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 <BKrishna@xxxxxxxxxxxxxxx> 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-bounces@lists.ceph.com > on behalf of Gaurav Goyal <er.gauravgoyal@xxxxxxxxx>
Date: Thursday, August 4, 2016 at 8:19 AM
To: David Turner <david.turner@xxxxxxxxxxxxxxxx>
Cc: ceph-users <ceph-users@xxxxxxxxxxxxxx>
Subject: Re: 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.gauravgoyal@xxxxxxxxx<mailto:er.gauravgoyal@gmail. On 03-Aug-2016 4:59 pm, "David Turner" <david.turner@xxxxxxxxxxxxxxxxcom >> 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
<mailto:david.turner@ [cid:image001.jpg@01D1EE42.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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