two robustas (#2074)

Author: Avi-Robusta

docs/setup-robusta/installation-faq.rst

@@ -29,3 +29,16 @@ Verify success by checking that Robusta pods are running:
    :name: cb-get-pods-robusta-logs-custom
 
     kubectl get pods -n robusta
+
+Can I run two Robusta instances in the same cluster?
+======================================================
+
+Yes. Install each instance with a different Helm release name in its own namespace:
+
+.. code-block:: bash
+   :name: cb-helm-install-robusta-two-instances
+
+    helm install robusta robusta/robusta -f ./generated_values.yaml -n namespace-1 --create-namespace --set clusterName=<YOUR_CLUSTER_NAME>
+    helm install robusta-2 robusta/robusta -f ./generated_values.yaml -n namespace-2 --create-namespace --set clusterName=<YOUR_OTHER_CLUSTER_NAME>
+
+Use a unique ``clusterName`` for each instance so they appear separately in the Robusta UI.