I believe the document you are following is for RHEL 4. The packages I typically pull are as follows. They will pull in others as needed.
################################# RHCS Specific Packages #cman.x86_64 #openais.x86_64 #lvm2-cluster.x86_64 #gfs2-utils.x86_64 #rgmanager.x86_64 #system-config-cluster.noarch #luci.x86_64 #ricci.x86_64
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