HP 3PAR Cluster Extension Software Administrator Guide (5697-2047, June 2012)

10. Set the operation defaults to control failover behavior. To specify that when a resource fails,
the resources attempts to restart on the same node or another node in the cluster, use the
following settings:
ValueName
nothingrequires
restarton-fail
30timeout
11. Set the migration-threshold value. This value defines the number of failures that can occur on
a node before the node becomes ineligible to host the resource and the resource fails over to
another node. Set this value to 1 for HP 3PAR Cluster Extension.
12. Disable automatic failback by using resource constraints and setting resource-stickiness to the
lowest value compared with the other resource location constraints.
Testing the configuration
The procedure and commands in this section are based the sample configuration in “HP 3PAR
Cluster Extension for Linux: Sample configuration” (page 46). Use this procedure as a guide for
configuring your environment.
Test the configuration by migrating the resource group to the remote data center nodes:
1. Verify that the Remote Copy volume group is in destination mode on the remote storage system.
2. In the SLE HA GUI, click Management in the left pane. Right-click the HP 3PAR Cluster Extension
resource and select Start.
This will bring the resource group online on one of the cluster hosts, based the configured
resource constraints.
3. To migrate the resource, click Management in the left pane. Right-click the HP 3PAR Cluster
Extension resource, and then select Migrate Resource. Select a target node in the remote data
center in the Migrate Resource dialog box, and then click OK.
4. Verify that the Remote Copy volume group is in source mode on the remote storage system
after a successful migration in Step 3.
For more information, see HP 3PAR Remote Copy User Guide.
5. Migrate the resource to a node in the same data center and verify that the Remote Copy
volume group has not changed the volume group mode.
Managing HP 3PAR Cluster Extension services (SLE HA)
To manage a HP 3PAR Cluster Extension resource:
1. Click Management in the left pane of the Linux HA Management Client.
2. Right-click the HP 3PAR Cluster Extension resource and select Start or Stop to automatically
initiate the requested operation on the each resource in the dependency tree. For more
information, see the SLE HA documentation.
Configuring HP 3PAR Cluster Extension with HP Serviceguard on Linux
HP 3PAR Cluster Extension Software is integrated with the HP Serviceguard cluster software on
Linux using the customization scheme provided by Serviceguard. HP 3PAR Cluster Extension
provides a package control script (clxsg.sh) that allows you to manage HP 3PAR Cluster Extension
packages.
The executable clx3PARlxcs is called by HP 3PAR Cluster Extension before volume group
activation. This checks the status of a Remote Copy volume group associated with a volume group
configured for use with Serviceguard package. If necessary, HP 3PAR Cluster Extension takes
58 Configuring HP 3PAR Cluster Extension for Linux