Administrator's Guide

Configuring HyperFabric
Configuring HyperFabric with ServiceGuard
Chapter 4 87
Configuring HyperFabric with ServiceGuard
HyperFabric supports the ServiceGuard HA product.
NOTE If you plan to configure HyperFabric with ServiceGuard, please read this
section. Otherwise, skip this section and go on to the next section,
“Configuring HMP for Transparent Local Failover Support” on page 96.
ServiceGuard lets you create HA clusters of HP 9000 server systems.
Within the cluster, ServiceGuard allows you to group your application
services (individual HP-UX processes) into packages. In the event of a
single service, node, network, or other resource failure, ServiceGuard can
transfer control of the package to another node in the cluster, allowing
services to remain available with minimal interruption.
ServiceGuard directly monitors cluster nodes, LAN interfaces, and
services, which are the individual processes within an application. In
addition, specialized monitors might be supplied by the developers of
other components. The HyperFabric monitor is supplied with the
HyperFabric product and is installed with it. To use the HyperFabric
monitor with ServiceGuard, you configure the monitor as an
ServiceGuard package dependency.
Although HyperFabric can be used by an application within a package to
communicate with other nodes, it is not possible to use HyperFabric as a
heartbeat LAN. So, in a package control script, do not specify
HyperFabric IPs/subnets in the lines that contain the keywords IP[ n ]
and SUBNET[ n ]. Also, cmquerycl will not “discover” and report
HyperFabric IPs and subnets.
After you have configured HyperFabric as a package dependency,
ServiceGuard’s package manager calls the Event Monitoring Service
(EMS) to launch an external monitor for HyperFabric. The package will
not start unless the monitor reports that HyperFabric is available, and
the package will fail when HyperFabric’s status is DOWN (that is, when
all HyperFabric adapters on a node become non-functional).
Complete instructions for configuring ServiceGuard clusters and
packages are provided in the manual, “Managing MC/ServiceGuard”.