How can upgrade kernel on xen main node or container too?
Centos:
on host node
---
yum update
cd /usr/local/lxlabs/hypervm/httpdocs/
lphp.exe ../bin/misc/fixcentos5xen.php
chkconfig xendomains off
nano /etc/grub.conf (set your new kernel as the default)
service xendomains stop
reboot
---
after boot:
cd /usr/local/lxlabs/hypervm/httpdocs/
lphp.exe ../bin/misc/fixcentos5xen.php
login to hypervm and start vps inside the node.
chkconfig xendomains on