[Linux-cluster] ha-lvm

[Corey Kovacs]

You are certainly correct. I neglected to mention that I'd also  
checked for logged in users as well and there were none. Thank for  
this anyway, I appretiate the feedback.

Corey

Sent from my iPod

On Nov 3, 2010, at 2:15 AM, "Jankowski, Chris"  
<Chris.Jankowski at hp.com> wrote:

> Corey,
>
> I vaguely remember from my work on UNIX clusters many years ago that  
> if /dir is the mount point of a mounted filesystem then cd /dir or  
> into any directory below /dir from an interactive shell will prevent  
> an unmount of the filesystem i.e. umount /dir will fail.  I believe  
> that this restriction is because it will create an inconsistency in  
> the state of the shell process. lsof will not show it.
>
> Of course most users after login end up in the home directory by  
> default.
>
> I believe that Linux will have the same semantics as UNIX. You can  
> test that easily on a standalone Linux box.
>
> Regards,
>
> Chris Jankowski
>
>
> -----Original Message-----
> From: linux-cluster-bounces at redhat.com [mailto:linux-cluster- 
> bounces at redhat.com] On Behalf Of Corey Kovacs
> Sent: Wednesday, 3 November 2010 07:15
> To: linux clustering
> Subject: [Linux-cluster] ha-lvm
>
> Folks,
>
> I have a 5 node cluster backed by an FC SAN with 5 VG's each with a  
> single LVM.
>
> I am using ha_lvm and have lvm.conf configured to use tags as per  
> the instructions. Things work fine until I try to migrate the volume  
> containing our home dir (all others work as expected) The umount for  
> that volume fails and depending on the active config, the node  
> reboots itself (self_fence=1) or it simply fails and get's disabled.
>
> lsof doesn't reveal anything "holding" onto that mount point yet the  
> umount fails consistently (force_umount is enabled)
>
> Furthermore, it appears I have at least one ov my VG's with bad  
> tags, is there a way to show what tags a VG has?
>
> I've gone over the config several times and although I cannot show  
> the config, here is a basic rundown in case something jumps out...
>
> 5 nodes, dl360g5 2xQcore w/16GB ram
> EVA8100
> 2x4GB FC, multipath
> 5VG's each w/a single lv each with an ext3 fs.
> ha lvm in is use as a measure of protection for the ext3 fs's local  
> locking only via lvm.conf tags enabled via lvm.conf initrd's are  
> newer than the lvm.conf changes.
>
> I did notice that the ext3 label in use on the home volume was not  
> of the form /home (it was /ha_home) from early testing but I've  
> corrected that and the umount fail still occurs.
>
> If anyone has any ideas I'd appreciate it.
>
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