Beware about Ceph and oVirt Managed Block Storage, current integration is only 
possible with kernel, not with qemu-rbd.


k

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> On 18 Jan 2021, at 13:00, Shantur Rathore <rathor...@gmail.com> wrote:
> 
> 
> Thanks Strahil for your reply.
> 
> Sorry just to confirm,
> 
> 1. Are you saying Ceph on oVirt Node NG isn't possible?
> 2. Would you know which devs would be best to ask about the recent Ceph 
> changes?
> 
> Thanks,
> Shantur
> 
>> On Sun, Jan 17, 2021 at 4:46 PM Strahil Nikolov via Users <users@ovirt.org> 
>> wrote:
>> В 15:51 +0000 на 17.01.2021 (нд), Shantur Rathore написа:
>>> Hi Strahil,
>>> 
>>> Thanks for your reply, I have 16 nodes for now but more on the way.
>>> 
>>> The reason why Ceph appeals me over Gluster because of the following 
>>> reasons.
>>> 
>>> 1. I have more experience with Ceph than Gluster.
>> That is a good reason to pick CEPH.
>>> 2. I heard in Managed Block Storage presentation that it leverages storage 
>>> software to offload storage related tasks. 
>>> 3. Adding Gluster storage limits to 3 hosts at a time.
>> Only if you wish the nodes to be both Storage and Compute. Yet, you can add 
>> as many as you wish as a compute node (won't be part of Gluster) and later 
>> you can add them to the Gluster TSP (this requires 3 nodes at a time).
>>> 4. I read that there is a limit of maximum 12 hosts in Gluster setup. No 
>>> such limitation if I go via Ceph.
>> Actually , it's about Red Hat support for RHHI and not for Gluster + oVirt. 
>> As both oVirt and Gluster ,that are used, are upstream projects, support is 
>> on best effort from the community.
>>> In my initial testing I was able to enable Centos repositories in Node Ng 
>>> but if I remember correctly, there were some librbd versions present in 
>>> Node Ng which clashed with the version I was trying to install.
>>> Does Ceph hyperconverge still make sense?
>> Yes it is. You got the knowledge to run the CEPH part, yet consider talking 
>> with some of the devs on the list - as there were some changes recently in 
>> oVirt's support for CEPH.
>> 
>>> Regards
>>> Shantur
>>> 
>>>> On Sun, Jan 17, 2021, 9:58 AM Strahil Nikolov via Users <users@ovirt.org> 
>>>> wrote:
>>>> Hi Shantur,
>>>> 
>>>> the main question is how many nodes you have.
>>>> Ceph integration is still in development/experimental and it should be 
>>>> wise to consider Gluster also. It has a great integration and it's quite 
>>>> easy to work with).
>>>> 
>>>> 
>>>> There are users reporting using CEPH with their oVirt , but I can't tell 
>>>> how good it is.
>>>> I doubt that oVirt nodes come with CEPH components , so you most probably 
>>>> will need to use a full-blown distro. In general, using extra software on 
>>>> oVirt nodes is quite hard .
>>>> 
>>>> With such setup, you will need much more nodes than a Gluster setup due to 
>>>> CEPH's requirements.
>>>> 
>>>> Best Regards,
>>>> Strahil Nikolov
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> В неделя, 17 януари 2021 г., 10:37:57 Гринуич+2, Shantur Rathore 
>>>> <shantur.rath...@gmail.com> написа: 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Hi all,
>>>> 
>>>> I am planning my new oVirt cluster on Apple hosts. These hosts can only 
>>>> have one disk which I plan to partition and use for hyper converged setup. 
>>>> As this is my first oVirt cluster I need help in understanding few bits.
>>>> 
>>>> 1. Is Hyper converged setup possible with Ceph using cinderlib?
>>>> 2. Can this hyper converged setup be on oVirt Node Next hosts or only 
>>>> Centos?
>>>> 3. Can I install cinderlib on oVirt Node Next hosts?
>>>> 4. Are there any pit falls in such a setup?
>>>> 
>>>> 
>>>> Thanks for your help
>>>> 
>>>> Regards,
>>>> Shantur
>>>> 
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