DOC-12926--8.0--Feedback-on-Nodes--Couchbase-Docs (#4092)

Author: RayOffiah

modules/learn/pages/clusters-and-availability/removal.adoc

@@ -14,7 +14,7 @@ However, removal should be used only when all nodes in the cluster are responsiv
 Removal essentially means using xref:learn:clusters-and-availability/rebalance.adoc[Rebalance] to redistribute data across a subset of pre-existing cluster-nodes.
 It can be performed with the UI, the CLI, or the REST API.
 When the CLI or REST API is used, a single command initiates a rebalance, specifying which nodes are to be excluded.
-When the UI is used, nodes to be removed are first identified, then rebalance is initiated.
+When the UI is used, nodes to be removed are first identified; then rebalance is initiated.
 When the rebalance is complete, the _cluster map_ is correspondingly updated and distributed to clients.
 The process occurs while the cluster continues to service requests for data.
 
@@ -74,7 +74,7 @@ As Table 1 shows, each of the four nodes takes a roughly equal share of the buck
 It also takes a roughly equal share of the replica bucket-items, kept in _replica_ vBuckets.
 Since the bucket has two replicas, the ratio of _active_ to _replica_ items, both on each node and in the total for the cluster, is approximately _1:2_.
 
-Table 2 shows the results on the cluster of the removal of node 4 and subsequent rebalance.
+Table 2 shows the results on the cluster when node 4 is removed and the cluster is rebalanced.
 
 .Three Surviving Data Service Nodes, One Bucket with 31,591 Items, Two Replicas
 [cols="2,3,3"]
@@ -147,9 +147,25 @@ Note that since multiple buckets may have been configured, and different replica
 
 For further examples of rebalance, in the context of _failover_, see xref:learn:clusters-and-availability/failover.adoc[Failover].
 
+=== Changing the IP address of a node
+
+If you are changing the IP address of a node:
+
+. Remove the node from the cluster.
+. Stop the server.
+. Change the IP address of the node.
+. Remove all the configuration files for the cluster affected by the IP change. The configuration files are located in `/opt/couchbase`. To delete the files, run the terminal command:
++
+[source, shell] 
+----
+rm -r /opt/couchbase
+----
++
+. Restart the server.
+
 [#removal-versus-graceful-failover]
 == Removal versus Graceful Failover
 
 As an alternative to removal, a responsive Data Service node can be taken out of a cluster by means of _Graceful Failover_.
-This may be faster, but the consequences do not maintain previous availability-levels.
+This may be faster, but the consequences do not maintain previous availability levels.
 An account of the advantages and disadvantages is provided in xref:learn:clusters-and-availability/graceful-failover.adoc#advantages-and-disadvantages[Graceful Failover].