Intentionally start Coturn after the homeserver when devture_systemd_service_manager_service_restart_mode is 'one-by-one'

group_vars/matrix_servers

@@ -224,6 +224,12 @@ matrix_homeserver_sliding_sync_url: "{{ matrix_sliding_sync_base_url if matrix_s
 #     (see `matrix_playbook_internal_matrix_client_api_traefik_entrypoint_enabled`)
 # - core services (the homeserver) get a level of ~1000
 # - services that the homeserver depends on (database, Redis, ntfy, Coturn, etc.) get a lower level - between 500 and 1000
+# - Coturn gets a higher level if `devture_systemd_service_manager_service_restart_mode == 'one-by-one'` to intentionally delay it, because:
+#  - starting services one by one means that the service manager role waits for each service to fully start before proceeding to the next one
+#  - if Coturn has a lower priority than the homeserver, it would be started before it
+#  - since Coturn is started before the homeserver, there's no container label telling Traefik to get a `matrix.DOMAIN` certificate
+#  - thus, Coturn would spin and wait for a certificate until it fails. We'd get a playbook failure due to it, but service manager will proceed to start all other services anyway.
+#  - only later, when the homeserver actually starts, would that certificate be fetched and dumped
 # - reverse-proxying services get level 3000
 # - Matrix utility services (bridges, bots) get a level of 2000/2200, so that:
 #   - they can start before the reverse-proxy
@@ -330,7 +336,7 @@ devture_systemd_service_manager_services_list_auto: |
     +
     ([{'name': 'matrix-corporal.service', 'priority': 1500, 'groups': ['matrix', 'corporal']}] if matrix_corporal_enabled else [])
     +
-    ([{'name': 'matrix-coturn.service', 'priority': 900, 'groups': ['matrix', 'coturn']}] if matrix_coturn_enabled else [])
+    ([{'name': 'matrix-coturn.service', 'priority': (900 if devture_systemd_service_manager_service_restart_mode == 'clean-stop-start' else 1500), 'groups': ['matrix', 'coturn']}] if matrix_coturn_enabled else [])
     +
     ([{'name': 'matrix-rageshake.service', 'priority': 4000, 'groups': ['matrix', 'rageshake']}] if matrix_rageshake_enabled else [])
     +