[Buildroot] [Hosting] Primary Prod Ganeti Cluster Hardware Migration & Upgrade - Jul 8-12, 2013 (Time Varies)
jacmet at sunsite.dk
Sat Jul 6 08:35:28 UTC 2013
>>>>> "Lance" == Lance Albertson <lance at osuosl.org> writes:
Website and git will also see some downtime next week.
Lance> Service(s) affected: All VMs hosted on our primary production
Lance> Ganeti cluster We will be performing three tasks on the prod
Lance> 1. Migration to newer hardware
Lance> 2. Switching Node OS to CentOS 6
Lance> 3. Upgrading Ganeti to 2.6.2
Lance> Outage Window:
Lance> Start: Mon, Jul 8, 9:00AM PDT (Mon Jul 8 1600 UTC)
Lance> End: Fri, Jul 12, 5:00PM PDT (Sat Jul 13 0000 UTC)
Lance> Special Note: The actual outage windows will generally happen
Lance> during our normal business hours to ensure we get the most
Lance> productive outcome. If you wish to have your VM migration to
Lance> happen at a specific time, we can certainly do that even outside
Lance> of this scheduled window. Please email me directly for that.
Lance> I will send another email on the day of the migration with
Lance> details on what hosts will be impacted that day and continue to
Lance> send updates as the week progresses. We could in theory get this
Lance> completed within a few days but we're doing a week long window
Lance> just in case.
Lance> Reason for outage:
Lance> We are finally retiring some of the original Ganeti hardware in
Lance> and moving to newer hardware which will expand our capacity
Lance> quite a bit. We'll go from a 5-node cluster to a 6-node cluster
Lance> with about 2-3 times more capacity.
Lance> In addition we're going to switch the primary OS on all the
Lance> nodes from Gentoo to CentOS 6 to offer better stability and
Lance> lower staff time maintaining the OS. Lastly we're finally going
Lance> to upgrade to Ganeti 2.6.2 which will happen first.
Lance> Projects affected: All VMs hosted on the prod cluster will
Lance> experience a short down time at some point. Unfortunately we
Lance> will not be able to do a live migration of the VMs since we're
Lance> going between different versions of KVM. This means that we will
Lance> gracefully shutdown a VM and fail it over to the newer hardware
Lance> and start it back up.
Lance> Please let me know ASAP if you need a specific time setup for
Lance> your migration.
Lance> Thank you!
Lance> Lance Albertson
Lance> Oregon State University | Open Source Lab
Bye, Peter Korsgaard
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