Configuring Acpi For Use With Integrated Fence Devices - Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.1 Configuration Manual

10.10.10.0/24 -d 10.10.10.0/24 --dports 50007 -j ACCEPT
Example 2.9. Port 50007: ccsd (UDP)
3. Configuring ACPI For Use with Integrated Fence
Devices
If your cluster uses integrated fence devices, you must configure ACPI (Advanced Configuration
and Power Interface) to ensure immediate and complete fencing.
Note
For the most current information about integrated fence devices supported by
Red Hat Cluster Suite, refer to
If a cluster node is configured to be fenced by an integrated fence device, disable ACPI Soft-Off
for that node. Disabling ACPI Soft-Off allows an integrated fence device to turn off a node
immediately and completely rather than attempting a clean shutdown (for example,
). Otherwise, if ACPI Soft-Off is enabled, an integrated fence device can take four or
-h now
more seconds to turn off a node (refer to note that follows). In addition, if ACPI Soft-Off is
enabled and a node panics or freezes during shutdown, an integrated fence device may not be
able to turn off the node. Under those circumstances, fencing is delayed or unsuccessful.
Consequently, when a node is fenced with an integrated fence device and ACPI Soft-Off is
enabled, a cluster recovers slowly or requires administrative intervention to recover.
Note
The amount of time required to fence a node depends on the integrated fence
device used. Some integrated fence devices perform the equivalent of pressing
and holding the power button; therefore, the fence device turns off the node in
four to five seconds. Other integrated fence devices perform the equivalent of
pressing the power button momentarily, relying on the operating system to turn
off the node; therefore, the fence device turns off the node in a time span much
longer than four to five seconds.
To disable ACPI Soft-Off, use
immediately when fenced. The preferred way to disable ACPI Soft-Off is with
management: however, if that method is not satisfactory for your cluster, you can disable ACPI
Soft-Off with one of the following alternate methods:
1
http://www.redhat.com/cluster_suite/hardware/
Configuring ACPI For Use with Integrated
http://www.redhat.com/cluster_suite/hardware/
management and verify that the node turns off
chkconfig
1
.
shutdown
chkconfig
17