Add label if on current node

app/assets/stylesheets/pages/geo_nodes.scss

@@ -35,13 +35,20 @@
   margin-top: 5px;
 }
 
-.primary-node-badge {
+.node-badge {
   color: $white-light;
-  background-color: $blue-300;
   display: inline-block;
   margin-left: 5px;
   padding: 0 5px;
   border-radius: 3px;
+
+  &.primary-node {
+    background-color: $blue-300;
+  }
+
+  &.current-node {
+    background-color: $green-400;
+  }
 }
 
 .node-actions {

app/views/admin/geo_nodes/index.html.haml

@@ -21,7 +21,9 @@
             = node_status_icon(node)
             %strong= node.url
             - if node.primary?
-              .primary-node-badge Primary
+              .node-badge.primary-node Primary
+            - if Gitlab::Geo.current_node == node
+              .node-badge.current-node Current node
               %span.help-block Primary node
             - else
               .js-geo-node-status{ style: 'display: none' }