feat(docker-dev): Traefik routes only the central cluster UI

docker-dev/traefik-dynamic.yml

@@ -1,12 +1,10 @@
-# docker-dev companion to scripts/install/traefik-dynamic.yml. Routes three
-# Akka clusters that share the Compose network:
+# docker-dev companion to scripts/install/traefik-dynamic.yml. Routes the single
+# central cluster UI on the shared Compose network:
 #
-#   - Main cluster (default): PathPrefix(`/`) → admin-a / admin-b.
-#   - Site A cluster:         Host(`site-a.localhost`) → site-a-1 / site-a-2.
-#   - Site B cluster:         Host(`site-b.localhost`) → site-b-1 / site-b-2.
+#   - Central UI (only route): PathPrefix(`/`) → central-1 / central-2.
 #
-# Host-header rules are more specific than PathPrefix, so they win over the
-# default router for the site hostnames automatically — no priority field needed.
+# The driver-only site nodes serve no UI, so they have no Traefik route — the
+# central cluster manages and deploys to them over the shared Akka mesh.
 
 http:
   routers:
@@ -15,16 +13,6 @@ http:
       rule: "PathPrefix(`/`)"
       service: otopcua-admin
 
-    otopcua-site-a:
-      entryPoints: ["web"]
-      rule: "Host(`site-a.localhost`)"
-      service: otopcua-site-a
-
-    otopcua-site-b:
-      entryPoints: ["web"]
-      rule: "Host(`site-b.localhost`)"
-      service: otopcua-site-b
-
   services:
     otopcua-admin:
       loadBalancer:
@@ -37,44 +25,8 @@ http:
             httpOnly: true
             sameSite: lax
         servers:
-          - url: "http://admin-a:9000"
-          - url: "http://admin-b:9000"
-        healthCheck:
-          path: /health/active
-          interval: 5s
-          timeout: 2s
-
-    otopcua-site-a:
-      loadBalancer:
-        # Blazor Server uses SignalR; the WebSocket upgrade must hit the same
-        # backend that owns the circuit ID. Sticky cookie keeps each session
-        # pinned to one node so the post-handshake WebSocket doesn't 404.
-        sticky:
-          cookie:
-            name: otopcua_lb
-            httpOnly: true
-            sameSite: lax
-        servers:
-          - url: "http://site-a-1:9000"
-          - url: "http://site-a-2:9000"
-        healthCheck:
-          path: /health/active
-          interval: 5s
-          timeout: 2s
-
-    otopcua-site-b:
-      loadBalancer:
-        # Blazor Server uses SignalR; the WebSocket upgrade must hit the same
-        # backend that owns the circuit ID. Sticky cookie keeps each session
-        # pinned to one node so the post-handshake WebSocket doesn't 404.
-        sticky:
-          cookie:
-            name: otopcua_lb
-            httpOnly: true
-            sameSite: lax
-        servers:
-          - url: "http://site-b-1:9000"
-          - url: "http://site-b-2:9000"
+          - url: "http://central-1:9000"
+          - url: "http://central-2:9000"
         healthCheck:
           path: /health/active
           interval: 5s