mautrix-whatsapp: expose bridge HTTP API (for mautrix-manager and similar)

Auto-generate the provisioning shared secret (to enable the provisioning
API), route the whole mautrix-whatsapp HTTP port via Traefik under
`<matrix-fqn>/bridges/whatsapp`, and populate appservice.public_address,
reusing the matrix_bridges_exposure_* mechanism.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

group_vars/matrix_servers

@@ -2403,6 +2403,7 @@ matrix_mautrix_whatsapp_appservice_token: "{{ (matrix_homeserver_generic_secret_
 
 matrix_mautrix_whatsapp_homeserver_address: "{{ matrix_addons_homeserver_client_api_url }}"
 matrix_mautrix_whatsapp_homeserver_token: "{{ (matrix_homeserver_generic_secret_key + ':wa.hs.token') | hash('sha512') | to_uuid }}"
+matrix_mautrix_whatsapp_provisioning_shared_secret: "{{ (matrix_homeserver_generic_secret_key + ':wa.prov') | hash('sha512') | to_uuid }}"
 
 matrix_mautrix_whatsapp_homeserver_async_media: "{{ matrix_homeserver_implementation in ['synapse'] }}"
 
@@ -2421,6 +2422,11 @@ matrix_mautrix_whatsapp_metrics_proxying_enabled: "{{ matrix_mautrix_whatsapp_me
 matrix_mautrix_whatsapp_metrics_proxying_hostname: "{{ matrix_metrics_exposure_hostname }}"
 matrix_mautrix_whatsapp_metrics_proxying_path_prefix: "{{ matrix_metrics_exposure_path_prefix }}/mautrix-whatsapp"
 
+matrix_mautrix_whatsapp_scheme: "{{ 'https' if matrix_playbook_ssl_enabled else 'http' }}"
+matrix_mautrix_whatsapp_exposure_enabled: "{{ matrix_bridges_exposure_enabled }}"
+matrix_mautrix_whatsapp_exposure_hostname: "{{ matrix_bridges_exposure_hostname }}"
+matrix_mautrix_whatsapp_exposure_path_prefix: "{{ matrix_bridges_exposure_path_prefix }}/whatsapp"
+
 # Postgres is the default, except if not using internal Postgres server
 matrix_mautrix_whatsapp_database_engine: "{{ 'postgres' if postgres_enabled else 'sqlite' }}"
 matrix_mautrix_whatsapp_database_hostname: "{{ postgres_connection_hostname if postgres_enabled else '' }}"

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

@@ -48,6 +48,13 @@ matrix_mautrix_whatsapp_homeserver_domain: "{{ matrix_domain }}"
 matrix_mautrix_whatsapp_homeserver_async_media: false
 matrix_mautrix_whatsapp_appservice_address: "http://matrix-mautrix-whatsapp:8080"
 
+# Scheme of the bridge's public address (see `matrix_mautrix_whatsapp_bridge_public_address`).
+matrix_mautrix_whatsapp_scheme: https
+
+# The public base URL at which this bridge's HTTP API is reachable from outside (when exposed).
+# Used for the provisioning API's external-server (OpenID) flow and for public media links.
+matrix_mautrix_whatsapp_bridge_public_address: "{{ (matrix_mautrix_whatsapp_scheme + '://' + matrix_mautrix_whatsapp_exposure_hostname + matrix_mautrix_whatsapp_exposure_path_prefix) if matrix_mautrix_whatsapp_exposure_enabled else '' }}"
+
 matrix_mautrix_whatsapp_msc4190_enabled: "{{ matrix_bridges_msc4190_enabled }}"
 matrix_mautrix_whatsapp_self_sign_enabled: "{{ matrix_bridges_self_sign_enabled }}"
 
@@ -81,6 +88,15 @@ matrix_mautrix_whatsapp_container_labels_metrics_middleware_basic_auth_enabled:
 # See: https://doc.traefik.io/traefik/middlewares/http/basicauth/#users
 matrix_mautrix_whatsapp_container_labels_metrics_middleware_basic_auth_users: ''
 
+# Controls whether labels will be added that expose mautrix-whatsapp's HTTP API
+# (used by tools like mautrix-manager for bridge login) at `https://<hostname><path_prefix>`.
+matrix_mautrix_whatsapp_container_labels_exposure_enabled: "{{ matrix_mautrix_whatsapp_exposure_enabled }}"
+matrix_mautrix_whatsapp_container_labels_exposure_traefik_rule: "Host(`{{ matrix_mautrix_whatsapp_exposure_hostname }}`) && PathPrefix(`{{ matrix_mautrix_whatsapp_exposure_path_prefix }}`)"
+matrix_mautrix_whatsapp_container_labels_exposure_traefik_priority: 0
+matrix_mautrix_whatsapp_container_labels_exposure_traefik_entrypoints: "{{ matrix_mautrix_whatsapp_container_labels_traefik_entrypoints }}"
+matrix_mautrix_whatsapp_container_labels_exposure_traefik_tls: "{{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_entrypoints != 'web' }}"
+matrix_mautrix_whatsapp_container_labels_exposure_traefik_tls_certResolver: "{{ matrix_mautrix_whatsapp_container_labels_traefik_tls_certResolver }}"  # noqa var-naming
+
 # matrix_mautrix_whatsapp_container_labels_additional_labels contains a multiline string with additional labels to add to the container label file.
 # See `../templates/labels.j2` for details.
 #
@@ -125,6 +141,11 @@ matrix_mautrix_whatsapp_metrics_proxying_enabled: false
 matrix_mautrix_whatsapp_metrics_proxying_hostname: ''
 matrix_mautrix_whatsapp_metrics_proxying_path_prefix: ''
 
+# Controls whether mautrix-whatsapp's HTTP API is exposed publicly (used by tools like mautrix-manager for bridge login).
+matrix_mautrix_whatsapp_exposure_enabled: false
+matrix_mautrix_whatsapp_exposure_hostname: ''
+matrix_mautrix_whatsapp_exposure_path_prefix: ''
+
 # Database-related configuration fields.
 #
 # To use SQLite, stick to these defaults.

roles/custom/matrix-bridge-mautrix-whatsapp/templates/config.yaml.j2

@@ -269,7 +269,7 @@ appservice:
     # A public address that external services can use to reach this appservice.
     # This is only needed for things like public media. A reverse proxy is generally necessary when using this field.
     # This value doesn't affect the registration file.
-    public_address: ""
+    public_address: {{ matrix_mautrix_whatsapp_bridge_public_address | to_json }}
 
     # The hostname and port where this appservice should listen.
     # For Docker, you generally have to change the hostname to 0.0.0.0.

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

@@ -46,6 +46,39 @@ traefik.http.routers.matrix-mautrix-whatsapp-metrics.tls.certResolver={{ matrix_
 ############################################################
 {% endif %}
 
+{% if matrix_mautrix_whatsapp_container_labels_exposure_enabled %}
+############################################################
+#                                                          #
+# Bridge API exposure                                      #
+#                                                          #
+############################################################
+
+traefik.http.services.matrix-mautrix-whatsapp-exposure.loadbalancer.server.port=8080
+
+traefik.http.middlewares.matrix-mautrix-whatsapp-exposure-strip-prefix.stripprefix.prefixes={{ matrix_mautrix_whatsapp_exposure_path_prefix }}
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.middlewares=matrix-mautrix-whatsapp-exposure-strip-prefix
+
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.rule={{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_rule }}
+
+{% if matrix_mautrix_whatsapp_container_labels_exposure_traefik_priority | int > 0 %}
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.priority={{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_priority }}
+{% endif %}
+
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.service=matrix-mautrix-whatsapp-exposure
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.entrypoints={{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_entrypoints }}
+
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.tls={{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_tls | to_json }}
+{% if matrix_mautrix_whatsapp_container_labels_exposure_traefik_tls %}
+traefik.http.routers.matrix-mautrix-whatsapp-exposure.tls.certResolver={{ matrix_mautrix_whatsapp_container_labels_exposure_traefik_tls_certResolver }}
+{% endif %}
+
+############################################################
+#                                                          #
+# /Bridge API exposure                                     #
+#                                                          #
+############################################################
+{% endif %}
+
 
 {% endif %}