diff --git a/grafana-dashboards/common.jsonnet b/grafana-dashboards/common.jsonnet
new file mode 100644
index 0000000000..18f6d14316
--- /dev/null
+++ b/grafana-dashboards/common.jsonnet
@@ -0,0 +1,17 @@
+local grafonnet = import 'github.com/grafana/grafonnet/gen/grafonnet-v11.1.0/main.libsonnet';
+local var = grafonnet.dashboard.variable;
+
+{
+  // grafonnet ref: https://grafana.github.io/grafonnet/API/dashboard/variable.html
+  variables: {
+    datasource:
+      var.datasource.new('datasource', 'yesoreyeram-infinity-datasource')
+      + var.datasource.generalOptions.showOnDashboard.withNothing()
+    ,
+    newhub:
+      var.query.new('hub')
+      + var.query.withDatasourceFromVariable(self.datasource)
+      + var.query.selectionOptions.withIncludeAll(value=true)
+    ,
+  },
+}