Managing HP Serviceguard A.11.20.10 for Linux, December 2012

NOTE: fdisk may not be available for SUSE on all platforms. In this case, using YAST2 to set
up the partitions is acceptable.
Support for Lock LUN Devices
The following table describes the support for lock LUN devices on udev and device mapper:
This is supported, but the same udev rules must be used across all nodes in the
cluster for the whole LUN or the partitioned LUN.
If udev device is selected as lock
LUN.
This is not supported on a whole LUN or a partitioned LUN.If /dev/disk/by-id, /dev/
disk/by-path, and /dev/disk/
by-uuid device is selected as lock
LUN.
This is not supported on a whole LUN or a partitioned LUN.If /dev/dm-xx is selected as lock
LUN.
This is not supported on a whole LUN or a partitioned LUN.If /dev/mpath/mpathX is selected
as lock LUN.
This is supported on a whole LUN and a partitioned LUN.If /dev/mapper/mpathX
(user-friendly names) is selected as
lock LUN.
This is supported on a whole LUN and a partitioned LUN.If /dev/mapper/xxx(aliases) is
selected as lock LUN.
5.1.11 Setting Up and Running the Quorum Server
If you will be using a quorum server rather than a lock LUN, the Quorum Server software must be
installed on a system other than the nodes on which your cluster will be running, and must be
running during cluster configuration.
For detailed discussion, recommendations, and instructions for installing, updating, configuring,
and running the Quorum Server, see the HP Serviceguard Quorum Server Version A.04.00 Release
Notes at http://www.hp.com/go/hpux-serviceguard-docs (Select HP Serviceguard Quorum Server
Software). See also the discussion of the QS_HOST and QS_ADDR parameters under “Cluster
Configuration Parameters ” (page 86).
5.1.12 Creating the Logical Volume Infrastructure
Serviceguard makes use of shared disk storage. This is set up to provide high availability by using
redundant data storage and redundant paths to the shared devices. Storage for a Serviceguard
package is logically composed of LVM Volume Groups that are activated on a node as part of
starting a package on that node. Storage is generally configured on logical units (LUNs).
Disk storage for Serviceguard packages is built on shared disks that are cabled to multiple cluster
nodes. These are separate from the private Linux root disks, which include the boot partition and
root file systems. To provide space for application data on shared disks, create disk partitions
using the fdisk, and build logical volumes with LVM.
You can build a cluster (next section) before or after defining volume groups for shared data
storage. If you create the cluster first, information about storage can be added to the cluster and
package configuration files after the volume groups are created.
See “Volume Managers for Data Storage” (page 68) for an overview of volume management in
HP Serviceguard for Linux. The sections that follow explain how to do the following tasks:
• Displaying Disk Information (page 140)
• Creating Partitions (page 140)
• Enabling Volume Group Activation Protection (page 142)
5.1 Preparing Your Systems 139