You can update the server with the mapped rbd and shouldn't see as much as
a blip on your VMs.

On Tue, Sep 26, 2017, 3:32 AM Götz Reinicke <goetz.reini...@filmakademie.de>
wrote:

> Hi Thanks David & David,
>
> we don’t use the fuse code. And may be I was a bit unclear, but your
> feedback clears some other aspects in that context.
>
> I did an update already on our OSD/MONs while a NFS Fileserver still had a
> rbd connected and was exporting files (Virtual disks for XEN server) online.
>
> Now the question is, can I update the ceph packages on the NFS Fileserver
> while the export (and VM Images) are online? Or should I shutdown the VMs
> and unmount the NFS export …?
>
> Lots of nuts and bolts, but I like to screw …. :)
>
> Cheers . Götz
>
>
> Am 25.09.2017 um 17:05 schrieb David Turner <drakonst...@gmail.com>:
>
> It depends a bit on how you have the RBDs mapped.  If you're mapping them
> using krbd, then they don't need to be updated to use the new rbd-fuse or
> rbd-nbd code.  If you're using one of the latter, then you should schedule
> a time to restart the mounts so that they're mapped with the new Ceph
> version.
>
> In general RBDs are not affected by upgrades as long as you don't take
> down too much of the cluster at once and are properly doing a rolling
> upgrade.
>
> On Mon, Sep 25, 2017 at 8:07 AM David <dclistsli...@gmail.com> wrote:
>
>> Hi Götz
>>
>> If you did a rolling upgrade, RBD clients shouldn't have experienced
>> interrupted IO and therefor IO to NFS exports shouldn't have been affected.
>> However, in the past when using kernel NFS over kernel RBD, I did have some
>> lockups when OSDs went down in the cluster so that's something to watch out
>> for.
>>
>>
>> On Mon, Sep 25, 2017 at 8:38 AM, Götz Reinicke <
>> goetz.reini...@filmakademie.de> wrote:
>>
>>> Hi,
>>>
>>> I updated our ceph OSD/MON Nodes from 10.2.7 to 10.2.9 and everything
>>> looks good so far.
>>>
>>> Now I was wondering (as I may have forgotten how this works) what will
>>> happen to a  NFS server which has the nfs shares on a ceph rbd ? Will the
>>> update interrupt any access to the NFS share or is it that smooth that e.g.
>>> clients accessing the NFS share will not notice?
>>>
>>> Thanks for some lecture on managing ceph and regards . Götz
>>
>>
> <…>
>
>
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