> > It seems that your qemu does not support monitor command 'drive_add'. > What's version of your qemu? > > Thank you. Here is my version [cloudadmin@test2 ~]$ /usr/libexec/qemu-kvm -version QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2), Copyright (c) 2003-2008 Fabrice Bellard
I finally think it is a permission issue. If I run commands as root and get kvm run by the default qemu user, both attach-disk and detach-disk works like your case. However, if I set to run as another user, such as cloudamin, attach-disk works but detach-disk does not. My libvirtd.conf has unix_sock_group = "cloudadmin" unix_sock_rw_perms = "0770" auth_unix_ro = "none" auth_unix_rw = "none" log_level = 3 log_outputs="3:file:/var/log/libvirt/libvirtd.log" and qemu.conf has user = "cloudadmin" group = "cloudadmin" dynamic_ownership = 0 All images are owned by the cloudadmin:cloudadmin. Is there a problem with this setup? Thank you very much. Shi > > 15:31:52.902: debug : virEventRunOnce:595 : Poll got 1 event > > 15:31:52.902: debug : virEventDispatchTimeouts:405 : Dispatch 3 > > 15:31:52.902: debug : qemuMonitorAddDevice:1878 : mon=0x7f3628341370 > > > device=virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1 > > When 'drive_add' failes, we do not call qemuMonitorAddDevice(). But it is > called. > > > 15:31:52.902: debug : virEventDispatchHandles:450 : Dispatch 8 > > 15:31:52.902: debug : qemuMonitorCommandWithHandler:230 : Send command > > 'device_add > > > virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1' > > for write with FD -1 > > What's the reply of command 'device_add'? Can you provide it. I think it > should fail. > > Thanks. > Wen Congyang > > > > > Than you very much. > > > > Shi > > > > > > > > > > > > On Thu, Mar 3, 2011 at 10:12 PM, Wen Congyang <[email protected]> > wrote: > > > >> At 03/04/2011 01:00 PM, Shi Jin Write: > >>>> > >>>> > >>>> > >>>> <disk type='file' device='disk'> > >>>> <driver name='qemu' type='qcow2' cache='none'/> > >>>> <source file='/var/lib/libvirt/images/rhel6rc_64.img'/> > >>>> <target dev='hda' bus='ide'/> > >>>> <alias name='ide0-0-0'/> > >>>> <address type='drive' controller='0' bus='0' unit='0'/> > >>>> </disk> > >>>> <disk type='file' device='cdrom'> > >>>> <driver name='qemu' type='raw'/> > >>>> <source file='/var/lib/libvirt/images/test.iso'/> > >>>> <target dev='hdc' bus='ide'/> > >>>> <readonly/> > >>>> <alias name='ide0-1-0'/> > >>>> <address type='drive' controller='0' bus='1' unit='0'/> > >>>> </disk> > >>>> <disk type='file' device='disk'> > >>>> <driver name='file' type='qcow2'/> > >>>> <source file='/var/lib/libvirt/images/test3.img'/> > >>>> <target dev='vdb' bus='virtio'/> > >>>> <alias name='virtio-disk1'/> > >>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > >>>> function='0x0'/> > >>>> </disk> > >>>> <controller type='ide' index='0'> > >>>> <alias name='ide0'/> > >>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > >>>> function='0x1'/> > >>>> </controller> > >>>> > >>>> > >>>> Thank you very much. It is exactly the same output as mine, > particularly > >>> <driver name='file' type='qcow2'/> > >>> I thought it has to be name='qemu' to detach properly but since you > >> didn't > >>> have a problem, I am very lost on why mine didn't work. > >>> > >>> My libvirtd.log shows (with debugging turned on) > >>> 14:43:18.965: debug : qemuMonitorCommandWithHandler:235 : Receive > command > >>> reply ret=0 errno=0 33 bytes 'Device 'virtio-disk1' not found^M > >>> ' > >>> 14:43:18.965: debug : virEventDispatchTimeouts:405 : Dispatch 3 > >>> 14:43:18.965: debug : virEventDispatchHandles:450 : Dispatch 8 > >>> 14:43:18.965: error : qemuMonitorTextDelDevice:2314 : operation failed: > >>> detaching virtio-disk1 device failed: Device 'virtio-disk1' not found^M > >>> > >>> Do you know what the "device not found" error means? > >> > >> It seems attaching virtio-disk1 failed. > >> Can you provide the log when you attach virtio-disk1? > >> > >> Thanks. > >> Wen Congyang > >> > >>> > >>> Thanks. > >>> > >>> Shi > >>> > >> > >> > > > > > > -- Shi Jin, Ph.D.
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