[Linux-cluster] Re: Lazy umount - NFS HA

[Jordi Prats]

Hi,
fuser (or lsof) does not show any process because we export the
filesystem with NFS (NFS is inside the kernel)

Jordi

Jonathan Biggar wrote:
> Matthew Geier wrote:
>> Jordi Prats wrote:
>>> Hi all,
>>> It's normal that I must use a script to do a lazy umount (umount -l
>>> /mountpoint) of a ext3 partition (not GFS) in a HA NFS cluster?
>>
>>  I'm having the same problem - the service won't shutdown cleanly as
>> it can't unmount the file systems - which it can't unmount due to some
>> one logging in with SSH and their home directory is on that volume.
> 
> I don't think using umount -l is going to do what you want.  It means
> that the kernel will continue to write to the filesystem for an
> arbitrary amount of time after the umount completes, which *will* cause
> havok if another node mounts that ext3 partition.
> 
> We got around this by writing a custom script that uses fuser to
> identify and kill all processes that had open files on the filesystem.
> 

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