HP 3PAR Cluster Extension Software Administrator Guide (5697-1429, March 2012)

3 Configuring HP 3PAR Cluster Extension for Linux
HP 3PAR Cluster Extension supports integration with the following cluster software for Linux:
• “Configuring HP 3PAR Cluster Extension with RHCS” (page 47)
• “Configuring HP 3PAR Cluster Extension with SLE HA” (page 54)
NOTE: For a list of HP 3PAR Cluster Extension versions and the cluster software versions they
support, see the HP SPOCK website: http://www.hp.com/storage/spock.
HP HP 3PAR Cluster Extension for Linux: Sample configuration
Figure 7 (page 45) shows a sample configuration with RHCS or SLE HA and HP 3PAR Cluster
Extension.
Figure 7 Sample configuration
The configuration example in Figure 7 (page 45) assumes the following information about the
cluster:
• There are four nodes in the cluster: Host1, Host2, Host3, and Host4.
• The Remote Copy volume group clxwebdrg exists on the storage systems, and has virtual
volumes that are presented to all cluster nodes.
• HP 3PAR Cluster Extension may invoke the pre-executable script clxweb_pre_takeover.sh
and the post-executable script clxweb_post_takeover.sh. These files can be an executable
script or a program of your choice.
• For RHCS, the configuration file /etc/opt/hpclx3par/conf/CLX3PAR.config is
associated with the RHCS service CLXWEB that is configured to use the HP HP 3PAR Cluster
Extension resource agent script. RHCS invokes the resource agent script to start the CLXWEB
service. The CLXWEB service checks the Remote Copy volume group member states before
the LVM volume groups vgweb and vghtdocs are activated and the web server is started.
The HP 3PAR Remote Copy volume group clxwebdrg includes all virtual volumes for the
HP HP 3PAR Cluster Extension for Linux: Sample configuration 45