[ClusterLabs] Filesystem support for Lustre filesystem client mounts

Dejan Muhamedagic dejanmm at fastmail.fm
Mon May 18 10:21:49 EDT 2015

On Mon, May 18, 2015 at 08:13:07AM -0400, Ron Kerry wrote:
> On 5/18/15 5:07 AM, users-request at clusterlabs.org wrote:
> >Hi,
> >
> >On Sat, May 16, 2015 at 09:46:33AM -0400, Ron Kerry wrote:
> >>>The Filesystem RA included with SLES11 SP3 HAE does not support
> >>>Lustre filesystem client mounts because the device specification
> >>>(e.g. at tcp:/lustrefs) is not handled.
> >Please be more specific.
> The Lustre client mount device is NOT a block device. There is no
> code (like for an NFS client mount) that handles this exception.

I suppose that you mean in code like this:

275     # Get the current real device name, if possible.
276     # (specified devname could be -L or -U...)
277     case "$FSTYPE" in
278     nfs4|nfs|smbfs|cifs|glusterfs|ceph|tmpfs|overlayfs|none)
279         : ;;

We can add "lustre" to various lists of this kind.

> >>>Is this something
> >>>that has been added in the community code, or is this something that
> >>>has yet to be contributed?  Does anyone have another way to handle
> >>>Lustre filesystem client mounts?
> >There were no changes pertaining to lustre and I can vaguely
> >recall people using it. I guess that if you do a ML search  (not
> >this one, but Linux HA or pacemaker) you should find some traces.
> There is support for Lustre server (MDS, OSS) mounts because in that
> case the device is a block device.

I'm not sure I follow. Sorry, no lustre expert here.

> The trouble stems from the fact
> that the fileysstem type "lustre" is overloaded for both server side
> and client side mount purposes.

ocf:heartbeat:Filesystem is essentially mount/umount, so, if we
agree on the terminology, it is always client-side.

> >
> >Thanks,
> >
> >Dejan
> >
> -- 
> Ron Kerry         rkerry at sgi.com
> Global Product Support - SGI Federal
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