Hello

I need your help to redesign my ceph storage network.

As suggested in earlier discussions, i must not use SAN storage. So we have
decided to removed it.

Now we are ordering Local HDDs.

My Network would be

Host1 --> Controller + COmpute --> Local Disk 600GB Host 2--> Compute2 -->
Local Disk 600GB Host 3 --> Compute2

Is it right setup for ceph network? For Host1 and Host2 , we are using 1
600GB disk for basic filesystem.

Should we use same size storage disks for ceph environment or i can order
Disks in size of 2TB for ceph cluster?

Making it

2T X 2 on Host1 2T X 2 on Host 2 2T X 2 on Host 3

12TB in total. replication factor 2 should make it 6 TB?


Regards

Gaurav Goyal

On Thu, Aug 4, 2016 at 1:52 AM, Bharath Krishna <bkris...@walmartlabs.com>
wrote:

> Hi Gaurav,
>
> There are several ways to do it depending on how you deployed your ceph
> cluster. Easiest way to do it is using ceph-ansible with purge-cluster yaml
> ready made to wipe off CEPH.
>
> https://github.com/ceph/ceph-ansible/blob/master/purge-cluster.yml
>
> You may need to configure ansible inventory with ceph hosts.
>
> Else if you want to purge manually, you can do it using:
> http://docs.ceph.com/docs/hammer/rados/deployment/ceph-deploy-purge/
>
>
> Thanks
> Bharath
>
> From: ceph-users <ceph-users-boun...@lists.ceph.com> on behalf of Gaurav
> Goyal <er.gauravgo...@gmail.com>
> Date: Thursday, August 4, 2016 at 8:19 AM
> To: David Turner <david.tur...@storagecraft.com>
> Cc: ceph-users <ceph-users@lists.ceph.com>
> Subject: Re: [ceph-users] Fwd: Ceph Storage Migration from SAN storage to
> Local Disks
>
> Please suggest a procedure for this uninstallation process?
>
>
> Regards
> Gaurav Goyal
>
> On Wed, Aug 3, 2016 at 5:58 PM, Gaurav Goyal <er.gauravgo...@gmail.com<
> mailto:er.gauravgo...@gmail.com>> wrote:
>
> Thanks for your  prompt
> response!
>
> Situation is bit different now. Customer want us to remove the ceph
> storage configuration from scratch. Let is openstack system work without
> ceph. Later on install ceph with local disks.
>
> So I need to know a procedure to uninstall ceph and unconfigure it from
> openstack.
>
> Regards
> Gaurav Goyal
> On 03-Aug-2016 4:59 pm, "David Turner" <david.tur...@storagecraft.com
> <mailto:david.tur...@storagecraft.com>> wrote:
> If I'm understanding your question correctly that you're asking how to
> actually remove the SAN osds from ceph, then it doesn't matter what is
> using the storage (ie openstack, cephfs, krbd, etc) as the steps are the
> same.
>
> I'm going to assume that you've already added the new storage/osds to the
> cluster, weighted the SAN osds to 0.0 and that the backfilling has
> finished.  If that is true, then your disk used space on the SAN's should
> be basically empty while the new osds on the local disks should have a fair
> amount of data.  If that is the case, then for every SAN osd, you just run
> the following commands replacing OSD_ID with the osd's id:
>
> # On the server with the osd being removed
> sudo stop ceph-osd id=OSD_ID
> ceph osd down OSD_ID
> ceph osd out OSD_ID
> ceph osd crush remove osd.OSD_ID
> ceph auth del osd.OSD_ID
> ceph osd rm OSD_ID
>
> Test running those commands on a test osd and if you had set the weight of
> the osd to 0.0 previously and if the backfilling had finished, then what
> you should see is that your cluster has 1 less osd than it used to, and no
> pgs should be backfilling.
>
> HOWEVER, if my assumptions above are incorrect, please provide the output
> of the following commands and try to clarify your question.
>
> ceph status
> ceph osd tree
>
> I hope this helps.
>
> > Hello David,
> >
> > Can you help me with steps/Procedure to uninstall Ceph storage from
> openstack environment?
> >
> >
> > Regards
> > Gaurav Goyal
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