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

[Yuvi Panda]

Actually I've just been told that Feb 14 is valentine's day and I
might be tasked with other duties on that day. Sorry! Feb 15?

On Mon, Jan 30, 2017 at 10:57 AM, Jaime Crespo <jcrespo at wikimedia.org> wrote:
> Ok to me.
>
> On Mon, Jan 30, 2017 at 7:54 PM, Yuvi Panda <yuvipanda at gmail.com> wrote:
>>
>> 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
>> >
>> > _______________________________________________
>> > Labs-admin mailing list
>> > Labs-admin at lists.wikimedia.org
>> > https://lists.wikimedia.org/mailman/listinfo/labs-admin
>> >
>> >
>> >
>> > --
>> > Jaime Crespo
>> > <http://wikimedia.org>
>> >
>> > _______________________________________________
>> > Labs-admin mailing list
>> > Labs-admin at lists.wikimedia.org
>> > https://lists.wikimedia.org/mailman/listinfo/labs-admin
>> >
>>
>>
>>
>> --
>> Yuvi Panda T
>> http://yuvi.in/blog
>>
>> _______________________________________________
>> Labs-admin mailing list
>> Labs-admin at lists.wikimedia.org
>> https://lists.wikimedia.org/mailman/listinfo/labs-admin
>
>
>
>
> --
> Jaime Crespo
> <http://wikimedia.org>



-- 
Yuvi Panda T
http://yuvi.in/blog