On Feb 12, 2016 10:50 PM, "Kaushal M" <[email protected]> wrote: > > On Fri, Feb 12, 2016 at 10:47 PM, Michael Scherer <[email protected]> wrote: > > Le vendredi 12 février 2016 à 12:16 +0100, Michael Scherer a écrit : > >> Le mercredi 10 février 2016 à 19:18 +0530, Kaushal M a écrit : > >> > On Wed, Feb 10, 2016 at 1:53 PM, Michael Scherer <[email protected]> wrote: > >> > > Le mercredi 10 février 2016 à 11:44 +0530, Kaushal M a écrit : > >> > >> On Sun, Feb 7, 2016 at 2:34 PM, Michael Scherer < [email protected]> wrote: > >> > >> > Le samedi 06 février 2016 à 18:17 -0500, Vijay Bellur a écrit : > >> > >> >> I think starting around 0900 UTC on Friday of next week (12th Feb) > >> > >> >> should be possible. We should be done with 3.7.8 before that and can > >> > >> >> afford a bit of downtime then. In case any assistance is needed post the > >> > >> >> migration, we can have folks around the clock to help. > >> > >> >> > >> > >> >> If migration fails for an unforeseen reason, would we be able to > >> > >> >> rollback and maintain status quo? > >> > >> > > >> > >> > Yes. Worst case, I think people would just redo a few reviews or push > >> > >> > again patch. > >> > >> > > >> > >> > Also, since gerrit is critical, I wonder what is the support of gerrit > >> > >> > for slaves and replication. > >> > >> > >> > >> Michael are you okay with the time? If you are, I think we should > >> > >> announce the migration. > >> > > > >> > > I am ok. > >> > > >> > So as discussed in the community meeting, we will be announcing the > >> > migration and downtime. Vijay, you said you required the exact > >> > schedule? This is what I expect > >> > > >> > Friday 12th Feb 2016 > >> > > >> > 0900 UTC : build.gluster.org and review.gluster.org are taken down and > >> > migration begins. > >> > <1-2 hrs?>: Michael copies over data onto the RH community infra and > >> > sets up the VMs. > >> > <? hrs>: The DNS records are updated, and some time is for it to propogate. > >> > <3hr?>: Verify everything is working well (I can help with this). We'd > >> > possibly need to run a regression job, so this will take longest I > >> > think. > >> > > >> > 1700UTC <or earlier>: We announce the finish of the migration and open > >> > the services back up. If migration failed, we bring the existing > >> > servers back on, and continue on. > >> > >> So, for people wanting to know, the migration has started. > >> > >> 1) gerrit > >> ---------- > >> gerrit seems to be ok, it has a new IP 66.187.224.201 > >> > >> people who used to have access there need to contact me so I can > >> explain/create required account on the new virt host. > >> > >> the old VM is shutdown for now. I will make a backup copy of the disk. > >> > >> 2) jenkins > >> ---------- > >> > >> so the preparation of the migration didn't worked as well, so we have to > >> copy the VM when offline, and then prepare it later ( ie, import in > >> libvirt, adjust network, etc). So jenkins master is offline (sorry manu > >> for your tcpdump monitoring), we are making a copy of the disk that is > >> gonna take between 3 and 14h (most likely < 4h, but rsync estimation is > >> moving a lot), and then restart like before. > > > > So turn out I was wrong, and the copy is taking a much longer time. > > Despites me trying to investigate why, it didn't copied everything. > > > > So the new plan is to stop the VM, make a local copy of the disk, start > > the VM, and then copy that one over the new server, prepare for the new > > host (firewall, public ip, etc), and sync from the old VM to the new > > host. > > > > All is ok with this plan ? > > Sounds good to me. No need to wait for the copy to happen and the > downtime should be minimal like with gerrit. >
Can we schedule this minimal downtime sometime tomorrow? Or if possible tonight itself. Since we don't require a long downtime we can do this anytime we like. I'd like to get the migration done by the end of this week (if possible) before Michael goes on vacation. > > -- > > Michael Scherer > > Sysadmin, Community Infrastructure and Platform, OSAS > > > >
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