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Chapter 7

Administering the Cluster

This chapter provides the procedures for administering items that affect the entire cluster.

This is a list of the procedures in this chapter.

Administering the Cluster Overview

Table 7-1 Task List: Administering the Cluster

Task	For Instructions, Go To
Change the name of the cluster	How to Change the Cluster Name
List node IDs and their corresponding node names	How to Map Node ID to Node Name
Permit or deny new nodes to add themselves to the cluster	How to Work With New Cluster Node Authentication
Change the time for a cluster using the Network Time Protocol (NTP)	How to Reset the Time of Day in a Cluster
Bring down a node to the OpenBoot PROM `ok` prompt on a SPARC based system or to a Boot Subsystem on an x86 based system	SPARC: How to Enter the OpenBoot PROM (OBP) on a Node
Change the private hostname	How to Change the Private Hostname
Put a cluster node in maintenance state	How to Put a Node Into Maintenance State
Bring a cluster node out of maintenance state	How to Bring a Node Out of Maintenance State
Add a node to a cluster	How to Add a Node to the Authorized Node List
Remove a node from a cluster	How to Remove a Node From the Cluster Software Configuration

How to Change the Cluster Name

If necessary, you can change the cluster name after initial installation.

Become superuser on any node in the cluster.

Type the scsetup command.
# scsetup
The Main Menu is displayed.

To change the cluster name, type 7 (Other cluster properties).
The Other Cluster Properties menu is displayed.

Make your selection from the menu and follow the onscreen instructions.

Example--Changing the Cluster Name

The following example shows the scconf(1M) command generated from the scsetup(1M) utility to change to the new cluster name, dromedary.

# scconf -c -C cluster=dromedary

How to Map Node ID to Node Name

During Sun Cluster installation, each node is automatically assigned a unique node ID number. The node ID number is assigned to a node in the order in which it joins the cluster for the first time; once assigned, the number cannot be changed. The node ID number is often used in error messages to identify which cluster node the message concerns. Use this procedure to determine the mapping between node IDs and node names.

You do not need to be superuser to list configuration information.

Use the scconf(1M) command to list the cluster configuration information.
% scconf -pv | grep "Node ID"

Example--Mapping the Node ID to the Node Name

The following example shows the node ID assignments

% scconf -pv | grep "Node ID"
(phys-schost-1) Node ID:                    1
(phys-schost-2) Node ID:                    2
(phys-schost-3) Node ID:                    3

How to Work With New Cluster Node Authentication

Sun Cluster enables you to determine if new nodes can add themselves to the cluster and with what type of authentication. You can permit any new node to join the cluster over the public network, deny new nodes from joining the cluster, or indicate a specific node that can join the cluster. New nodes can be authenticated by using either standard UNIX or Diffie-Hellman (DES) authentication. If you select DES authentication, you must also configure all necessary encryption keys before a node can join. See the keyserv(1M) and publickey(4) man pages for more information.

Become superuser on any node in the cluster.

Enter the scsetup(1M) utility.
# scsetup
The Main Menu is displayed.

To work with cluster authentication, type 6 (New nodes).
The New Nodes menu is displayed.

Make your selection from the menu and follow the onscreen instructions.

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