6.2.2 How to Remove a Node From the Cluster Software Configuration

This is the last software configuration procedure that needs to be accomplished in the process for removing a node from a cluster. You must be superuser on a node in the cluster to perform this procedure.

1. Be sure you have correctly completed all prerequisite tasks listed in the task map for "6.2 Adding and Removing a Cluster Node".

   ---

   Note -

   Be sure you have placed the node in maintenance state and removed it from all resource groups, device groups, and quorum device configurations before continuing with this procedure.

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2. Determine the local disks in the cluster and their associated raw disk device group names, for example dsk/d4.

   # scconf -pvv | grep Local_Disk

3. Identify which local disks and raw disk device groups in the cluster are connected to the node being removed.

   # scconf -pvv | grep node-name | grep Device

4. Disable the localonly property for each local disk identified in Step 3.

   See the scconf_dg_rawdisk(1M) man page for more information about the localonly property.

   # scconf -c -D name=rawdisk-device-group,localonly=false

5. Remove the node from all raw disk device groups, of which the node is a member.

   This step must be completed for each raw disk device group that is connected to the node being removed.

   # scconf -r -D name=rawdisk-device-group,nodelist=node

6. Remove the node from the cluster.

   # scconf -r -h node=node

7. Verify the node removal using scstat.

   # scstat -n

8. To physically remove the node from the cluster, remove the hardware connections as described in the Sun Cluster 3.0 U1 Hardware Guide.

After the device has been removed from the cluster, you must reinstall the Solaris operating environment on the removed host before it can be placed back into service in any capacity.

6.2.2.1 Example--Removing a Node From the Cluster Software Configuration

This example shows how to remove a node (phys-schost-2) from a cluster.

[Become superuser on any node.]
[Identify all local disks and their raw disk device group names:]
# scconf -pvv | grep Local_Disk
	(dsk/d4) Device group type:          Local_Disk
	(dsk/d8) Device group type:          Local_Disk
[Identify the local disks and raw disk device groups connected to the node being removed:]
# scconf -pvv | grep phys-schost-2 | grep Device	
	(dsk/d4) Device group node list:  phys-schost-2
	(dsk/d2) Device group node list:  phys-schost-1, phys-schost-2
	(dsk/d1) Device group node list:  phys-schost-1, phys-schost-2
[Remove the localonly flag for each local disk on the node:]
# scconf -c -D name=dsk/d4,localonly=false
[Remove the node from all raw disk device groups:]
# scconf -r -D name=dsk/d4,nodelist=phys-schost-2
# scconf -r -D name=dsk/d2,nodelist=phys-schost-2
# scconf -r -D name=dsk/d1,nodelist=phys-schost-2
[Remove the node from the cluster:]
# scconf -r -h node=phys-schost-2
[Verify node removal:]
# scstat -n
 
-- Cluster Nodes --
                    Node name           Status
                    ---------           ------
  Cluster node:     phys-schost-1       Online

6.2.2.2 Where to Go From Here

For hardware procedures, see the Sun Cluster 3.0 U1 Hardware Guide.

For an overall list of tasks for removing a cluster node, see Table 6-3, "Task Map: Removing a Cluster Node."

To add a node to an existing cluster, see "6.2.1 How to Add a Cluster Node to the Authorized Node List".