Upcoming upgrade of LLVM buildbot

[Galina Kistanova via cfe-commits]

Hello everyone,

Starting tomorrow we will be upgrading the staging and production LLVM
build bot.

To make the transition smooth we would not accept any change to zorg from
tomorrow 11:00 AM PDT till the production bot is up and running the new
version. Please feel free to talk to me if you will have a special
situation and if you would absolutely have to make changes. Thanks for your
patience and understanding.

If you are a bot owner, you do not need to do anything at this point,
unless I'll ask you to help.

Here is the plan.

* Tomorrow, on September 30th, 2020, at 11:00 AM PDT we will upgrade the
staging build bot to buildbot v2.8.4.

If you are an owner of one of the staged builders, you would not need to do
anything. The staging will go down for a short period of time, and then a
new version will come up and will accept connections from your bots.

We will be watching the staging and will be improving zorg for the next
week or so. Meaning that staging will be restarted more often than before,
and restarts will be done without further notices.

* Once the staging is reliable you may want to move your bot from
production to staging to make sure it will work as expected after the
upgrade. I will send a note when this could be done.

* After staging is good and we have about a week of running history, we
will upgrade the production bot. I will send a separate announcement for
this closer to the date.

Once the production is up and running, I will need your feedback about
blame e-mails delivery, IRC reporting issues, and anything you could spot
wrong with the new bot. I  hope the transition will go smoothly and we will
handle issues quickly if any would come up.

* After production is good and we have about a week of running history,
I'll ask the bot owners to upgrade buildbots on their side. Please do not
upgrade your buildbots unless I'll ask you to. We are trying to limit a
number of moving parts at this stage.

Thanks for your support and help. And please feel free to ask if you have
questions.

Galina


On Thu, Sep 10, 2020 at 9:35 PM Galina Kistanova <gkistanova at gmail.com>
wrote:

> Hello everyone,
>
> The buildbot upgrade is entering the phase when the results to become
> visible.
>
> No change is required at this time on any of the builders. The bot owners
> could upgrade the buildbot on build computers later, at their convenience,
> as this is not on the critical path.
>
> We are going to upgrade the staging bot first. Then, once that is stable
> and all detected issues are resolved, we will upgrade the production bot.
>
> I will need some help with testing, and will be asking to move some of the
> builders temporarily to the staging. LLVM buildbot is a piece of critical
> infrastructure, so more eyes and hands in making sure it works properly the
> better.
>
> I'll be posting updates and ETA of particular changes in this thread.
>
> Please feel free to ask if you have any questions or concerns.
>
> Thanks
>
> Galina
>
>
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