Lars Marowsky-Bree a écrit :
On 2008-06-09T16:25:25, Florent DUTHEIL <[EMAIL PROTECTED]> wrote:
One can see clearly in logs (when it comes to mount the first "bind/ro"
ressource:
Filesystem[2688][2718]: 2008/06/09_16:10:08 INFO: Running start for
/mnt/filer1/drivers on /var/ftp/labtech/labtech_drivers
Filesystem[2688][2719]: 2008/06/09_16:10:08 ERROR: DANGER! on
/mnt/filer1/drivers is NOT cluster-aware!
Filesystem[2688][2720]: 2008/06/09_16:10:08 ERROR: DO NOT RUN IT AS A
CLONE!
Filesystem[2688][2721]: 2008/06/09_16:10:08 ERROR: Politely refusing to
proceed to avoid data corruption.
Well, I think that's fairly explicit. ;-) It tries to guard against
errors - such as users accidentially trying to clone an ext3 mount.
Do I havet to "hack" the FS agent code to make him ignore every FS
ressources that have the "bind" option?
I suppose I would have to modify this statement:
[snip]
Yes, you'll need to detect bind mounts here and permit them.
In my view, cloned "binded" FS ressources (let call it the "B" FS
ressource) should always be allowed. Because the original FS ressource
(let call it the "A" FS ressource) that is re-mounted as binded is
already protected against unauthorized FS resource cloning.
For example, in the case of an ext3 ressource (A), this ext3 FS won't be
cloned (FS agent protection) so there won't be any HB/cluster breakage
problem if the cloned "binded" remonted FS ressource (B) is allowed.
Indeed B can always be mounted on a Linux system but simply won't show
files from A. It's up to the cluster designer to set constraints or
groups to make B be mounted only if A actually is.
If I'm not wrong, I really think that the FS agent protection against
cluster unaware FS should be disabled upstream for "binded" FS ressources.
Please feel free to argue and tell me if I'm wrong :)
Regards,
Florent.
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