[ovirt-users] Ovirt & Ceph

Sun Dec 18 17:22:43 UTC 2016

Alessandro,

Right now I dont have cinder running in my setup in case if ceph don't work
then I have get one vm running open stack all in one and have all these
disk connect my open stack using cinder I can present storage to my ovirt.

At the same time I not getting case study for the same.

Regards
Rajat

Hi

Regards,
Rajat Patel

http://studyhat.blogspot.com
FIRST THEY IGNORE YOU...
THEN THEY LAUGH AT YOU...
THEN THEY FIGHT YOU...
THEN YOU WIN...

On Sun, Dec 18, 2016 at 9:17 PM, Alessandro De Salvo <
Alessandro.DeSalvo at roma1.infn.it> wrote:

> Hi,
> oh, so you have only 2 physical servers? I've understood they were 3!
> Well, in this case ceph would not work very well, too few resources and
> redundancy. You could try a replica 2, but it's not safe. Having a replica
> 3 could be forced, but you would end up with a server with 2 replicas,
> which is dangerous/useless.
> Okay, so you use nfs as storage domain, but in your setup the HA is not
> guaranteed: if a physical machine goes down and it's the one where the
> storage domain resides you are lost. Why not using gluster instead of nfs
> for the ovirt disks? You can still reserve a small gluster space for the
> non-ceph machines (for example a cinder VM) and ceph for the rest. Where do
> you have your cinder running?
> Cheers,
>
>     Alessandro
>
> Il giorno 18 dic 2016, alle ore 18:05, rajatjpatel <rajatjpatel at gmail.com>
> ha scritto:
>
> Hi Alessandro,
>
> Right now I have 2 physical server where I have host ovirt these are HP
> proliant dl 380  each server 1*500GB SAS & 1TB *4 SAS Disk and 1*500GB SSD.
> So right now I have use only one disk which 500GB of SAS for my ovirt to
> run on both server. rest are not in use. At present I am using NFS which
> coming from mapper to ovirt as storage, go forward we like to use all these
> disk as  hyper-converged for ovirt. RH I could see there is KB for using
> gluster. But we are looking for Ceph bcoz best pref romance and scale.
>
> <Screenshot from 2016-12-18 21-03-21.png>
> Regards
> Rajat
>
> Hi
>
>
> Regards,
> Rajat Patel
>
> http://studyhat.blogspot.com
> FIRST THEY IGNORE YOU...
> THEN THEY LAUGH AT YOU...
> THEN THEY FIGHT YOU...
> THEN YOU WIN...
>
>
> On Sun, Dec 18, 2016 at 8:49 PM, Alessandro De Salvo <
> Alessandro.DeSalvo at roma1.infn.it> wrote:
>
>> Hi Rajat,
>> sorry but I do not really have a clear picture of your actual setup, can
>> you please explain a bit more?
>> In particular:
>>
>> 1) what to you mean by using 4TB for ovirt? In which machines and how do
>> you make it available to ovirt?
>>
>> 2) how do you plan to use ceph with ovirt?
>>
>> I guess we can give more help if you clarify those points.
>> Thanks,
>>
>>    Alessandro
>>
>> Il giorno 18 dic 2016, alle ore 17:33, rajatjpatel <rajatjpatel at gmail.com>
>> ha scritto:
>>
>> Great, thanks! Alessandro ++ Yaniv ++
>>
>> What I want to use around 4 TB of SAS disk for my Ovirt (which going to
>> be RHV4.0.5 once POC get 100% successful, in fact all product will be RH )
>>
>> I had done so much duckduckgo for all these solution and use lot of
>> reference from ovirt.org & access.redhat.com for setting up a Ovirt
>> engine and hyp.
>>
>> We dont mind having more guest running and creating ceph block storage
>> and which will be presented to ovirt as storage. Gluster is not is use
>> right now bcoz we have DB will be running on guest.
>>
>> Regard
>> Rajat
>>
>> On Sun, Dec 18, 2016 at 8:21 PM Alessandro De Salvo <
>> Alessandro.DeSalvo at roma1.infn.it> wrote:
>>
>>> Hi,
>>> having a 3-node ceph cluster is the bare minimum you can have to make it
>>> working, unless you want to have just a replica-2 mode, which is not safe.
>>> It's not true that ceph is not easy to configure, you might use very
>>> easily ceph-deploy, have puppet configuring it or even run it in
>>> containers. Using docker is in fact the easiest solution, it really
>>> requires 10 minutes to make a cluster up. I've tried it both with jewel
>>> (official containers) and kraken (custom containers), and it works pretty
>>> well.
>>> The real problem is not creating and configuring a ceph cluster, but
>>> using it from ovirt, as it requires cinder, i.e. a minimal setup of
>>> openstack. We have it and it's working pretty well, but it requires some
>>> work. For your reference we have cinder running on an ovirt VM using
>>> gluster.
>>> Cheers,
>>>
>>>    Alessandro
>>>
>>> Il giorno 18 dic 2016, alle ore 17:07, Yaniv Kaul <ykaul at redhat.com> ha
>>> scritto:
>>>
>>>
>>>
>>> On Sun, Dec 18, 2016 at 3:29 PM, rajatjpatel <rajatjpatel at gmail.com>
>>> wrote:
>>>
>>> Dear Team,
>>>
>>> We are using Ovirt 4.0 for POC what we are doing I want to check with
>>> all Guru's Ovirt.
>>>
>>> We have 2 hp proliant dl 380 with 500GB SAS & 1TB *4 SAS Disk and 500GB
>>> SSD.
>>>
>>> Waht we are done we have install ovirt hyp on these h/w and we have
>>> physical server where we are running our manager for ovirt. For ovirt hyp
>>> we are using only one 500GB of one HDD rest we have kept for ceph, so we
>>> have 3 node as guest running on ovirt and for ceph. My question you all is
>>> what I am doing is right or wrong.
>>>
>>>
>>> I think Ceph requires a lot more resources than above. It's also a bit
>>> more challenging to configure. I would highly recommend a 3-node cluster
>>> with Gluster.
>>> Y.
>>>
>>>
>>>
>>> Regards
>>> Rajat
>>>
>>>
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>>> --
>>
>> Sent from my Cell Phone - excuse the typos & auto incorrect
>>
>>
>
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