Managing Serviceguard 12th Edition, March 2006

Understanding Serviceguard Software Components
How the Package Manager Works
Chapter 384
the resource is available before starting the package. In addition, the
package manager can fail the package to another node or take other
action if the resource becomes unavailable after the package starts.
You can specify a registered resource for a package by selecting it from
the list of available resources displayed in the Serviceguard Manager
Configuring Packages. The size of the list displayed by Serviceguard
Manager depends on which resource monitors have been registered on
your system. Alternatively, you can obtain information about registered
resources on your system by using the command
/opt/resmon/bin/resls. For additional information, refer to the man
page for resls(1m).
Using the EMS HA Monitors
The EMS (Event Monitoring Service) HA Monitors, available as a
separate product (B5736DA), can be used to set up monitoring of disks
and other resources as package dependencies. Examples of resource
attributes that can be monitored using EMS include the following:
•Logical volume status
• Physical volume status
•System load
• Number of users
• File system utilization
•LAN health
Once a monitor is configured as a package dependency, the monitor will
notify the package manager if an event occurs showing that a resource is
down. The package may then be failed over to an adoptive node.
The EMS HA Monitors can also be used to report monitored events to a
target application such as OpenView IT/Operations for graphical display
or for operator notification. Refer to the manual Using High Availability
Monitors (B5736-90022) for additional information.