Add external monitoring network

coreos-config/plays/services/prometheus/docker-compose.yaml

@@ -24,6 +24,7 @@ services:
     networks:
       - backend
       - alertmanager
+      - metrics
 
   prometheus-docker-sd:
     image: registry.tobiasmanske.de/prometheus-docker-sd:latest
@@ -136,7 +137,7 @@ services:
       - "^/(sys|proc|dev|host|etc|rootfs/var/lib/docker/containers|rootfs/var/lib/docker/overlay2|rootfs/run/docker/netns|rootfs/var/lib/docker/aufs)($$|/)"
       - '--collector.systemd'
     networks:
-      - backend
+      - metrics
     restart: unless-stopped
 
   cadvisor:
@@ -154,7 +155,7 @@ services:
       - /sys:/sys:ro
       - /var/lib/docker/:/var/lib/docker:ro
     networks:
-      - backend
+      - metrics
     restart: unless-stopped
 
   loki:
@@ -186,6 +187,7 @@ services:
       - "prometheus-scrape.port=8080"
     networks:
       - backend
+      - metrics
 
   mimir:
     image: grafana/mimir:latest
@@ -202,6 +204,7 @@ services:
       - "prometheus-scrape.port=8080"
     networks:
       - backend
+      - metrics
 
 volumes:
   prom_data:
@@ -216,3 +219,5 @@ networks:
   backend:
     internal: true
   alertmanager:
+  metrics:
+    external: true