Re: [Xen-users] Recommended Best way to Upgrade/Update Xen

[Andrew Finkenstadt <andy@xxxxxxxxxxxxxxx>]

This is a good question to know.  Much will depend on what you mean by "Xen" and updating "Xen".

In my particular case, I run generic Distro-based Xen 3.0.x under CentOS 5.7, and will be upgrading to GITCO-based Xen 4.1.2.  My upgrade steps are

Distribution Install:

# yum update

# yum groupinstall Xen

==> or yum groupinstall Virtualization, before CentOS 5.8 had been released.

# vi /etc/grub.conf

==> change default= to use the Xen kernel= stanza.

# reboot

Upgrade install to 4.1.2:

# cd /etc/yum.repos.d

# wget http://www.gitco.de/repo/GITCO-XEN4.1.2_x86_64.repo

# rpm -e --nodeps libvirt.i386

# rpm -e --nodeps libvirt.x86_64

# rpm -e --nodeps libvirt-python

# yum update

# vi /etc/grub.conf

==> consider whether your hardware requires pci=nomsi on the module=vmlinuz line of the active stanzas.  Dell R610 with MegaRAID requires it.

# reboot

--Andy

On Thu, May 10, 2012 at 4:30 PM, <cyberhawk001@xxxxxxxxx> wrote:

This might be a silly question for most, but since Xen is ever so changing with regular changesets and updates, what is the "best practice" way to upgrade / update or even downgrade Xen?

1.) Is it by booting into regular Linux Kernel without Xen, do a complete uninstall of the old Xen, than install the newly compiled Xen?

2.) Is it by booting into regular Linux Kernel without Xen, than install the newly compiled Xen, were it will / should overwrite everything with the new version?



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