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 | |
List node IDs and their corresponding node names | |
Permit or deny new nodes to add themselves to the cluster | |
Change the time for a cluster using the Network Time Protocol (NTP) | |
Bring down a node and enter the OpenBoot™ PROM | |
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 | |
Add a node to a cluster | |
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.
Enter the scsetup(1M) utility.
# 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.