[Labs-admin] Labsdb migration (was: Report from ops meeting)

Mon Jan 30 18:54:05 UTC 2017

How about Feb 14? That gives us two weeks.

On Mon, Jan 30, 2017 at 10:33 AM, Jaime Crespo <jcrespo at wikimedia.org> wrote:
> As an admin, everything you should know about the upcoming labsdb1005
> reimage:
>
> * We are ready (DBAs) to do this at any time, we just need to tell users in
> advance of potential outages/degradations of service
> * For 99% of the users, we will just switchover them transparently to the
> slave (should not cause issues). As usual, if their application does not
> retry to reconnect, there will be problems.
> * For 3 users (databases), there will be full outage because they have such
> a heavy usage that we cannot replicate them in real time. They were made
> aware of this limitation months ago, so it should not come as a surprise:
> https://phabricator.wikimedia.org/T127164 The users's databases are
> documented at:
> https://phabricator.wikimedia.org/diffusion/OPUP/browse/production/templates/mariadb/tools.my.cnf.erb;f21ce599fe626e7c96010a5d0335370ebe510ca7$65
> * Data will be copied away, server will be reimaged, then data will be
> copied back That normally takes 3 hours, but things could go wrong...
> * People could complain for a 10.0 upgrade (?). But some people actually
> complained already for the lack of 5.5 -> 10 upgrade.
> https://phabricator.wikimedia.org/T138517#2796682
> * On switch-back, again bad-programmed application may temporarily fail, but
> good ones should just switch transparently; unavailable dbs should be
> available again
>
> That should be enough background to schedule and send an email to users :-)
>
> ---------- Forwarded message ----------
> From: Yuvi Panda <yuvipanda at gmail.com>
> Date: Mon, Jan 30, 2017 at 7:14 PM
> Subject: [Labs-admin] Report from ops meeting
> To: Labs admin list for infrastructure and discussion
> <labs-admin at lists.wikimedia.org>
>
>
> 1. Faidon talking about ip space discussions wrt asia dc discussion,
> and mentioned we might / should renumber labs IP space. Not sure about
> more details.
> 2. Ping on labsdb migration to Jessie
> 3. Mid-year review of annual goals coming up, need status about OGE
> migration
>
> That's it.
>
> --
> Yuvi Panda T
> http://yuvi.in/blog
>
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>
>
> --
> Jaime Crespo
> <http://wikimedia.org>
>
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-- 
Yuvi Panda T
http://yuvi.in/blog