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[OCTAVIA][ROCKY] - MASTER & BACKUP instances unexpectedly deleted by octavia


Hi Felix,

« Glad » you had the same issue before, and yes of course I looked at the HM
logs which is were I actually found out that this event was triggered by
octavia (Beside the DB data that validated that) here is my log trace
related to this event, It doesn't really shows major issue IMHO.

Here is the stacktrace that our octavia service archived for our both
controllers servers, with the initial loadbalancer creation trace
(Worker.log) and both controllers triggered task (Health-Manager.log).

http://paste.openstack.org/show/7z5aZYu12Ttoae3AOhwF/

I well may have miss something in it, but I don't see something strange on
from my point of view.
Feel free to tell me if you spot something weird.


Le mar. 4 juin 2019 à 10:38, Felix Hüttner <felix.huettner at mail.schwarz> a
écrit :

> Hi Gael,
>
>
>
> we had a similar issue in the past.
>
> You could check the octiava healthmanager log (should be on the same node
> where the worker is running).
>
> This component monitors the status of the Amphorae and restarts them if
> they donâ??t trigger a callback after a specific time. This might also happen
> if there is some connection issue between the two components.
>
>
>
> But normally it should at least restart the LB with new Amphoraeâ?¦
>
>
>
> Hope that helps
>
>
>
> Felix
>
>
>
> *From:* Gaël THEROND <gael.therond at gmail.com>
> *Sent:* Tuesday, June 4, 2019 9:44 AM
> *To:* Openstack <openstack at lists.openstack.org>
> *Subject:* [OCTAVIA][ROCKY] - MASTER & BACKUP instances unexpectedly
> deleted by octavia
>
>
>
> Hi guys,
>
>
>
> Iâ??ve a weird situation here.
>
>
>
> I smoothly operate a large scale multi-region Octavia service using the
> default amphora driver which imply the use of nova instances as
> loadbalancers.
>
>
>
> Everything is running really well and our customers (K8s and traditional
> users) are really  happy with the solution so far.
>
>
>
> However, yesterday one of those customers using the loadbalancer in front
> of their ElasticSearch cluster poked me because this loadbalancer suddenly
> passed from ONLINE/OK to ONLINE/ERROR, meaning the amphoras were no longer
> available but yet the anchor/member/pool and listeners settings were still
> existing.
>
>
>
> So I investigated and found out that the loadbalancer amphoras have been
> destroyed by the octavia user.
>
>
>
> The weird part is, both the master and the backup instance have been
> destroyed at the same moment by the octavia service user.
>
>
>
> Is there specific circumstances where the octavia service could decide to
> delete the instances but not the anchor/members/pool ?
>
>
>
> Itâ??s worrying me a bit as there is no clear way to trace why does Octavia
> did take this action.
>
>
>
> I digged within the nova and Octavia DB in order to correlate the action
> but except than validating my investigation it doesnâ??t really help as there
> are no clue of why the octavia service did trigger the deletion.
>
>
>
> If someone have any clue or tips to give me Iâ??ll be more than happy to
> discuss this situation.
>
>
>
> Cheers guys!
> Hinweise zum Datenschutz finden Sie hier <https://www.datenschutz.schwarz>.
>
>
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