[Gluster-infra] Reboot policy for the infra

Nigel Babu nigelb at redhat.com
Thu Aug 23 05:51:53 UTC 2018

One more piece that's missing is when we'll restart the physical servers.
That seems to be entirely missing. The rest looks good to me and I'm happy
to add an item to next sprint to automate the node rebooting.

On Tue, Aug 21, 2018 at 9:56 PM Michael Scherer <mscherer at redhat.com> wrote:

> Hi,
> so that's kernel reboot time again, this time courtesy of Intel
> (again). I do not consider the issue to be "OMG the sky is falling",
> but enough to take time to streamline our process to reboot.
> Currently, we do not have a policy or anything, and I think the
> negociation time around that is cumbersome:
> - we need to reach people, which take time and add latency (would be
> bad if that was a urgent issue, and likely add undeed stress while
> waiting)
> - we need to keep track of what was supposed to be done, which is also
> cumbersome
> While that's not a problem if I had only gluster to deal with, my team
> of 3 do have to deal with a few more projects than 1, and orchestrating
> choice for a dozen of group is time consuming (just think last time you
> had to go to a restaurant after a conference to see how hard it is to
> reach agreements).
> So I would propose that we simplify that with the following policy:
> - Jenkins builder would be reboot by jenkins on a regular basis.
> I do not know how we can do that, but given that we have enough node to
> sustain builds, it shouldn't impact developpers in a big way. The only
> exception is the freebsd builder, since we only have 1 functionnal at
> the moment. But once the 2nd is working, it should be treated like the
> others.
> - service in HA (firewall, reverse proxy, internal squid/DNS) would be
> reboot during the day without notice. Due to working HA, that's non
> user impacting. In fact, that's already what I do.
> - service not in HA should be pushed for HA (gerrit might get there one
> day, no way for jenkins :/, need to see for postgres and so
> fstat/softserve, and maybe try to get something for
> download.gluster.org)
> - service critical and not in HA should be announced in advance.
> Critical mean the service listed here: https://gluster-infra-docs.readt
> hedocs.io/emergency.html
> - service non visible to end user (backup servers, ansible deployment
> etc) can be reboot at will
> Then the only question is what about stuff not in the previous
> category, like softserve, fstat.
> Also, all dependencies are as critical as the most critical service
> that depend on them. So hypervisors hosting gerrit/jenkins are critical
> (until we find a way to avoid outage), the ones for builders are not.
> Thoughts, ideas ?
> --
> Michael Scherer
> Sysadmin, Community Infrastructure and Platform, OSAS
> _______________________________________________
> Gluster-infra mailing list
> Gluster-infra at gluster.org
> https://lists.gluster.org/mailman/listinfo/gluster-infra

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