Modifying the clusters File

The /etc/clusters file contains information about the known clusters in the local naming domain. This file, which maps a cluster name to the list of host names in the cluster, can be created as an NIS or NIS+ map, or locally in the /etc directory.

The /etc/clusters file requires updating only if:

• Any host names change

• More clusters are added to your Sun Cluster

For more information about NIS and NIS+ maps, refer to the NIS/NIS+ System Administration Guide. Refer to the Sun Cluster 2.2 Software Installation Guide for information about creating the /etc/clusters file. NIS/NIS+ files must be changed on the NIS/NIS+ server.

How to Modify the clusters File

1. Edit the /etc/clusters file to add the cluster name and physical host names of all nodes.

   For example, to create a cluster named hacluster that consists of node 0 phys-hahost1, node 1 phys-hahost2, node 2 phys-hahost3, and node 3 phys-hahost4, add this entry to the file:

   # Sun Enterprise Cluster nodes hacluster phys-hahost1 phys-hahost2 phys-hahost3 phys-hahost4

   The /etc/clusters files must be identical on all nodes. Make the same modifications on all nodes.

How to Create the clusters Table

1. In an NIS+ environment, you must create a clusters table. The entries in this table are the same as the entries in the /etc/clusters file.

   For example, to create a clusters table in a domain named mydomain in an NIS+ environment, use the following command:

   # nistbladm -c key-value key=SI value= clusters.mydomain.

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   Note -

   The trailing period (.) at the end of the nistbladm command is required.

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