now bundled into the mautrix-telegram image)>'}
     - {'old': 'matrix_telegram_lottieconverter_docker_src_files_path', 'new': '<removed (lottieconverter is now bundled into the mautrix-telegram image)>'}
     - {'old': 'matrix_telegram_lottieconverter_docker_image', 'new': '<removed (lottieconverter is now bundled into the mautrix-telegram image)>'}
+    - {'old': 'matrix_bridge_mautrix_telegram_metrics_enabled', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_metrics_proxying_enabled', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_metrics_proxying_hostname', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_metrics_proxying_path_prefix', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_enabled', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_rule', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_priority', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_entrypoints', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls_certResolver', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_enabled', 'new': '<removed> (mautrix-telegram does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_users', 'new': '<removed> (mautrix-telegram does not support metrics)'}
 
 - name: Fail if required mautrix-telegram settings not defined
   ansible.builtin.fail:
@@ -94,8 +106,6 @@
     - {'name': 'matrix_bridge_mautrix_telegram_homeserver_token', when: true}
     - {'name': 'matrix_bridge_mautrix_telegram_container_network', when: true}
     - {'name': 'matrix_bridge_mautrix_telegram_database_hostname', when: "{{ matrix_bridge_mautrix_telegram_database_engine == 'postgres' }}"}
-    - {'name': 'matrix_bridge_mautrix_telegram_metrics_proxying_hostname', when: "{{ matrix_bridge_mautrix_telegram_metrics_proxying_enabled }}"}
-    - {'name': 'matrix_bridge_mautrix_telegram_metrics_proxying_path_prefix', when: "{{ matrix_bridge_mautrix_telegram_metrics_proxying_enabled }}"}
 
 # Temporary workaround for an upstream SQLite legacy-migration bug in mautrix-telegram v0.2604.0.
 # See the separate task file for details; the whole file (and this include) can be deleted once

roles/custom/matrix-bridge-mautrix-telegram/templates/labels.j2

@@ -11,41 +11,6 @@ traefik.enable=true
 traefik.docker.network={{ matrix_bridge_mautrix_telegram_container_labels_traefik_docker_network }}
 {% endif %}
 
-traefik.http.services.matrix-mautrix-telegram-metrics.loadbalancer.server.port=8001
-
-{% if matrix_bridge_mautrix_telegram_container_labels_metrics_enabled %}
-############################################################
-#                                                          #
-# Metrics                                                  #
-#                                                          #
-############################################################
-
-{% if matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_enabled %}
-traefik.http.middlewares.matrix-mautrix-telegram-metrics-basic-auth.basicauth.users={{ matrix_bridge_mautrix_telegram_container_labels_metrics_middleware_basic_auth_users }}
-traefik.http.routers.matrix-mautrix-telegram-metrics.middlewares=matrix-mautrix-telegram-metrics-basic-auth
-{% endif %}
-
-traefik.http.routers.matrix-mautrix-telegram-metrics.rule={{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_rule }}
-
-{% if matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_priority | int > 0 %}
-traefik.http.routers.matrix-mautrix-telegram-metrics.priority={{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_priority }}
-{% endif %}
-
-traefik.http.routers.matrix-mautrix-telegram-metrics.service=matrix-mautrix-telegram-metrics
-traefik.http.routers.matrix-mautrix-telegram-metrics.entrypoints={{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_entrypoints }}
-
-traefik.http.routers.matrix-mautrix-telegram-metrics.tls={{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls | to_json }}
-{% if matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls %}
-traefik.http.routers.matrix-mautrix-telegram-metrics.tls.certResolver={{ matrix_bridge_mautrix_telegram_container_labels_metrics_traefik_tls_certResolver }}
-{% endif %}
-
-############################################################
-#                                                          #
-# /Metrics                                                 #
-#                                                          #
-############################################################
-{% endif %}
-
 {% if matrix_bridge_mautrix_telegram_container_labels_exposure_enabled %}
 ############################################################
 #                                                          #