Installation guide

fence device, disable ACPI Soft-Off for that node. Otherwise, if ACPI Soft-Off is enabled, an
integrated fence device can take four or 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 power 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.
# chkconfig acpid off
5.1.3 Firewall
If use of a local firewall on the cluster nodes is intended, the specific IP ports for the following
services must be enabled in order to accommodate RHCS communication requirements:
Service IP Ports
openais 5404, 5405
rgmanager 41966, 41967, 41968, 41969
ricci 11111
dlm 21064
ccsd 50006, 50007, 50008, 50009
5.2 Network Configuration
In a cluster configuration, the configuration of the cluster interconnect is extremely important.
The interconnect is responsible for all internal cluster communication. With a clustered file
system, all distributed locking messages are routed through the cluster interconnect. As such,
it is highly recommended that the network be reliable and high speed.
5.2.1 Public/Private Networks
At least two network interfaces are recommended for clustering. The reason for this is to
separate cluster traffic from all other network traffic. Availability and cluster file system
performance is dependent on the reliability and performance of the cluster communication
network (private network).
Therefore, all public network load must be routed through a different network (public network).
5.2.2 Bonding
In high availability configurations, at least the private or cluster interconnect network setup,
preferably both, must be fully redundant. Network Interface Card (NIC) bonding is the only
method to provide NIC failover for the cluster communication network.
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