Re: QEMU/KVM client compatibility

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Hi Wido,

thanks for your reply!

For CentOS 7, this means I can switch over to the "rpm-nautilus/el7" repository and Qemu uses a nautilus compatible client?
I just want to make sure, I understand correctly.

Thank you very much!

Kevin

Am Di., 28. Mai 2019 um 09:46 Uhr schrieb Wido den Hollander <wido@xxxxxxxx>:


On 5/28/19 7:52 AM, Kevin Olbrich wrote:
> Hi!
>
> How can I determine which client compatibility level (luminous, mimic,
> nautilus, etc.) is supported in Qemu/KVM?
> Does it depend on the version of ceph packages on the system? Or do I
> need a recent version Qemu/KVM?

This is mainly related to librados and librbd on your system. Qemu talks
to librbd which then talks to librados.

Qemu -> librbd -> librados -> Ceph cluster

So make sure you keep the librbd and librados packages updated on your
hypervisor.

When upgrading them make sure you either Stop/Start or Live Migrate the
VMs to a different hypervisor so the VMs are initiated with the new code.

Wido

> Which component defines, which client level will be supported?
>
> Thank you very much!
>
> Kind regards
> Kevin
>
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