[openstack-dev] [nova] reboot a rescued instance?

Matt Riedemann mriedemos at gmail.com
Fri May 4 13:50:08 UTC 2018

For full details on this, see the IRC conversation [1].

tl;dr: the nova compute manager and xen virt driver assume that you can 
reboot a rescued instance [2] but the API does not allow that [3] and as 
far as I can tell, it never has.

I can only assume that Rackspace had an out of tree change to the API to 
allow rebooting a rescued instance. I don't know why that wouldn't have 
been upstreamed, but the upstream API doesn't allow it. I'm also not 
aware of anything internal to nova that reboots an instance in a rescued 

So the question now is, should we add rescue to the possible states to 
reboot an instance in the API? Or just rollback this essentially dead 
code in the compute manager and xen virt driver? I don't know if any 
other virt drivers will support rebooting a rescued instance.





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