Open Stack

On 08/29/2018 12:39 PM, Dan Smith wrote:
> If we're going to discuss removing move operations from Nova, we should
> do that in another thread. This one is about making existing operations
> work :)

OK, understood. :)

>> The admin only "owns" the instance because we have no ability to
>> transfer ownership of the instance and a cell isn't a user-visible
>> thing. An external script that accomplishes this kind of orchestrated
>> move from one cell to another could easily update the ownership of
>> said instance in the DB.
> 
> So step 5 was "do surgery on the database"? :)

Yep. You'd be surprised how often that ends up being the case.

I'm currently sitting here looking at various integration tooling for 
doing just this kind of thing for our deployments of >150K baremetal 
compute nodes. The number of specific-to-an-environment variables that 
need to be considered and worked into the overall migration plan is 
breathtaking. And trying to do all of that inside of Nova just isn't 
feasible for the scale at which we run.

At least, that's my point of view. I won't drag this conversation out 
any further on tangents.

Best,
-jay