Re: [libvirt] problem attaching/detaching disk

Finally, everything works for if I simply change my template to use the /usr/libexec/qemu-kvm instead of /usr/bin/kvm, which is a symbolic link to it. Not sure why it matters but that does solve all the mysteries. Shi On Fri, Mar 4, 2011 at 9:56 AM, Shi Jin <jinzishuai(a)gmail.com&gt; wrote: > 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 <wency(a)cn.fujitsu.com&gt; >> 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. > > -- Shi Jin, Ph.D.