Forwarding from Frank Schreuder who was having some issues sending this to the mailing list. ----- Begin forwarded message ----- > Subject: Reproducible live disk detach bug > > Hey guys, > > I am currently running into a reproducible libvirt bug when I detach a > disk from a running VM using libvirt 1.2.18 and qemu 2.3.0. > > I can attach a disk to a running VM without any problems. > During the attach operation I don't create a disk alias name, which > results in libvirt generating an unique alias. > Using virsh dumpxml I get the following output(snippet): > > <disk type='file' device='disk'> > <driver name='qemu' type='raw' cache='none'/> > <source file='/var/local/mnt/test-storage/test-storage.raw'/> > <backingStore/> > <target dev='vde' bus='virtio'/> > <iotune> > <read_bytes_sec>94371840</read_bytes_sec> > <write_bytes_sec>31457280</write_bytes_sec> > <read_iops_sec>1000</read_iops_sec> > <write_iops_sec>200</write_iops_sec> > </iotune> > <alias name='virtio-disk4'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> > </disk> > > As you can see, libvirt generates 'virtio-disk4' as an alias. But as > soon as I try to detach the disk from the running VM, I will receive the > following two errors in my libvirt log: > > 2015-08-06 10:48:59.943+0000: 11657: warning : > qemuMonitorJSONHandleDeviceDeleted:939 : missing device in device > deleted event > 2015-08-06 10:48:59.945+0000: 11662: error : > qemuMonitorTextDriveDel:2594 : operation failed: deleting > drive-virtio-disk4 drive failed: 2015-08-06T10:48:59.945058Z Device > 'drive-virtio-disk4' not found > > Apparently libvirt tries to detach the disk with a drive- prefix, which > doesn't exist? The drive seems to detach correctly though. > > I hope somebody with more extensive knowledge about libvirt can help me > solve this issue. If more information is needed, feel free to contact me. > > Thanks, > Frank ----- End forwarded message ----- -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/ -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list