Re: [PATCH] gitlab-ci/cirrus: Increase timeout to 80 minutes

[Daniel P . Berrangé]

On Tue, Nov 16, 2021 at 05:33:09PM +0100, Thomas Huth wrote:
> The jobs on Cirrus-CI sometimes get delayed quite a bit, waiting to
> be scheduled, so while the build test itself finishes within 60 minutes,
> the total run time of the jobs can be longer due to this waiting time.
> Thus let's increase the timeout on the gitlab side a little bit, so
> that these jobs are not marked as failing just because of the delay.

On a successful pipeline I see

 freebsd-11  - 28 minutes
 freebsd-12  - 57 minutes
 macos       - 30 minutes

We know cirrus allows 2 concurrent jobs, so from that I infer
that the freebsd-12 job was queued for ~30 minutes waiting for
either the freebsd-11 or macos job to finish, and then it
ran in 30 minutes, giving the ~60 minute total.

That's too close to the 60 minute gitlab default job timeout
for comfort - it can easily slip over 60 minutes by just a
small amount.

80 minutes will certainly help in the case where we
randomly take a little longer than 30 minutes to build,
and have 1 of the 3 jobs queued.

When we're running jobs on both master + staging, we can
have 2 jobs running and 4 more queued - 2 of those queued
might just finish in time, but 2 will definitely fail.
My patch will cut these extra jobs on master, so in common
case we only ever get 1 queued, which should work well in
combo with your patch here. That should be good enough
for the qemu-project namespace, unless someone is triggering
pipelines for stable branch staging at the same time as
the master branch staging.

If we do want to worry about more than 2 queued jobs
again for that reason, we might consider putting
it upto 100 minutes. That would give us enough slack to
have 4 queued jobs behind two running jobs and have
them all succeed

> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  .gitlab-ci.d/cirrus.yml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/.gitlab-ci.d/cirrus.yml b/.gitlab-ci.d/cirrus.yml
> index e7b25e7427..22d42585e4 100644
> --- a/.gitlab-ci.d/cirrus.yml
> +++ b/.gitlab-ci.d/cirrus.yml
> @@ -14,6 +14,7 @@
>    stage: build
>    image: registry.gitlab.com/libvirt/libvirt-ci/cirrus-run:master
>    needs: []
> +  timeout: 80m
>    allow_failure: true
>    script:
>      - source .gitlab-ci.d/cirrus/$NAME.vars

Whether 80 or 100 minute, consider it

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


Regards,
Daniel
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