[Buildroot] [Hosting] Primary Prod Ganeti Cluster Hardware Migration & Upgrade - Jul 8-12, 2013 (Time Varies)

Peter Korsgaard jacmet at sunsite.dk
Sat Jul 6 08:35:28 UTC 2013


>>>>> "Lance" == Lance Albertson <lance at osuosl.org> writes:

FYI,

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> cluster:

 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> Lance Albertson
 Lance> Director
 Lance> Oregon State University | Open Source Lab 

-- 
Bye, Peter Korsgaard


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