Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Thanks, Dave! Your HA post explains a lot. I've integrated your patch on my test systems and it does appear to work perfectly - it's much cleaner than my hack and allows me to keep my nfs-mounted home directory logins active during the failover. Good luck on patching fuser. - Patrick ________________________________ PATRICK K. JAROMIN VP Technology 574.234-2211 . fax: 312.943.9675 JGSullivan Interactive, Inc. http://JGSullivan.com > -----Original Message----- > From: drbd-user-bounces at linbit.com [mailto:drbd-user-bounces at linbit.com] > On Behalf Of Dave Dykstra > Sent: Friday, March 04, 2005 2:16 PM > To: drbd-user at linbit.com > Subject: Re: [DRBD-user] HA-NFS & drbd > > On Fri, Mar 04, 2005 at 11:35:41AM -0600, Patrick Jaromin wrote: > > We're running an HA-NFS setup where the clustered servers are also NFS > > clients of themselves. > > > > Initially, I was having a problem where the failover would hang up on > the > > 'fuser' call in the Filesystem script. It would typically work if I > > commented this call out, however, occasionally this would result in a > > botched failover. This would happen if there were any processes running > on > > the mount point -- and since we're mounting the user home directories, > > anyone logged into their account could cause hb_standby to fail. > > > > Ultimately, I believe I've fixed the issue by issuing (via a custom > > resource.d script) a 'fuser -mk /nfs-mount-point' just before stopping > the > > nfs server. This works for us since we use the NFS mount points as data > > directories - no critical server processes are run from them. > > > > So far this has worked flawlessly for us...although I've only been using > > DRBD for a couple weeks now, so I'd be interested in hearing if anyone > > thinks this might be a bad idea. > > > > - Patrick > > > That sounds like a good compromise. It still defeats some of my purpose, > which is to allow programs on the file server to continue during a > failover, but at least it would allow us to have access to our home > directories on the standby server. > > There was a recent discussion about the fuser hang on the linux-ha > mailing list. It's caused by fuser following symbolic links in /proc > that point to the files related to open file descriptors. > My solution to that is at > http://lists.community.tummy.com/pipermail/linux-ha/2005- > February/013895.html > > - Dave > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user