HP Serviceguard Extension for RAC (SGeRAC) manual Checking Cluster Components

NOTE:

•All of the checks below are performed when you run cmcheckconf without any arguments (or with only -v, with or without -kor -K). cmcheckconf validates the current cluster and package configuration, including external scripts and pre-scripts for modular packages, and runs cmcompare to check file consistency across nodes. (This new version of the command also performs all of the checks that were done in previous releases.) See “Checking Cluster Components” (page 123) for details.

You may want to set up a cron (1m) job to run cmcheckconf regularly. See “Setting up Periodic Cluster Verification” (page 125).

•These new checks are not done for legacy packages. For information about legacy and modular packages.

•LVM volume groups:

◦Check that each volume group contains the same physical volumes on each node.

◦Check that each node has a working physical connection to the physical volumes.

◦Check that volume groups used in modular packages are cluster-aware.

•LVM logical volumes

◦Check that file systems have been built on the logical volumes identified by the fs_name parameter in the cluster's packages.

•File consistency:

◦Check that files including the following are consistent across all nodes.

–/etc/hosts (must contain all IP addresses configured into the cluster)

–/etc/nsswitch.conf

–/etc/services

–package control scripts for legacy packages (if you specify them)

–/etc/cmcluster/cmclfiles2check

–/etc/cmcluster/cmignoretypes.conf

–/etc/cmcluster/cmknowncmds

–/etc/cmcluster/cmnotdisk.conf

–user-created files (if you specify them)

Checking Cluster Components

The following table shows each component that you can check, the command or tool to use, and where to find further information.

NOTE: The table includes all the checks available as of A.11.20, not just the new ones.

Table 5 Verifying Cluster Components

Component (Context)	Tool or Command; More Information	Comments
Volume groups (cluster)	cmcheckconf (1m), cmapplyconf	Checked for the following:
	(1m)	•	Existence
		•	Availability on each node

Checking the Cluster Configuration and Components 123