[queens][nova] nova host-evacuate errot

Jay See jayachander.it at gmail.com
Thu Jul 11 09:48:21 UTC 2019

Hi Ignazio,

I am trying to evacuate the compute host on older version (mitaka).
Could please share the process you followed. I am not able to succeed with
openstack live-migration fails with error message (this is known issue in
older versions) and nova live-ligration - nothing happens even after
initiating VM migration. It is almost 4 days.


On Thu, Jul 11, 2019 at 11:31 AM Ignazio Cassano <ignaziocassano at gmail.com>

> I am sorry.
> For simulating an host crash I used a wrong procedure.
> Using  "echo 'c' > /proc/sysrq-trigger" all work fine
> Il giorno gio 11 lug 2019 alle ore 11:01 Ignazio Cassano <
> ignaziocassano at gmail.com> ha scritto:
>> Hello All,
>> on ocata when I  poweroff a node with active instance , doing a nova
>> host-evacuate works  fine
>> and instances are restartd on an active node.
>> On queens it does non evacuate instances but nova-api reports for each
>> instance the following:
>> 2019-07-11 10:19:54.745 13811 INFO nova.api.openstack.wsgi
>> [req-daad0a7d-87ce-41bf-b096-a70fc306db5c 0c7a2d6006614fe2b3e81e47377dd2a9
>> c26f8d35f85547c4add392a221af1aab - default default] HTTP exception thrown:
>> Cannot 'evacuate' instance e8485a5e-3623-4184-bcce-cafd56fa60b3 while it is
>> in task_state powering-off
>> So it poweroff all instance on the failed node but does not start them on
>> active nodes
>> What is changed ?
>> Ignazio

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