On 08/06/2012 12:12 PM, Jeff Strunk wrote: > I'm having some trouble creating KVM domains with RBD block devices using > virsh. I've managed to get virsh to define the domain, but it gives an > error when trying to start the domain: > error: Failed to start domain test0 > error: internal error process exited while connecting to monitor: char > device redirected to /dev/pts/3 kvm: -drive > file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: error > connecting This is the relevant error. If you don't have an /etc/ceph/ceph.conf file, or it (or the keyring file possibly) is unreadable by qemu due to apparmor/selinux etc, you'll need to specify all the information needed to connect in the drive xml. This includes the monitor host and the libvirt secret uuid, i.e.: <disk type='network' device='disk'> <driver name='qemu' type='raw'/> <source protocol='rbd' name='rbd/test0'> <host name='thinkmate3' port='6789'/> <host name='thinkmate4' port='6789'/> </source> <auth username='admin'> <secret type='ceph' uuid='f0836fcb-9c05-5ccf-653a-eb1d0308e247'/> </auth> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> Josh > kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: > could not open disk image rbd:rbd/test0: No such file or directory> >>From libvirt's QEMU log: > 2012-08-06 18:36:57.788+0000: starting up > LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin > QEMU_AUDIO_DRV=none /usr/bin/kvm -name test0 -S -M pc-1.0 -enable-kvm -m > 1024 -smp 1,sockets=1,cores=1,threads=1 -uuid > 3e727624-f336-d674-4e0c-234641fc9987 -nodefconfig -nodefaults -chardev > socket,id=charmonitor,path=/var/lib/libvirt/qemu/test0.monitor,server,now > ait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc > -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive > file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw -device > virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=vi > rtio-disk0,bootindex=1 -drive > if=none,id=drive-ide0-1-0,readonly=on,format=raw -device > ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev > tap,fd=19,id=hostnet0 -device > virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:8c:e4:92,bus=pci.0,ad > dr=0x3 -chardev pty,id=charserial0 -device > isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -vga cirrus -!> > device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 > > Domain id=5 is tainted: high-privileges > char device redirected to /dev/pts/2 > kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: > error connecting kvm: -drive > file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: could not > open disk image rbd:rbd/test0: No such file or directory 2012-08-06 > 18:36:58.353+0000: shutting down > > I can, however, successfully run a KVM virtual machine with an RBD block > device with the following command: > kvm -drive file=rbd:rbd/test1,id=drive-virtio-disk0,format=raw -cdrom > /var/lib/libvirt/images/ubuntu-12.04-server-amd64.iso > > kvm will boot with the "-drive > file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw" options, but > the disk is not detected unless "if=none" is removed. > > Has anyone else figured this out? > > Thank you, > Jeff > > Here is my rbd pool definition: > ######### BEGIN > <pool type="rbd"> > <name>rbd</name> > <source> > <name>rbd</name> > <host name='thinkmate3' port='6789'/> > <host name='thinkmate4' port='6789'/> > <auth username='admin' type='ceph'> > <secret uuid='f0836fcb-9c05-5ccf-653a-eb1d0308e247'/> > </auth> > </source> > </pool> > ######### END > > My rbd volumes: > # virsh vol-list rbd > Name Path > ----------------------------------------- > test0 rbd/test0 > test1 rbd/test1 > test2 rbd/test2 > > Here is my domain definition: > ######### BEGIN > <domain type='kvm'> > > <name>test0</name> > <uuid>3e727624-f336-d674-4e0c-234641fc9987</uuid> > <memory unit='KiB'>1048576</memory> > <currentMemory unit='KiB'>1048576</currentMemory> > <vcpu placement='static'>1</vcpu> > <os> > > <type arch='x86_64' machine='pc-1.0'>hvm</type> > <boot dev='hd'/> > > </os> > <features> > > <acpi/> > <apic/> > <pae/> > > </features> > <clock offset='utc'/> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>restart</on_crash> > <devices> > > <emulator>/usr/bin/kvm</emulator> > <disk type='network' device='disk'> > > <driver name='qemu' type='raw'/> > <source protocol='rbd' name='rbd/test0'/> > <target dev='vda' bus='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > > </disk> > <disk type='block' device='cdrom'> > > <driver name='qemu' type='raw'/> > <target dev='hdc' bus='ide'/> > <readonly/> > <address type='drive' controller='0' bus='1' target='0' unit='0'/> > > </disk> > <controller type='ide' index='0'> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x1'/> > > </controller> > <controller type='usb' index='0'> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x2'/> > > </controller> > <interface type='network'> > > <mac address='52:54:00:8c:e4:92'/> > <source network='default'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > > </interface> > <serial type='pty'> > > <target port='0'/> > > </serial> > <console type='pty'> > > <target type='serial' port='0'/> > > </console> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes'/> > <video> > > <model type='cirrus' vram='9216' heads='1'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' > function='0x0'/> > > </video> > <memballoon model='virtio'> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' > function='0x0'/> > > </memballoon> > > </devices> > > </domain> > ######## END