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Installing a Red Hat 4 Cluster

To install Red Hat Enterprise with Cluster Suite, take CDs or DVD and boot from it.

We are going to see step by step the interesting components.

Language

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Set the English language and not French to have more verbose output during future problems.

Keyboard

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Keep the French keyboard

Partitioning (do the same partitioning on all the cluster nodes)

Location Type Size LVM Name
/boot ext3 128 MB NO LVM!!!
LVM Group Full Size (space left) VolGroup00
/ ext3 4096 MB racine
/var ext3 4096 MB var
/usr ext3 10240 MB usr
/tmp ext3 2048 MB tmp
swap 4096 MB swap
/home ext3 Space left home

List of packages installation

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base
base-x
kde-desktop or gnome-desktop
editors (only vim)
mail-server (- spamassassin)
development-tools
compat-arch-development
admin-tools (+ sysstem-boot-config)
system-tools
compat-arch-support

After rebooting, install these packages from the cluster suite (cdrom/RedHat/RPMS). Warning: pay attention for SMP; if not SMP servers, do not install it, install other relative packages.

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ccs
cman
cman-kernel-smp
dlm
dlm-kernel-smp
fence
gulm
ipvsadm
magma
magma-plugins
perl-Net-Telnet
rgmanager
system-config-cluster

Or run this command directly:

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rpm -ivh --aid ccs-1.0.7-0.x86_64.rpm cman-1.0.11-0.x86_64.rpm cman-kernel-smp-2.6.9-45.2.x86_64.rpm  dlm-kernel-smp-2.6.9-42.10.x86_64.rpm fence-1.32.25-1.x86_64.rpm gulm-1.0.7-0.x86_64.rpm ipvsadm-1.24-6.x86_64.rpm magma-1.0.6-0.x86_64.rpm magma-plugins-1.0.9-0.x86_64.rpm perl-Net-Telnet-3.03-3.noarch.rpm rgmanager-1.9.53-0.x86_64.rpm system-config-cluster-1.0.27-1.0.noarch.rpm dlm-1.0.1-1.x86_64.rpm

A little update might not be so bad (optional):

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up2date -u

Modify the /etc/hosts like this on each node:

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127.0.0.1               localhost.localdomain localhost
192.168.0.242           secondary.cluster.net secondary
192.168.0.241           primary.cluster.net primary

Here is an example of the cluster.conf file in /etc/cluster:

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<?xml version="1.0"?>
<cluster config_version="13" name="alpha_cluster">
    <fence_daemon post_fail_delay="0" post_join_delay="3"/>
    <clusternodes>
        <clusternode name="primary.cluster.net" votes="1">
            <fence>
                <method name="1">
                    <device name="fence1" nodename="primary.cluster.net"/>
                </method>
            </fence>
        </clusternode>
        <clusternode name="secondary.cluster.net" votes="1">
            <fence>
                <method name="1">
                    <device name="fence2" nodename="secondary.cluster.net"/>
                </method>
            </fence>
        </clusternode>
    </clusternodes>
    <cman expected_votes="1" two_node="1"/>
    <fencedevices>
        <fencedevice agent="fence_manual" name="fence1"/>
        <fencedevice agent="fence_manual" name="fence2"/>
    </fencedevices>
    <rm>
        <failoverdomains>
            <failoverdomain name="myfailoverdomain" ordered="0" restricted="1">
                <failoverdomainnode name="primary.cluster.net" priority="1"/>
                <failoverdomainnode name="secondary.cluster.net" priority="1"/>
            </failoverdomain>
        </failoverdomains>
        <resources>
            <ip address="192.168.0.238" monitor_link="1"/>
            <fs device="/dev/sdb1" force_fsck="0" force_unmount="0" fsid="44028" fstype="ext3" mountpoint="/mnt/cluster" name="disk2" options="" self_fence="0"/>
        </resources>
        <service autostart="1" domain="cluster" name="clusterdev">
            <ip ref="192.168.0.238"/>
            <fs ref="disk2"/>
            <script file="/etc/init.d/ntpd" name="ntp"/>
        </service>
    </rm>
</cluster>

And of course, don't forget to run services:

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service ccsd restart
service cman restart
service fenced restart
service rgmanager restart

If you want to stop the cluster, do it in the reverse order:

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service rgmanager stop
service fenced stop
service cman stop
service ccsd stop

It's very important to stop in this order!