Red Hat CLUSTER MANAGER - INSTALLATION AND Administration Manual page 34

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• Use the cat /proc/devices command to display the devices configured in the kernel.
See Section 2.3.5, Displaying Devices Configured in the Kernel for more information about
performing this task.
8. Verify that the cluster systems can communicate over all the network interfaces by using the ping
command to send test packets from one system to the other.
9. If intending to configure Samba services, verify that the Samba related RPM packages are installed
on your system.
2.3.1 Kernel Requirements
When manually configuring the kernel, adhere to the following are kernel requirements:
• Enable IP Aliasing support in the kernel by setting the CONFIG_IP_ALIAS kernel option to y.
When specifying kernel options, under Networking Options, select IP aliasing sup-
port.
• Enable support for the /proc file system by setting the CONFIG_PROC_FS kernel option to y.
When specifying kernel options, under Filesystems, select /proc filesystem sup-
port.
• Ensure that the SCSI driver is started before the cluster software. For example, edit the startup
scripts so that the driver is started before the cluster script. It is also possible to statically build
the SCSI driver into the kernel, instead of including it as a loadable module, by modifying the
/etc/modules.conf file.
In addition, when installing the Linux distribution, it is strongly recommended to do the following:
• Gather the IP addresses for the cluster systems and for the point-to-point Ethernet heartbeat in-
terfaces, before installing a Linux distribution. Note that the IP addresses for the point-to-point
Ethernet interfaces can be private IP addresses, (for example, 10.x.x.x).
• Optionally, reserve an IP address to be used as the "cluster alias". This address is typically used
to facilitate remote monitoring.
• Enable the following Linux kernel options to provide detailed information about the system con-
figuration and events and help you diagnose problems:
– Enable SCSI logging support by setting the CONFIG_SCSI_LOGGING kernel option to y.
When specifying kernel options, under SCSI Support, select SCSI logging facil-
ity.
– Enable support for sysctl by setting the CONFIG_SYSCTL kernel option to y. When spec-
ifying kernel options, under General Setup, select Sysctl support.
Chapter 2:Hardware Installation and Operating System Configuration