It looks to me like there are specific jobs on specific providers that are not functioning correctly. 

I will pick on Fort Nebula for a minute.

tacker-functional-devstack-multinode just doesn't seem to work, but most of the other jobs that do something similar work ok. 

You can see the load on Fort Nebula here, and by looking at the data I don't see any issues with it being overloaded/oversubscribed. 
https://grafana.fortnebula.com/d/9MMqh8HWk/openstack-utilization?orgId=2&refresh=30s&from=now-12h&to=now

Also most jobs are IO/Memory bound and Fort Nebula uses local NVME for all of the Openstack Jobs.. There isn't a reasonable way to make it any faster.

With that said, I would like to get to the bottom of it. It surely doesn't help anyone to have jobs be failing for non code related reasons. 

~/D

On Sun, Sep 22, 2019 at 12:58 PM Mark Goddard <mark@stackhpc.com> wrote:


On Sun, 22 Sep 2019, 16:39 Matt Riedemann, <mriedemos@gmail.com> wrote:
I noticed this while looking at a grenade failure on an unrelated patch:

https://bugs.launchpad.net/nova/+bug/1844929

The details are in the bug but it looks like this showed up around Sept
17 and hits mostly on FortNebula nodes but also OVH nodes. It's
restricted to grenade jobs and while I don't see anything obvious in the
rabbitmq logs (the only errors are about uwsgi [api] heartbeat issues),
it's possible that these are slower infra nodes and we're just not
waiting for something properly during the grenade upgrade. We also don't
seem to have the mysql logs published during the grenade jobs which we
need to fix (and recently did fix for devstack jobs [1] but grenade jobs
are still using devstack-gate so log collection happens there).

I didn't see any changes in nova, grenade or devstack since Sept 16 that
look like they would be related to this so I'm guessing right now it's
just a combination of performance on certain infra nodes (slower?) and
something in grenade/nova not restarting properly or not waiting long
enough for the upgrade to complete.

Julia recently fixed an issue in ironic caused by a low MTU on fortnebula. May or may not be related.

[1]
https://github.com/openstack/devstack/commit/f92c346131db2c89b930b1a23f8489419a2217dc

--

Thanks,

Matt