[libvirt] how to enable ceph-rbd in libvirt.

[Josh Durgin]

On 10/10/2012 07:52 PM, yue wrote:
> 1.my libvirtd version is 0.9.10.  i rebuild qemu with --enable-rbd.
> it seems not work  if guest-os has a rbd disk.
> -----rbd disk info ----
>   <disk type='network' device='disk'>
>        <driver name='qemu' type='raw'/>
>        <auth username='cloud'>
>          <secret type='ceph' uuid='7a91dc24-b072-43c4-98fb-4b2415322b0f'/>
>        </auth>
>        <source protocol='rbd' name='cloud/testrbd'>
>          <host name='192.168.10.4' port='6789'/>
>        </source>
>        <target dev='vdb' bus='virtio'/>
>        <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
>      </disk>
> 2.-----------------------error log---------
> LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/root USER=root LOGNAME=root QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -S -M rhel6.2.0 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name xpSP3 -uuid b45bd66a-6700-4905-c5f4-4c799413d7b7 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/xpSP3.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=/var/lib/libvirt/images/xpSP3.img,if=none,id=drive-ide0-0-0,format=raw,cache=none -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -drive file=rbd:cloud/testrbd:id=cloud:key=AQCGbGRQ+M+NGBAATtylZNiSxqCTQ4uaApd+9w==:auth_supported=cephx none:mon_host=192.168.10.4\:6789,if=none,id=drive-virtio-disk1,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1 -netdev tap,fd=26,id=hostnet0 -device!
  e!
>   1000,netdev=hostnet0,id=net0,mac=52:54:00:2a:8c:48,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -vnc 0.0.0.0:0 -vga std -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
> Domain id=6 is tainted: high-privileges
> char device redirected to /dev/pts/4
> qemu-kvm: -drive file=rbd:cloud/testrbd:id=cloud:key=AQCGbGRQ+M+NGBAATtylZNiSxqCTQ4uaApd+9w==:auth_supported=cephx none:mon_host=192.168.10.4\:6789,if=none,id=drive-virtio-disk1,format=raw: could not open disk image rbd:cloud/testrbd:id=cloud:key=AQCGbGRQ+M+NGBAATtylZNiSxqCTQ4uaApd+9w==:auth_supported=cephx none:mon_host=192.168.10.4\:6789: No such file or directory
> 2012-10-11 10:37:24.215+0000: shutting down

You may need this patch to libvirt: 
http://www.redhat.com/archives/libvir-list/2012-May/msg00003.html

This is included in libvirt 0.9.12.

Josh