[CentOS-virt] Xen CentOS 7.3 server + CentOS 7.3 VM fails to boot after CR updates (applied to VM)!

Fri Sep 1 21:44:32 UTC 2017
Kevin Stange <kevin at steadfast.net>

On 09/01/2017 02:41 PM, Kevin Stange wrote:
> On 08/31/2017 07:50 AM, PJ Welsh wrote:
>> A recently created and fully functional CentOS 7.3 VM fails to boot
>> after applying CR updates:
> <snip>
>> Server OS is CentOS 7.3 using Xen (no CR updates):
>> rpm -qa xen\*
>> xen-hypervisor-4.6.3-15.el7.x86_64
>> xen-4.6.3-15.el7.x86_64
>> xen-licenses-4.6.3-15.el7.x86_64
>> xen-libs-4.6.3-15.el7.x86_64
>> xen-runtime-4.6.3-15.el7.x86_64
>>
>> uname -a
>> Linux tsxen2.xx.com <http://tsxen2.xx.com> 4.9.39-29.el7.x86_64 #1 SMP
>> Fri Jul 21 15:09:00 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
>>
>> Sadly, the other issue is that the grub menu will not display for me to
>> select another kernel to see if it is just a kernel issue.
>>
>> The dracut prompt does not show any /dev/disk folder either.
>>
> 
> I'm seeing this as well.  My host is 4.9.44-29 and Xen 4.4.4-26 from
> testing repo, my guest is 3.10.0-693.1.1.  Guest boots fine with
> 514.26.2.  The kernel messages that appear to kick off the failure for
> me start with a page allocation failure.  It eventually reaches dracut
> failures due to systemd/udev not setting up properly, but I think the
> root is this:
> 

I created bugs for this issue (at least as I'm able to reproduce it):

https://bugs.centos.org/view.php?id=0013763
https://bugzilla.redhat.com/show_bug.cgi?id=1487754

Please add any extra information you might have to hopefully increase
the chance the problem gets fixed.

-- 
Kevin Stange
Chief Technology Officer
Steadfast | Managed Infrastructure, Datacenter and Cloud Services
800 S Wells, Suite 190 | Chicago, IL 60607
312.602.2689 X203 | Fax: 312.602.2688
kevin at steadfast.net | www.steadfast.net