Hi all, Is it possible to reload the dom0 / host node's kernel with a newer one, without rebooting the server? I know kexec can do something like this for security patches, but I don't know much about kexec, and I don't want to mess up a production server either. So, has anyone done something like this before? I need to load a new kernel for one of the domU's iptables to work, but don't want to reboot the whole server and cause downtime for the other domU's. -- Kind Regards Rudi Ahlers CEO, SoftDux Hosting Web: http://www.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532
> -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Rudi Ahlers > Sent: Wednesday, December 02, 2009 2:23 PM > To: CentOS mailing list > Subject: [CentOS] (re)load new kernel with rebooting host node? > > Hi all, > > Is it possible to reload the dom0 / host node's kernel with a newer > one, without rebooting the server? I know kexec can do something like > this for security patches, but I don't know much about kexec, and I > don't want to mess up a production server either. So, has anyone done > something like this before? I need to load a new kernel for one of the > domU's iptables to work, but don't want to reboot the whole server and > cause downtime for the other domU's.--- You're a lot better off go over to the Linux Kernel Devel site. AFIK kexec can only do this on real hardware. I think your better off scheduling downtime for the server. Although kexec does have a site page. John
Mathew S. McCarrell
2009-Dec-02 20:36 UTC
[CentOS] (re)load new kernel with rebooting host node?
On Wed, Dec 2, 2009 at 2:22 PM, Rudi Ahlers <Rudi at softdux.com> wrote:> Hi all, > > Is it possible to reload the dom0 / host node's kernel with a newer > one, without rebooting the server? I know kexec can do something like > this for security patches, but I don't know much about kexec, and I > don't want to mess up a production server either. So, has anyone done > something like this before? I need to load a new kernel for one of the > domU's iptables to work, but don't want to reboot the whole server and > cause downtime for the other domU's. > >http://www.ksplice.com/ -- Mathew S. McCarrell Clarkson University '10 mccarrms at gmail.com mccarrms at clarkson.edu 1-518-314-9214 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20091202/d92f3bd7/attachment-0001.html>