grafana: add restart logic for varnish

grafana/grafana.sls

@@ -123,6 +123,26 @@ grafana-net-proxy:
       - file: docker-volume-grafana-provisioning
       - docker_network: grafana-net-proxy
 
+{%- if grafana.get('frontend', '') == 'traefik' %}
+docker_compose_restart_onchanges_varnish:
+  cmd.run:
+    - name: /usr/local/bin/docker-compose restart
+    - cwd: {{ compose }}
+    - onchanges:
+      - file: /etc/varnish/default.vcl
+    - require:
+      - file: /etc/varnish/default.vcl
+      - file: docker-volume-grafana-data
+      - file: docker-volume-grafana-provisioning
+      - docker_network: grafana-net-proxy
+{%- elif grafana.get('frontend', '') == 'nginx' %}
+restart-varnish:
+  service.running:
+    - name: varnish
+    - watch:
+      - file: /etc/varnish/default.vcl
+{%- endif %}
+
 docker_compose_up:
   cmd.run:
     - name: /usr/local/bin/docker-compose up -d