I will give it a shot and let you know. BTW I have not tested with a local xenial VM, only remote google-cloud, so thats likely why you can’t reproduce the problem if you haven’t actually tried on google-cloud. I may see if I can find some time to setup with local (parallels) vms.
* * * I also wanted to isolate from ubuntu, but since there are no centos7 rpms for this I basically couldn’t _easily_ spin up that environment to see if maybe it was just something in the xenial google-cloud dist that was messing it up. FTR the only configuration I’ve been able to get working properly on google-cloud is on centos7 using drbd 8.4 (from elrepo.org). Though obviously this is 8.4 not 9.0 and lots has changed. —jason On July 19, 2016 at 2:35:30 AM, Roland Kammerer (roland.kamme...@linbit.com) wrote: On Sun, Jul 17, 2016 at 11:01:50PM +0200, Roland Kammerer wrote: > On Sat, Jul 16, 2016 at 11:34:41AM -0700, Jason Dillon wrote: > > > > FTR I’m using just the standard gcloud ubuntu 16.04 image: > > > > FTR I tried this a bunch of times and it worked as expected once or > > twice, then freaked out. :-( > > Hi Jason, > > so far I have not been able to reproduce it in my xenial VMs, but we > will investigate that ASAP. For now, thanks for reporting! Hi Jason, still no luck with reproducing (and from the trace it looks like the bug is below DRBD). Could you help us to reproduce it? Make sure that there are no drbdmanage resource and then start with a 200MB volume: "drbdmanage nv testres 200M -d2" Make sure there are no other resources, so the testres/volume should get /dev/drbd100. Then run that (sloppy) bash script[1], start with: ./test.sh 10 all You can trigger a mount/umount test only with: ./test.sh 10 notall I executed 50 test runs with "all" and 100 "mount/umount" without any issues. The only difference is see for now is that I execute it in my local xenial VMs and that my volume size might be much smaller. If that works, please remove the resource and create a new one with the size you started with originally (and adapt the "dd count"). Thanks, rck [1] ----------8<----------8<---------- #!/bin/bash for i in $(seq $1); do echo "Test: $i" if [ "$2" = "all" ]; then mkfs.ext4 -F -E discard /dev/drbd100 fi mount /dev/drbd100 /mnt if [ "$2" = "all" ]; then dd if=/dev/urandom of=/mnt/test.bin bs=1M count=150 fi umount /mnt dmesg | egrep BUG if [ "$?" = "0" ]; then echo "triggered bug" break fi done ----------8<----------8<---------- _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
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