Configuring a DNS server

The cluster requires DNS for circulating load distribution across the physical nodes in the cluster.

The cluster has a single hostname, for example: ibm.customer.com. Each node in the cluster hosts identical cluster-wide services and each node has a Virtual IP address (VIP). DNS responds to a DNS request for the cluster hostname with one VIP out of the list of VIPs. With each DNS response, the sequence of the VIP addresses in the list changes to ensure load distribution.

For the following procedures, you need the cluster hostname and VIP addresses, which you specified in the worksheet, to create a DNS A record for each VIP in the cluster.