On Wed, Dec 5, 2018 at 3:48 PM Ashley Merrick <singapore@xxxxxxxxxxxxxx> wrote:
>
> I have had some ec backed Mimic RBD's mounted via the kernel module on a Ubuntu 14.04 VM, these have been running no issues after updating the kernel to 4.12 to support EC features.
>
> Today I run an apt dist-upgrade which upgraded from 12.2.9 to 12.2.10, since then I have been getting the following line in the syslog and had to role back to using rbd-nbd for the moment which continues to work fine.
Hi Ashley,
Are you sure that the release you upgraded from was 12.2.9?
What upgrade procedure did you follow?
>
> Not sure if there is a change in 12.2.10 that this is expected with a non mimic kernel client such as Luminous.
>
> Error in VM syslog:
>
> feature set mismatch, my 40107b86a842ada < server's 60107b86aa42ada, missing 200000000200000
> libceph: mon2 176.9.86.219:6789 missing required protocol features
These are standard luminous feature bits. It looks like your cluster
didn't require them before the upgrade and now it does. 12.2.10 should
continue to work 4.12 and any older kernel, as long as nothing luminous
only is enabled.
What is the output of "ceph osd get-require-min-compat-client"?
Thanks,
Ilya
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