[openstack-dev] [nova][searchlight] When do instances get removed from Searchlight?

Zhenyu Zheng zhengzhenyulixi at gmail.com
Mon Mar 6 02:09:28 UTC 2017

Hi, Matt

AFAIK, searchlight did delete the record, it catch the instance.delete
notification and perform the action:

I will double check with others from the SL team, and if it is the case, we
will try to find a way to solve this ASAP.


Kevin Zheng

On Mon, Mar 6, 2017 at 1:21 AM, Matt Riedemann <mriedemos at gmail.com> wrote:

> I've posted a spec [1] for nova's integration with searchlight for listing
> instance across multiple cells. One of the open questions I have on that is
> when/how do instances get removed from searchlight?
> When an instance gets deleted via the compute API today, it's not really
> deleted from the database. It's considered "soft" deleted and you can still
> list (soft) deleted instances from the database via the compute API if
> you're an admin.
> Nova will be sending instance.destroy notifications to searchlight but we
> don't really want the ES entry removed because we still have to support the
> compute API contract to list deleted instances. Granted, this is a pretty
> limp contract because there is no guarantee that you'll be able to list
> those deleted instances forever because once they get archived (moved to
> shadow tables in the nova database) or purged (hard delete), then they are
> gone from that API query path.
> So I'm wondering at what point instances stored in searchlight will be
> removed. Maybe there is already an answer to this and the searchlight team
> can just inform me. Otherwise we might need to think about data retention
> policies and how long a deleted instances will be stored in searchlight
> before it's removed. Again, I'm not sure if nova would control this or if
> it's something searchlight supports already.
> [1] https://review.openstack.org/#/c/441692/
> --
> Thanks,
> Matt Riedemann
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