[LUDOC-131] ACLs and extended attributes not preserved on MDS move

• Status: Resolved
• Project: Lustre Documentation
• Type: Bug
• Priority: Minor
• Reporter: Christopher J. Walker (Inactive)
• Assignee: Lustre Manual Triage
• Resolution: Cannot Reproduce

Environment

Lustre 1.8.8-wc1 moving to Lustre 1.8.9-wc1

• Severity: 3

Description

On 23/03/13 15:59, Christopher J. Walker wrote:
> I have moved the metadata server on a lustre 1.8 filesystem (previously
> upgraded from 1.6) to new hardware.
>
> The posix acls and extended user attributes don't seem to have been
> preserved.
>
[snip]
>
> What I did was:
>
> # On old server
> mount -t ldiskfs /dev/sdb /mnt/mgs

The problem is the following:

Although that's what is documented in the Lustre 1.8 manual, it seems I should have done is:

mount -t ldiskfs -o user_xattr -o acl /dev/sdb /mnt/mgs

to preserve the extended attributes and acls.

> cd /mnt/mgs
> getfattr -R -d -m '.*' -P .

To get out of this, I've done the following on the old MDS

getfattr -R -d -P . >aclfile

and then setfattr --restore=aclfile

and similarly with the acls.

Chris

Comments

[Andreas Dilger]

All modern ext4/ldiskfs filesystems will mount with "-o user_xattr,acl" enabled by default, and these options have been removed from 3.3+ kernels so I don't think this is needed anymore.