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Hello Tzach,

Agree for a graceful shutdown there should be some steps ahead. Im 
actually asking the question because the hardware we use has a high 
failure rate on RAID controllers. The physical machine reacts with a 
reboot, so its not controlable from our side. We dont want to delete the 
instances at all, its just about the Instance shutdown/process kill.

Got a good answer already:
If you are using CentOS  / Red Hat you can modify this file:
/etc/sysconfig/libvirt-guests
libvirt-guests:#ON_SHUTDOWN=suspend


Thanks for your answer!

Cheers Chris


On 2017-11-02 15:54, Tzach Shefi wrote:
> Hi, 
> 
> A better Q would be why do you shutdown a compute node to begin with?
> I mean if you need you should do so in an orderly fashion basically
> excavate instances
> 
> or shut instances down manually, put the compute node in maintenance
> mode. 
> On rebooting compute node remove it from maintenance mode, turn on
> instances or migrate them back to this compute node should you need. 
> Od delete them if you wish. 
> 
> There is this nova option:
> resume_guests_state_on_host_boot=true
> 
> But it doesn't delete or shutdown instances but rather turns them on
> automatically once compute host resumes. 
> which might also work for you, probably not just mentioning it any
> way.  
> 
> I don't know of an option to stop/delete instance on compute node
> shutdown. 
> 
> Another option check maybe you could shelve suspended instance and
> then later delete them. 
> 
> Shelving stops the instance and takes a snapshot of it. Then depending
> on the value of the shelved_offload_time config option, the instance
> is deleted from the hypervisor (0), never deleted (-1), or deleted
> after some period of time (> 0). Note that it's just destroying the
> backing instance on the hypervisor, the actual instance in the nova
> database is not deleted. Then you can later unshelve the instance:
> 
> This might help, but do not if you mess with kvm without updating Nova
> you might be left haning else where :)
> https://ask.fedoraproject.org/en/question/8796/make-libvirt-to-shutdown-my-guests-not-suspend/
> [2]
> 
>  
> 
> On Thu, Nov 2, 2017 at 9:03 AM, Chris <contact at progbau.de> wrote:
> 
>> Hello,
>> 
>> When we shut down a compute node the instances running on it get
>> suspended. This generates some difficulties with some applications
>> like RabbitMQ dont like to be suspended. Is there a way to change
>> this behavior so that the running instances gets killed or shutdown
>> instead?
>> 
>> Thanks in advance.
>> 
>> Cheers,
>> Chris
>> 
>> _______________________________________________
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> 
> --
> 
> Tzach Shefi
> 
> Senior Quality Engineer, RHCSA
> 
> Red Hat
> 
>  tshefi at redaht.com    M: +972-54-4701080 [3]     IM: tshefi
> 
> 		 [4]
> 
> 
> 
> Links:
> ------
> [1] http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
> [2]
> https://ask.fedoraproject.org/en/question/8796/make-libvirt-to-shutdown-my-guests-not-suspend/
> [3] tel:+972-54-4701080
> [4] https://red.ht/sig