On Tuesday 8 May 2012 at 18:56, Frido Roose wrote: > Hello, > > I wonder what the "open error -1" / "release open_disk error" messages in sanlock.log actually mean. > > I saw these messages in the log on a KVM host that rebooted, and after running "/usr/sbin/virt-sanlock-cleanup" on that host. > The resources where disks from 2 guests running on another KVM host. > > So in fact the disks are still in use, bot got cleaned up by the other KVM host because it thought they were not longer in use... > > Several questions: > 1. Could this indicate a problem with the lease of these resources on the server that host these guests? > Let's try to answer myself from what I've learned so far... Doing a "sanlock client status" revealed that in fact virt-sanlock-cleanup had removed the resource, so I suspect the device were no longer 'locked' at that point. The reason for this is still unclear to me, but I think I found a way to re-register the resources. > 2. Is there a way to reregister these resources, because they are still in use (but not for sanlock it seems)? I made a script to reregister the resources by looking up the devices that were assigned to the VM and by running some sanlock commands. The crucial part in this is: dd if=/dev/zero of=/var/lib/libvirt/sanlock/$MD5 bs=1M count=1 chmod 600 /var/lib/libvirt/sanlock/$MD5 sanlock direct init -r __LIBVIRT__DISKS__:$MD5:/var/lib/libvirt/sanlock/$MD5:0 sanlock client acquire -r __LIBVIRT__DISKS__:$MD5:/var/lib/libvirt/sanlock/$MD5:0 -p $pid The $pid of the VM was still registered with the sanlock daemon, so running these commands was sufficient. > 3. Overall, is it a bad idea to run virt-sanlock-cleanup? Running virt-sanlock-cleanup now leaves the resources assigned, so I don't know why the were cleaned up. Perhaps sanlock was not completely ready with initialization after the reboot… I'm not sure. I guess time will figure out. Best regards, Frido _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
