ansible-inventories/gentner#2471 Update Varnish configuration

templates/default.vcl

@@ -124,6 +124,16 @@ sub vcl_recv {
     return (pass);
   }
 
+  # Health Check
+  if (req.url == "/varnishcheck") {
+    return(synth(751, "OK!"));
+    if (std.healthy(req.backend_hint)) {
+      return(synth(751, "OK!"));
+    } else {
+      return(synth(752, "FAILED!"));
+    }
+  }
+
   # Some generic URL manipulation, useful for all templates that follow
   # First remove the Google Analytics added parameters, useless for our backend
   if (req.url ~ "(\?|&)(utm_source|utm_medium|utm_campaign|utm_content|gclid|cx|ie|cof|siteurl)=") {