update nginx conf for loadb

salt/manager/files/nginx-default-site.conf

@@ -37,6 +37,31 @@ server {
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
     }
+
+    # Load balancer support 
+    location /RBstat {
+        set $time -8d;
+        if ($query_string ~* "time=(.*)") {
+           set $time $1;
+        }
+        set $target_param sum(circle.*.vmcount);
+        if ($query_string ~* "target=(.*)") {
+           set $target_param $1;
+        }
+        set $format_param png;
+        if ($query_string ~* "format=(.*)") {
+           set $format_param $1;
+        }
+        set $title_param $target_param;
+        if ($query_string ~* "title=(.*)") {
+           set $title_param $1;
+        }
+        set $until_param 0;
+        if ($query_string ~* "until=(.*)") {
+           set $until_param $1;
+        }
+        proxy_pass http://127.0.0.1:8081/render?format=$format_param&target=$target_param&from=$time&height=800&width=1400&hideLegend=false&areaMode=all&target=constantLine(0)&title=$title_param;
+    }
 }
 
 {% if pillar['deployment_type'] == "local" %}