[lustre-discuss] zfs after upgrade

[Alastair Basden]

Hi all,

Problem solved - the lustre zfs dkms wasn't building due to a bug in 
/usr/src/lustre-zfs-2.16.1/dkms.conf
pointing to 3 of the wrong directories.

We've done a pull request in the lustre-release github.

Cheers,
Alastair.

On Fri, 17 Jan 2025, Alastair Basden wrote:

> [EXTERNAL EMAIL]
>
> Hi all,
>
> We are upgrading lustre servers from 2.12 to 2.16 (Rocky9).
>
> The OSTs are zfs. (2.1.15)
>
> The zpools are imported fine, with the warning that a zpool upgrade is
> necessary for all features to become available.  We haven't done this yet,
> as it removed backwards compatibility.
>
> To mount the OSTs, we do what we've always done, e.t.c
> mount -t lustre tank1/ost1 /mnt/lustre/ost1
>
> Upon trying to mount the OSTs, we get:
> mount.lustre: tank1/ost1 has not been formatted with mkfs.lustre or the 
> backend filesystem type is not supported by this tool
>
> Has anyone tried this Lustre upgrade with zfs?  Is it known to work?
>
> Is the solution to do a zpool upgrade?
>
> Cheers,
> Alastair.
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