Remove dead metrics support from the mautrix-linkedin bridge

Bridges based on bridgev2 no longer expose a metrics endpoint, 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

@@ -2397,9 +2397,6 @@ matrix_bridge_mautrix_linkedin_container_labels_traefik_docker_network: "{{ matr
 matrix_bridge_mautrix_linkedin_container_labels_traefik_entrypoints: "{{ traefik_entrypoint_primary }}"
 matrix_bridge_mautrix_linkedin_container_labels_traefik_tls_certResolver: "{{ traefik_certResolver_primary }}"
 
-matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_enabled: "{{ matrix_metrics_exposure_http_basic_auth_enabled }}"
-matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_users: "{{ matrix_metrics_exposure_http_basic_auth_users }}"
-
 matrix_bridge_mautrix_linkedin_appservice_token: "{{ (matrix_homeserver_generic_secret_key + ':linkedin.as.token') | hash('sha512') | to_uuid }}"
 
 matrix_bridge_mautrix_linkedin_homeserver_address: "{{ matrix_addons_homeserver_client_api_url }}"
@@ -2418,12 +2415,6 @@ matrix_bridge_mautrix_linkedin_double_puppet_secrets_auto: |-
     else {}
   }}
 
-matrix_bridge_mautrix_linkedin_metrics_enabled: "{{ prometheus_enabled or matrix_metrics_exposure_enabled }}"
-
-matrix_bridge_mautrix_linkedin_metrics_proxying_enabled: "{{ matrix_bridge_mautrix_linkedin_metrics_enabled and matrix_metrics_exposure_enabled }}"
-matrix_bridge_mautrix_linkedin_metrics_proxying_hostname: "{{ matrix_metrics_exposure_hostname }}"
-matrix_bridge_mautrix_linkedin_metrics_proxying_path_prefix: "{{ matrix_metrics_exposure_path_prefix }}/mautrix-linkedin"
-
 matrix_bridge_mautrix_linkedin_scheme: "{{ 'https' if matrix_playbook_ssl_enabled else 'http' }}"
 matrix_bridge_mautrix_linkedin_exposure_enabled: "{{ matrix_bridges_exposure_enabled }}"
 matrix_bridge_mautrix_linkedin_exposure_hostname: "{{ matrix_bridges_exposure_hostname }}"

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

@@ -67,17 +67,6 @@ matrix_bridge_mautrix_linkedin_container_labels_traefik_docker_network: "{{ matr
 matrix_bridge_mautrix_linkedin_container_labels_traefik_entrypoints: web-secure
 matrix_bridge_mautrix_linkedin_container_labels_traefik_tls_certResolver: default  # noqa var-naming
 
-# Controls whether labels will be added that expose mautrix-linkedin' metrics
-matrix_bridge_mautrix_linkedin_container_labels_metrics_enabled: "{{ matrix_bridge_mautrix_linkedin_metrics_enabled and matrix_bridge_mautrix_linkedin_metrics_proxying_enabled }}"
-matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_rule: "Host(`{{ matrix_bridge_mautrix_linkedin_metrics_proxying_hostname }}`) && PathPrefix(`{{ matrix_bridge_mautrix_linkedin_metrics_proxying_path_prefix }}`)"
-matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_priority: 0
-matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_entrypoints: "{{ matrix_bridge_mautrix_linkedin_container_labels_traefik_entrypoints }}"
-matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls: "{{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_entrypoints != 'web' }}"
-matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls_certResolver: "{{ matrix_bridge_mautrix_linkedin_container_labels_traefik_tls_certResolver }}"  # noqa var-naming
-matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_enabled: false
-# See: https://doc.traefik.io/traefik/middlewares/http/basicauth/#users
-matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_users: ''
-
 # Controls whether labels will be added that expose mautrix-linkedin' HTTP API
 # (used by tools like mautrix-manager for bridge login) at `https://<hostname><path_prefix>`.
 matrix_bridge_mautrix_linkedin_container_labels_exposure_enabled: "{{ matrix_bridge_mautrix_linkedin_exposure_enabled }}"
@@ -121,16 +110,6 @@ matrix_bridge_mautrix_linkedin_logging_level: 'warn'
 # If false, created portal rooms will never be federated.
 matrix_bridge_mautrix_linkedin_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_linkedin_metrics_proxying_enabled`.
-matrix_bridge_mautrix_linkedin_metrics_enabled: false
-
-# Controls whether metrics should be proxied (exposed) on a public URL.
-matrix_bridge_mautrix_linkedin_metrics_proxying_enabled: false
-matrix_bridge_mautrix_linkedin_metrics_proxying_hostname: ''
-matrix_bridge_mautrix_linkedin_metrics_proxying_path_prefix: ''
-
 # Controls whether mautrix-linkedin' HTTP API is exposed publicly (used by tools like mautrix-manager for bridge login).
 matrix_bridge_mautrix_linkedin_exposure_enabled: false
 matrix_bridge_mautrix_linkedin_exposure_hostname: ''

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

@@ -11,7 +11,19 @@
       Your configuration contains a variable, which now has a different name.
       Please rename the variable (`{{ item.old }}` -> `{{ item.new }}`) on your configuration file (vars.yml).
   when: "lookup('ansible.builtin.varnames', ('^' + item.old + '$'), wantlist=True) | length > 0"
-  with_items: []
+  with_items:
+    - {'old': 'matrix_bridge_mautrix_linkedin_metrics_enabled', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_metrics_proxying_enabled', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_metrics_proxying_hostname', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_metrics_proxying_path_prefix', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_enabled', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_rule', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_priority', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_entrypoints', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls_certResolver', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_enabled', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
+    - {'old': 'matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_users', 'new': '<removed> (mautrix-linkedin does not support metrics)'}
 
 - name: Fail if required mautrix-linkedin settings not defined
   ansible.builtin.fail:
@@ -23,8 +35,6 @@
     - {'name': 'matrix_bridge_mautrix_linkedin_homeserver_address', when: true}
     - {'name': 'matrix_bridge_mautrix_linkedin_homeserver_token', when: true}
     - {'name': 'matrix_bridge_mautrix_linkedin_database_hostname', when: "{{ matrix_bridge_mautrix_linkedin_database_engine == 'postgres' }}"}
-    - {'name': 'matrix_bridge_mautrix_linkedin_metrics_proxying_hostname', when: "{{ matrix_bridge_mautrix_linkedin_metrics_proxying_enabled }}"}
-    - {'name': 'matrix_bridge_mautrix_linkedin_metrics_proxying_path_prefix', when: "{{ matrix_bridge_mautrix_linkedin_metrics_proxying_enabled }}"}
     - {'name': 'matrix_bridge_mautrix_linkedin_container_network', when: true}
 
 - name: Fail if the deprecated beeper-linkedin bridge is also enabled

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

@@ -12,41 +12,6 @@ traefik.enable=true
 traefik.docker.network={{ matrix_bridge_mautrix_linkedin_container_labels_traefik_docker_network }}
 {% endif %}
 
-traefik.http.services.matrix-mautrix-linkedin-metrics.loadbalancer.server.port=8001
-
-{% if matrix_bridge_mautrix_linkedin_container_labels_metrics_enabled %}
-############################################################
-#                                                          #
-# Metrics                                                  #
-#                                                          #
-############################################################
-
-{% if matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_enabled %}
-traefik.http.middlewares.matrix-mautrix-linkedin-metrics-basic-auth.basicauth.users={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_middleware_basic_auth_users }}
-traefik.http.routers.matrix-mautrix-linkedin-metrics.middlewares=matrix-mautrix-linkedin-metrics-basic-auth
-{% endif %}
-
-traefik.http.routers.matrix-mautrix-linkedin-metrics.rule={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_rule }}
-
-{% if matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_priority | int > 0 %}
-traefik.http.routers.matrix-mautrix-linkedin-metrics.priority={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_priority }}
-{% endif %}
-
-traefik.http.routers.matrix-mautrix-linkedin-metrics.service=matrix-mautrix-linkedin-metrics
-traefik.http.routers.matrix-mautrix-linkedin-metrics.entrypoints={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_entrypoints }}
-
-traefik.http.routers.matrix-mautrix-linkedin-metrics.tls={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls | to_json }}
-{% if matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls %}
-traefik.http.routers.matrix-mautrix-linkedin-metrics.tls.certResolver={{ matrix_bridge_mautrix_linkedin_container_labels_metrics_traefik_tls_certResolver }}
-{% endif %}
-
-############################################################
-#                                                          #
-# /Metrics                                                 #
-#                                                          #
-############################################################
-{% endif %}
-
 {% if matrix_bridge_mautrix_linkedin_container_labels_exposure_enabled %}
 ############################################################
 #                                                          #