Necessary services other than PRIMECLUSTER for PRIMECLUSTER to operate are as follows:
crond.service
ntpd.service, or chronyd.service
radvd.service (*1)
rsyslog.service
ipmi.service (*2)
libvirtd.service (*3)
(*1) The radvd.service is necessary only when both the mode used for duplexing GLS is Fast switching mode and IPv6 communication is used.
(*2) The ipmi.service is necessary when SA_ipm is set in the shutdown facility on PRIMERGY.
(*3) The libvirtd.service is necessary for the KVM environment.