[openstack-dev] [nova] Notification update week 17

Matt Riedemann mriedemos at gmail.com
Tue Apr 24 17:18:46 UTC 2018

On 4/23/2018 8:07 AM, Bal√°zs Gibizer wrote:
> Add versioned notifications for removing a member from a server group
> ---------------------------------------------------------------------
> The specless bp
> https://blueprints.launchpad.net/nova/+spec/add-server-group-remove-member-notifications 
> is pending approval as we would like to see the POC code first. Takashi
> has been proposed the POC code https://review.openstack.org/#/c/559076/
> so we have to look at it.

I took a look at the patch and am -1 for the new "up-call" introduced 
from the compute service when deleting a server. Overall I'm against 
this blueprint for three reasons:

1. I don't see what need we have for this blueprint since I'm not 
hearing a request from a user for it. Maybe it's just for parity with 
the server group member add notification? I don't think that is 
sufficient justification though.

2. The discussion in the blueprint whiteboard mentions that we don't 
need the remove member notification for rolling back on over-quota 
during server create.

3. The new up-call from nova-compute is a non-starter for me. We need to 
shrink the list of things that perform calls up from a child cell to the 
API database.




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