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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">A few thoughts from my side is scope of brainstorm:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo3"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Recheck actual bugs (“recheck bug 123456”)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">not a new idea to better keep track of all failures<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">force a developer to investigate the reason of each CI failure and increase corresponding bug rating, or file a new bug (or go and fix this bug finally!)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">this implies having some gate failure bugs dashboard with hottest bugs on top<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">simple “recheck” could be forbidden, at least during “crisis management” window<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo3"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Allow recheck TIMEOUT/POST_FAILURE jobs<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">while I agree that re-run particular jobs is evil, TIMEOUT/POST_FAILURE are not related to the patch in majority of cases<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">performance issues are usually caught by Rally jobs<a name="_MailEndCompose"><o:p></o:p></a></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">of course core team should monitor if timeouts become a rule for some jobs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo3"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Ability to block rechecks in some cases, like known gate blocker<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">not everyone is always aware that gates are blocked with some issue<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">PTL (or any core team member) can turn off rechecks during that time (with a message from Zuul)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:1.0in;text-indent:-.25in;mso-list:l0 level2 lfo3">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">happens not often but still can save some CI resources<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Oleg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%">---<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%">Advanced Software Technology Lab<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%">Huawei<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F4E79;mso-style-textfill-fill-color:#1F4E79;mso-style-textfill-fill-alpha:100.0%"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Rodolfo Alonso Hernandez [mailto:ralonsoh@redhat.com]
<br>
<b>Sent:</b> Monday, November 22, 2021 11:54 AM<br>
<b>To:</b> Ronelle Landy <rlandy@redhat.com><br>
<b>Cc:</b> Balazs Gibizer <balazs.gibizer@est.tech>; Slawek Kaplonski <skaplons@redhat.com>; openstack-discuss <openstack-discuss@lists.openstack.org>; Oleg Bondarev <oleg.bondarev@huawei.com>; lajos.katona@ericsson.com; Bernard Cafarelli <bcafarel@redhat.com>;
Miguel Lavalle <miguel@mlavalle.com><br>
<b>Subject:</b> Re: [neutron][CI] How to reduce number of rechecks - brainstorming<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I think the last idea Ronelled presented (a skiplist) could be feasible in Neutron. Of course, this list could grow indefinitely, but we can always keep an eye on it.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">There could be another issue with Neutron tempest tests when using the "advance" image. Despite the recent improvements done recently, we are frequently having problems with the RAM size of the testing VMs. We would like to have 20% more
RAM, if possible. I wish we had the ability to pre-run some checks in specific HW (tempest plugin or grenade tests).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Slawek commented the different number of backends we need to provide support and testing. However I think we can remove the Linux Bridge tempest plugin from the "gate" list (it is already tested in the "check" list). Tempest plugin tests
are expensive in time and prone to errors.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">This paragraph falls under the shoulders of the Neutron team. We can also identify those long running tests that usually fail (those that take more than 1000 seconds). A test that takes around 15 mins to run, will probably fail. We need
to find those tests, investigate the slowest parts of those tests and try to improve/optimize/remove them.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you all for your comments and proposals. That will help a lot to improve the Neutron CI stability.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Fri, Nov 19, 2021 at 12:53 AM Ronelle Landy <<a href="mailto:rlandy@redhat.com">rlandy@redhat.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Nov 17, 2021 at 5:22 AM Balazs Gibizer <<a href="mailto:balazs.gibizer@est.tech">balazs.gibizer@est.tech</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
On Wed, Nov 17 2021 at 09:13:34 AM +0100, Slawek Kaplonski <br>
<<a href="mailto:skaplons@redhat.com" target="_blank">skaplons@redhat.com</a>> wrote:<br>
> Hi,<br>
> <br>
> Recently I spent some time to check how many rechecks we need in <br>
> Neutron to<br>
> get patch merged and I compared it to some other OpenStack projects <br>
> (see [1]<br>
> for details).<br>
> TL;DR - results aren't good for us and I think we really need to do <br>
> something<br>
> with that.<br>
<br>
I really like the idea of collecting such stats. Thank you for doing <br>
it. I can even imagine to make a public dashboard somewhere with this <br>
information as it is a good indication about the health of our projects <br>
/ testing.<br>
<br>
> <br>
> Of course "easiest" thing to say is that we should fix issues which <br>
> we are<br>
> hitting in the CI to make jobs more stable. But it's not that easy. <br>
> We are<br>
> struggling with those jobs for very long time. We have CI related <br>
> meeting<br>
> every week and we are fixing what we can there.<br>
> Unfortunately there is still bunch of issues which we can't fix so <br>
> far because<br>
> they are intermittent and hard to reproduce locally or in some cases <br>
> the<br>
> issues aren't realy related to the Neutron or there are new bugs <br>
> which we need<br>
> to investigate and fix :)<br>
<br>
<br>
I have couple of suggestion based on my experience working with CI in <br>
nova.<o:p></o:p></p>
</blockquote>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">We've struggled with unstable tests in TripleO as well. Here are some things we tried and implemented:<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">1. Created job dependencies so we only ran check tests once we knew we had the resources we needed (example we had pulled containers successfully)<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">2. Moved some testing to third party where we have easier control of the environment (note that third party cannot stop a change merging) <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">3. Used dependency pipelines to pre-qualify some dependencies ahead of letting them run wild on our check jobs<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">4. Requested testproject runs of changes in a less busy environment before running a full set of tests in a public zuul <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">5. Used a skiplist to keep track of tech debt and skip known failures that we could temporarily ignore to keep CI moving along if we're waiting on an external fix.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
1) we try to open bug reports for intermittent gate failures too and <br>
keep them tagged in a list [1] so when a job fail it is easy to check <br>
if the bug is known.<br>
<br>
2) I offer my help here now that if you see something in neutron runs <br>
that feels non neutron specific then ping me with it. Maybe we are <br>
struggling with the same problem too.<br>
<br>
3) there was informal discussion before about a possibility to re-run <br>
only some jobs with a recheck instead for re-running the whole set. I <br>
don't know if this is feasible with Zuul and I think this only treat <br>
the symptom not the root case. But still this could be a direction if <br>
all else fails.<br>
<br>
Cheers,<br>
gibi<br>
<br>
> So this is never ending battle for us. The problem is that we have <br>
> to test<br>
> various backends, drivers, etc. so as a result we have many jobs <br>
> running on<br>
> each patch - excluding UT, pep8 and docs jobs we have around 19 jobs <br>
> in check<br>
> and 14 jobs in gate queue.<br>
> <br>
> In the past we made a lot of improvements, like e.g. we improved <br>
> irrelevant<br>
> files lists for jobs to run less jobs on some of the patches, <br>
> together with QA<br>
> team we did "integrated-networking" template to run only Neutron and <br>
> Nova<br>
> related scenario tests in the Neutron queues, we removed and <br>
> consolidated some<br>
> of the jobs (there is still one patch in progress for that but it <br>
> should just<br>
> remove around 2 jobs from the check queue). All of that are good <br>
> improvements<br>
> but still not enough to make our CI really stable :/<br>
> <br>
> Because of all of that, I would like to ask community about any other <br>
> ideas<br>
> how we can improve that. If You have any ideas, please send it in <br>
> this email<br>
> thread or reach out to me directly on irc.<br>
> We want to discuss about them in the next video CI meeting which will <br>
> be on<br>
> November 30th. If You would have any idea and would like to join that<br>
> discussion, You are more than welcome in that meeting of course :)<br>
> <br>
> [1] <br>
> <a href="http://lists.openstack.org/pipermail/openstack-discuss/2021-November/" target="_blank">
http://lists.openstack.org/pipermail/openstack-discuss/2021-November/</a><br>
> 025759.html<br>
<br>
<br>
[1] <br>
<a href="https://bugs.launchpad.net/nova/+bugs?field.tag=gate-failure&orderby=-date_last_updated&start=0" target="_blank">https://bugs.launchpad.net/nova/+bugs?field.tag=gate-failure&orderby=-date_last_updated&start=0</a><br>
<br>
<br>
> <br>
> --<br>
> Slawek Kaplonski<br>
> Principal Software Engineer<br>
> Red Hat<br>
<br>
<br>
<o:p></o:p></p>
</blockquote>
</div>
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