[openstack-dev] [heat][infra] Help needed! high gate failure rate

Rabi Mishra ramishra at redhat.com
Thu Aug 10 11:04:18 UTC 2017

On Thu, Aug 10, 2017 at 2:51 PM, Ian Wienand <iwienand at redhat.com> wrote:

> On 08/10/2017 06:18 PM, Rico Lin wrote:
> > We're facing a high failure rate in Heat's gates [1], four of our gate
> > suffering with fail rate from 6 to near 20% in 14 days. which makes most
> of
> > our patch stuck with the gate.
> There have been a confluence of things causing some problems recently.
> The loss of OSIC has distributed more load over everything else, and
> we have seen an increase in job timeouts and intermittent networking
> issues (especially if you're downloading large things from remote
> sites).  There have also been some issues with the mirror in rax-ord
> [1]
> > gate-heat-dsvm-functional-convg-mysql-lbaasv2-ubuntu-xenial(19.67%)
> > gate-heat-dsvm-functional-convg-mysql-lbaasv2-non-
> apache-ubuntu-xenia(9.09%)
> > gate-heat-dsvm-functional-orig-mysql-lbaasv2-ubuntu-xenial(8.47%)
> > gate-heat-dsvm-functional-convg-mysql-lbaasv2-py35-ubuntu-xenial(6.00%)
> > We still try to find out what's the cause but (IMO,) seems it might be
> some
> > thing wrong with our infra. We need some help from infra team, to know if
> > any clue on this failure rate?
> The reality is you're just going to have to triage this and be a *lot*
> more specific with issues.

One of the issues we see recently is that, many jobs killed mid way through
the tests as the job times out(120 mins).  It seems jobs are many times
scheduled to very slow nodes, where setting up devstack takes more than 80


I find opening an etherpad and going
> through the failures one-by-one helpful (e.g. I keep [2] for centos
> jobs I'm interested in).
> Looking at the top of the console.html log you'll have the host and
> provider/region stamped in there.  If it's timeouts or network issues,
> reporting to infra the time, provider and region of failing jobs will
> help.  If it's network issues similar will help.  Finding patterns is
> the first step to understanding what needs fixing.
> If it's due to issues with remote transfers, we can look at either
> adding specific things to mirrors (containers, images, packages are
> all things we've added recently) or adding a caching reverse-proxy for
> them ([3],[4] some examples).
> Questions in #openstack-infra will usually get a helpful response too
> Good luck :)
> -i
> [1] https://bugs.launchpad.net/openstack-gate/+bug/1708707/
> [2] https://etherpad.openstack.org/p/centos7-dsvm-triage
> [3] https://review.openstack.org/491800
> [4] https://review.openstack.org/491466
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Rabi Misra
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