Managing HP Serviceguard for Linux, Tenth Edition, September 2012

5. To test that the file system /extra was created correctly and with high availability,
you can create a file on it, and read it.
echo "Test of LVM" >> /extra/LVM-test.conf
cat /extra/LVM-test.conf
NOTE: Be careful if you use YAST or YAST2 to configure volume groups, as that
may cause all volume groups on that system to be activated. After running YAST or
YAST2, check to make sure that volume groups for Serviceguard packages not
currently running have not been activated, and use LVM commands to deactivate
any that have. For example, use the command vgchange -a n /dev/sgvg00
to deactivate the volume group sgvg00.
Distributing the Shared Configuration to all Nodes
The goal in setting up a logical volume infrastructure is to build a set of volume groups
that can be activated on multiple nodes in the cluster. To do this, you need to build the
same LVM volume groups on any nodes that will be running the same package.
NOTE: The minor numbers used by the LVM volume groups must be the same on all
cluster nodes. They will if all the nodes have the same number of unshared volume groups.
To distribute the shared configuration, follow these steps:
1. Unmount and deactivate the volume group, and remove the tag if necessary. For
example, to deactivate only vgpkgA:
umount /extra
vgchange -a n vgpkgA
vgchange --deltag $(uname -n) vgpkgA
NOTE: Use vgchange --deltag only if you are implementing volume-group
activation protection. Remember that volume-group activation protection, if used,
must be implemented on each node.
2. To get the node ftsys10 to see the new disk partitioning that was done on ftsys9,
reboot:
reboot
The partition table on the rebooted node is then rebuilt using the information placed
on the disks when they were partitioned on the other node.
176 Building an HA Cluster Configuration