Managing Serviceguard Eighteenth Edition, September 2010

NOTE: Cluster configuration is described under “Configuring the Cluster ” (page 242).
Check the heartbeat configuration. CVM 4.1 and later versions require that the cluster
have either multiple heartbeats or a single heartbeat with a standby, and do not allow
the use of Auto Port Aggregation, Infiniband, or VLAN interfaces as a heartbeat subnet.
The CVM cluster volumes are managed by a Serviceguard-supplied system multi-node
package which runs on all nodes at once, and cannot fail over. For CVM 4.1 and later,
Serviceguard creates the SG-CFS-pkg.
The SG-CFS-pkg package has the following responsibilities:
• Maintain Veritas configuration files /etc/llttab, /etc/llthosts, /etc/
gabtab
• Launch required services: cmvxd, cmvxpingd, vxfsckd
• Start/halt Veritas process in the proper order: llt, gab, vxfen, odm, cvm, cfs
Use the cmapplyconf command to create the system multi-node package that
communicates cluster information to CVM:
cmapplyconf -P /etc/cmcluster/cfs/SG-CFS-pkg.conf
Begin package verification ...
Modify the package configuration ([y]/n)? Y
Completed the cluster update
IMPORTANT: Do this only if you are using CVM without CFS. If you are using CFS,
you set up CVM as part of CFS; see “Creating a Storage Infrastructure with Veritas
Cluster File System (CFS)” (page 261).
Identifying the Master Node
If it is not already running, start the cluster. This will automatically activate the special
CVM package:
cmruncl
When CVM starts up, it selects a master node, and this is the node from which you
must issue the disk group configuration commands. To determine the master node,
issue the following command from each node in the cluster:
vxdctl -c mode
One node will identify itself as the master. Create disk groups from this node.
Initializing Disks for CVM
You need to initialize the physical disks that will be employed in CVM disk groups. If
a physical disk has been previously used with LVM, you should use the pvremove
command to delete the LVM header data from all the disks in the volume group (this
is not necessary if you have not previously used the disk with LVM).
270 Building an HA Cluster Configuration