Hello David,

Can you help me with steps/Procedure to uninstall Ceph storage from
openstack environment?


Regards
Gaurav Goyal

On Tue, Aug 2, 2016 at 11:57 AM, Gaurav Goyal <er.gauravgo...@gmail.com>
wrote:

> Hello David,
>
> Thanks a lot for detailed information!
>
> This is going to help me.
>
>
> Regards
> Gaurav Goyal
>
> On Tue, Aug 2, 2016 at 11:46 AM, David Turner <
> david.tur...@storagecraft.com> wrote:
>
>> I'm going to assume you know how to add and remove storage
>> http://docs.ceph.com/docs/hammer/rados/operations/add-or-rm-osds/.  The
>> only other part of this process is reweighting the crush map for the old
>> osds to a new weight of 0.0
>> http://docs.ceph.com/docs/master/rados/operations/crush-map/.
>>
>> I would recommend setting the nobackfill and norecover flags.
>>
>> ceph osd set nobackfill
>> ceph osd set norecover
>>
>> Next you would add all of the new osds according to the ceph docs and
>> then reweight the old osds to 0.0.
>>
>> ceph osd crush reweight osd.1 0.0
>>
>> Once you have all of that set, unset nobackfill and norecover.
>>
>> ceph osd unset nobackfill
>> ceph osd unset norecover
>>
>> Wait until all of the backfilling finishes and then remove the old SAN
>> osds as per the ceph docs.
>>
>>
>> There is a thread from this mailing list about the benefits of weighting
>> osds to 0.0 instead of just removing them.  The best thing that you gain
>> from doing it this way is that you can remove multiple nodes/osds at the
>> same time without having degraded objects and especially without losing
>> objects.
>>
>> ------------------------------
>>
>> <https://storagecraft.com> David Turner | Cloud Operations Engineer | 
>> StorageCraft
>> Technology Corporation <https://storagecraft.com>
>> 380 Data Drive Suite 300 | Draper | Utah | 84020
>> Office: 801.871.2760 | Mobile: 385.224.2943
>>
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