CentOS virt - Jan 2016 - DomU Guests not shutting down nicely when Dom0 Hypervisor shuts down

I am using Xen 4.6.0-8.el7 on CentOS 7 with 3 Linux DomUs. I did have Xen 4.? on
CentOS 6.5 on my previous system. I installed using yum install
centos-release-xen.
On shutting down the Hypervisor it used to wait for the DomUs to shut down
gracefully (one can take a minute or more), then on starting up again it would
restart the DomUs, all nice and controlled.
For some reason the DomUs (CentOS or Ubuntu servers) are not shutting down
nicely when the Hypervisor is shutdown, and not restarting. I have the cfg files
in /etc/xen/auto so they should start up.
If I forget to shut down the DomU guests then the shutdown hangs. 
I am running this on a Dell Poweredge T430 by the way. 
Any ideas why, and how to cure this? 
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Try this:

systemctl start xendomains.service
systemctl enable xendomains.service


On 21 January 2016 at 08:48, Francis Greaves <francis at choughs.net>
wrote:
> I am using Xen 4.6.0-8.el7 on CentOS 7 with 3 Linux DomUs. I did have Xen
> 4.? on CentOS 6.5 on my previous system. I installed using  yum install
> centos-release-xen.
> On shutting down the Hypervisor it used to wait for the DomUs to shut down
> gracefully (one can take a minute or more), then on starting up again it
> would restart the DomUs, all nice and controlled.
> For some reason the DomUs (CentOS or Ubuntu servers) are not shutting down
> nicely when the Hypervisor is shutdown, and not restarting. I have the cfg
> files in /etc/xen/auto so they should start up.
> If I forget to shut down the DomU guests then the shutdown hangs.
> I am running this on a Dell Poweredge T430 by the way.
> Any ideas why, and how to cure this?
>
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
>
>
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On Thu, Jan 21, 2016 at 9:20 AM, Phill Bandelow <phill at onapp.com>
wrote:
> Try this:
>
> systemctl start xendomains.service
> systemctl enable xendomains.service
Yes, the main difference between C6 and C7 from Xen's perspective is
switching from the sysv initscripts to systemd.

It's probably worth enabling xendomains by default, particularly if
they were enabled by default in C6.  I'll put that on my list to do at
some point (unless someone wants to implement it and send me a pull
request).

 -George

Thanks a million for that. 
All working fine now. 
Ragards 


From: "Phill Bandelow" <phill at onapp.com> 
To: "Francis Greaves" <francis at choughs.net>,
"centos-virt" <centos-virt at centos.org>
Sent: Thursday, 21 January, 2016 09:20:40 
Subject: Re: [CentOS-virt] DomU Guests not shutting down nicely when Dom0
Hypervisor shuts down

Try this: 

systemctl start xendomains.service 
systemctl enable xendomains.service 


On 21 January 2016 at 08:48, Francis Greaves < francis at choughs.net >
wrote:



I am using Xen 4.6.0-8.el7 on CentOS 7 with 3 Linux DomUs. I did have Xen 4.? on
CentOS 6.5 on my previous system. I installed using yum install
centos-release-xen.
On shutting down the Hypervisor it used to wait for the DomUs to shut down
gracefully (one can take a minute or more), then on starting up again it would
restart the DomUs, all nice and controlled.
For some reason the DomUs (CentOS or Ubuntu servers) are not shutting down
nicely when the Hypervisor is shutdown, and not restarting. I have the cfg files
in /etc/xen/auto so they should start up.
If I forget to shut down the DomU guests then the shutdown hangs. 
I am running this on a Dell Poweredge T430 by the way. 
Any ideas why, and how to cure this? 

_______________________________________________ 
CentOS-virt mailing list 
CentOS-virt at centos.org 
https://lists.centos.org/mailman/listinfo/centos-virt 





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