Proxy additional JVBs through traefik (fixes #2721)

Traefik wasn't proxying /colibri-ws/jvb-X/ to additional jvbs. This
fixes it.

This contribution is provided by GRNET S.A. (grnet.gr).

group_vars/matrix_servers

@@ -2555,6 +2555,38 @@ jitsi_self_check_validate_certificates: "{{ false if matrix_ssl_retrieval_method
 # when embedding Jitsi in Matrix rooms.
 jitsi_disable_gravatar: true
 
+# Traefik proxying for additional JVBs. These can't be configured using Docker
+# labels, like the first JVB is, because they run on different hosts, so we add
+# the necessary configuration to the file provider.
+devture_traefik_provider_configuration_extension_yaml: |
+  http:
+   routers:
+     {% for host in groups['jitsi_jvb_servers'] %}
+
+     additional-{{ hostvars[host]['jitsi_jvb_server_id'] }}-router:
+       entryPoints:
+         - "{{ devture_traefik_entrypoint_primary }}"
+       rule: "Host(`{{ jitsi_hostname }}`) && PathPrefix(`/colibri-ws/{{ hostvars[host]['jitsi_jvb_server_id'] }}/`)"
+       service: additional-{{ hostvars[host]['jitsi_jvb_server_id'] }}-service
+       {% if devture_traefik_entrypoint_primary != 'web' %}
+
+       tls:
+         certResolver: "{{ devture_traefik_certResolver_primary }}"
+
+       {% endif %}
+
+     {% endfor %}
+
+   services:
+     {% for host in groups['jitsi_jvb_servers'] %}
+
+     additional-{{ hostvars[host]['jitsi_jvb_server_id'] }}-service:
+       loadBalancer:
+         servers:
+           - url: "http://{{ host }}:9090/"
+
+     {% endfor %}
+
 ######################################################################
 #
 # /jitsi