service vz start
Starting OpenVZ: failed to load module vzmon [FAILED]
vzmon: Unknown symbol ve_snmp_proc_init
vzmon: Unknown symbol addrconf_sysctl_free
vzmon: Unknown symbol ve_ndisc_init
vzmon: Unknown symbol addrconf_ifdown
vzmon: Unknown symbol ip6_frag_cleanup
vzmon: Unknown symbol fini_ve_route6
vzmon: Unknown symbol addrconf_sysctl_init
vzmon: Unknown symbol ve_snmp_proc_fini
vzmon: Unknown symbol ve_ndisc_fini
vzmon: Unknown symbol init_ve_route6
vzmon: Unknown symbol addrconf_sysctl_fini
make sure ipv6 is getting loaded (I had mine disabled in /etc/modprobe.conf)
openvz, module, vzmon, vz, ve_snmp_proc_init, addrconf_sysctl_free, ve_ndisc_init, addrconf_ifdown, ip, _frag_cleanup, fini_ve_route, addrconf_sysctl_init, ve_snmp_proc_fini, ve_ndisc_fini, init_ve_route, addrconf_sysctl_fini, ipv, disabled, etc, modprobe, conf,