Final commit

* Implemented PM reviews from PR 3846

* Corrected title

* Added line 60

* Added missing double quotes in line 136

* minor edit

Author: rao-shwe

modules/rest-api/pages/rest-set-up-services-existing-nodes.adoc

@@ -1,4 +1,4 @@
-= Assigning Services on an Existing Node
+= Assigning Services to an Existing Node
 
 :description: pass:q[Use the REST API to assign or remove services on an existing node in a cluster, and rebalance the cluster.]
 :page-topic-type: reference
@@ -56,11 +56,11 @@ Where,
 
 ** `<list of nodes>` indicate the nodes on which the `<service>` must reside in after the rebalance operation is complete.
 The node names are separated by commas.
-+
-If a `<service>` is running on any node in the cluster that's not in this list, Couchbase Server removes that `<service>` during the rebalance operation.
-For more information, see xref:rest-api:rest-cluster-rebalance.adoc[Rebalancing the Cluster].
 
-** For example, `-d topology[<service>]=otp_node1,otp_node2`.
+** For example, `-d topology[<service>]="otp_node1,otp_node2"`.
+
+** To remove or exclude one of the above listed services from the cluster, do not list any nodes for that service.
+For example, `-d topology[<service>]=""`.
 
 NOTE: The rebalance occurs even if no `<service>` is changed.
 
@@ -121,8 +121,9 @@ You could reconfigure the services on the existing nodes to match the following:
 * 172.23.108.72 – Search, Query
 * 172.23.108.73 – Analytics
 
-Because the Backup service is not in the topology list, it will be removed from the cluster.
-After the topology change and rebalance, two nodes (172.23.108.71 and 172.23.108.72) that previously had no services using the index disk storage path will now have services using it.
+After the topology change and rebalance, 2 nodes (172.23.108.71 and 172.23.108.72) that did not have any services using the index disk storage path will now have services using it.
+
+Also, using the following command, you remove the Backup Service from the cluster by not listing any nodes in `-d topology[backup]=`.
 
 To reconfigure the 5 nodes to the new topology, run the following command:
 
@@ -132,6 +133,7 @@ curl -u Administrator:password -X POST 172.23.108.69:8091/controller/rebalance \
 -d "topology[index][email protected],[email protected]"  \
 -d "topology[fts][email protected]"  \
 -d "topology[n1ql][email protected],[email protected],[email protected]" \
+-d "topology[backup]=""" \
 -d "topology[cbas][email protected]"
 ---- 
 
@@ -147,4 +149,4 @@ curl -u Administrator:password -X POST 172.23.108.69:8091/controller/rebalance \
 
 * For more information about assigning services to a new node, see xref:rest-api:rest-set-up-services.adoc[Assigning Services to a New Single Node].
 
-* For more information about rebalancing, see xref:rest-api:rest-cluster-rebalance.adoc[Rebalancing the Cluster].
+* For more information about rebalancing, see xref:rest-api:rest-cluster-rebalance.adoc[Rebalancing the Cluster].