IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > High Availability Guide for Distributed Systems > Create clusters with Tivoli Monitoring components in an HACMP environment > Prepare for the base cluster
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
Check the cluster nodes environment
Before you install the base cluster, check the environment thoroughly:
- Ensure that the domain name system for all network interface cards resolves correctly.
- Ensure that all entries for host names (in the local host table /etc/hosts) are set in the same order on both computers. For example, if clusternode1 /etc/hosts contains:
10.0.0.1 host.domain.com hostThe /etc/hosts on clusternode2 should also contain
10.0.0.1 host.domain.com hostand not:
10.0.0.1 host host.domain.com
Ensure that the host tables have no double entries for the local host. Under SUSE SLES10, using 2 NICs, you might see the following two entries: localhost localhostIf you find a second entry, be sure to remove it. If there are double entries, Tivoli Monitoring installation fails.
Ensure that the domain name system works for the virtual IP address that will be used for the cluster. (The provided scripts assume that the virtual IP address is on the same subnet as the nodes’ IP addresses.)
Verify that the future virtual IP address is a valid address.
Ensure that this IP address is valid for the configured addresses on the public network interface cards of the cluster nodes (same range and subnet).
Verify, on both nodes, that the shared disk will not be mounted automatically during startup.
Parent topic:
Prepare for the base cluster