[CentOS-virt] Test new xen, centos-release-xen and kernel for auto grub update on kernel install

[George Dunlap]

On Fri, Oct 10, 2014 at 2:41 AM, Johnny Hughes <johnny at centos.org> wrote:
> The new process for auto updates of grub upon kernel install is in the
> xen4centos testing repo.
>
> In order to test these as updates to an existing system, you can do this:
>
> 1. download the test repo file:
>
> http://dev.centos.org/centos/6/xen-c6-RC1/xen-c6-RC1.repo
>
> 2. Put it in /etc/yum.repos.d/
>
> 3. Issue this command:
>
> yum --disablerepo=Xen4CentOS upgrade xen\* centos-release-xen
>
> (that should install all the new files required to make the kernel
> update work automatically)
>
> 4.  Review the new file /etc/sysconfig/xen-kernel ... if there is any
> other items you want on the 'kernel /xen.gz' line, you would edit the
> file.  For example, I like to add  'com1=115200,8n1 console=com1' to the
> end of that line so I can use consoles in virsh.  So I would change the
> line:

Hmm -- so I take it that /etc/sysconfig/xen-kernel is now a part of
the xen package...?

One issue with this is that during normal Xen development I often make
an RPM directly from the upstream repo, so while I have the xen4centos
kernel & libvirt installed, I don't have a xen4centos xen installed.

The nice thing about the current script in centos-release-xen is that
it works with non-x4c xen packages.

Sorry I hadn't thought about that side-effect when you mentioned this
before. :-/

Any thoughts?  Would it be possible to have the script in
centos-release-xen and check for the existence of /boot/xen.gz, for
instance?

 -George