[osuosl-openpower] MAINTENANCE: OpenStack cluster server moves: Mar 8, 9 & 12
Lance Albertson
lance at osuosl.org
Fri Mar 9 23:18:33 UTC 2018
The move for openpower5 has been completed. Please let me know if any VMs
are still unreachable.
On Fri, Mar 9, 2018 at 10:03 AM, Lance Albertson <lance at osuosl.org> wrote:
> The move for openpower3 has been completed. Please let me know if any VMs
> are still unreachable.
>
>
> On Thu, Mar 8, 2018 at 5:25 PM, Lance Albertson <lance at osuosl.org> wrote:
>
>> The move for openpower2 has been completed. Sorry it took a little longer
>> than planned. Please let me know if any VMs are still unreachable.
>>
>> On Thu, Mar 8, 2018 at 11:15 AM, Lance Albertson <lance at osuosl.org>
>> wrote:
>>
>>> The move for openpower1 has been completed and all VMs should be booting
>>> up or already should be back online that were on that hypervisor. Please
>>> let us know if you have an issue with one of your VMs. We'll be moving
>>> openpower2 later this afternoon as planned.
>>>
>>> Thanks-
>>>
>>> On Tue, Mar 6, 2018 at 2:36 PM, Lance Albertson <lance at osuosl.org>
>>> wrote:
>>>
>>>> Service(s) affected:
>>>>
>>>> All VMs hosted on the OpenPOWER OpenStack cluster will be offline for
>>>> approximately 2-4 hours during each server move. In addition, any VMs which
>>>> have block storage attached to the affected nodes will have an outage.
>>>>
>>>> For a list of affected VMs per hypervisor node, please see the
>>>> following spreadsheet which includes the UUID for each instance as it
>>>> stands today. You can see what UUID your VM has by looking at the
>>>> /run/cloud-init/.instance-id file on your vm. In addition, if you're using
>>>> a block storage (cinder) volume, I have a sheet which shows the mappings by
>>>> UUID to the host.
>>>>
>>>> OpenStack Cluster Server Moves
>>>> <https://docs.google.com/a/osuosl.org/spreadsheets/d/15D3VE13chSn0jmGWpf5wsPsin6ex0B3I6FTwS74T5uY/edit?usp=drive_web>
>>>>
>>>> Outage Window
>>>> s
>>>> :
>>>>
>>>> openpower1
>>>> Start: Thu, Mar 8, 9:00AM PST (Thu Mar 8 1700 UTC)
>>>> End: Thu, Mar 8, 11:00AM PST (Thu Mar 8 1900 UTC)
>>>>
>>>> openpower2
>>>> Start: Thu, Mar 8, 3:00PM PST (Thu Mar 8 2300 UTC)
>>>> End: Thu, Mar 8, 5:00PM PST (Fri Mar 9 0100 UTC)
>>>>
>>>> openpower3
>>>> Start: Fri, Mar 9, 8:30AM PST (Fri Mar 9 1630 UTC)
>>>> End: Fri Mar 9, 10:30AM PST (Fri Mar 9 1830 UTC)
>>>>
>>>> openpower5
>>>> Start: Fri, Mar 9, 1:00PM PST (Fri Mar 9 2100 UTC)
>>>> End: Fri Mar 9, 3:00PM PST (Fri Mar 9 2300 UTC)
>>>>
>>>> openpower6 (note DST change for us)
>>>> Start: Mon, Mar 12, 1:00PM PDT (Fri Mar 9 2000 UTC)
>>>> End: Mon Mar 12, 3:00PM PDT (Fri Mar 9 2200 UTC)
>>>>
>>>> Reason for outage:
>>>>
>>>> We are in the process of migrating the storage backend of the cluster
>>>> from local storage to using Ceph as a backend. The migration to Ceph should
>>>> improve I/O bandwidth and capacity and also provide more flexibility with
>>>> doing server maintenance since we can do live migrations on VMs. Thanks to
>>>> a donation from IBM, we have a new five node Ceph cluster with 292TB of
>>>> capacity including SSD's for journal caching. In addition, we're going to
>>>> be upgrading the networking layer from 1Gbps to 40Gbps due to the use of
>>>> Ceph thanks to several donations from Mellanox. Since we're going to be
>>>> incurring an outage for the server move, we wanted to do a few other items
>>>> as the same time to reduce additional outage times.
>>>>
>>>> The first phase of this migration includes the following (which this
>>>> outage covers):
>>>>
>>>> 1. Moving each compute server to a different rack closer to a Mellanox
>>>> 40G switch
>>>> 2. Installing and configuring a Mellanox 40G NIC card
>>>> 3. Upgrading the system firmware (which includes Meltdown/Spectre fixes)
>>>> 4. Switching over to a 4.14 mainline kernel on the host to provide
>>>> better feature support on ppc64le (also provides fixes for Meltdown/Spectre)
>>>>
>>>> We have five compute nodes and we're planning on doing two sever moves
>>>> a day starting on Thursday of this week. We're going to need to bring the
>>>> nodes up and down several times so we'll be disabling the openstack
>>>> services on those nodes until the process is complete.
>>>>
>>>> The second phase of the migration will happen in a few weeks and should
>>>> only have per VM impacts while we migrate them over to the new Ceph
>>>> cluster. I'll send a separate announcement about that once we're ready for
>>>> that.
>>>>
>>>> If you have any questions or concerns please let me know directly via
>>>> email or IRC.
>>>>
>>>> Thanks!
>>>>
>>>> --
>>>> Lance Albertson
>>>> Director
>>>> Oregon State University | Open Source Lab
>>>>
>>>
>>>
>>>
>>> --
>>> Lance Albertson
>>> Director
>>> Oregon State University | Open Source Lab
>>>
>>
>>
>>
>> --
>> Lance Albertson
>> Director
>> Oregon State University | Open Source Lab
>>
>
>
>
> --
> Lance Albertson
> Director
> Oregon State University | Open Source Lab
>
--
Lance Albertson
Director
Oregon State University | Open Source Lab
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