[one-users] open /dev/kvm: Permission denied on Debian Squeeze

[Valentin Bud]

Hello,

I have recently setup OpenNebula 3.6 on 2 Debian Squeeze boxes. Both
machines function as hosts, one of them as frontend.
I have followed the OpenNebula documentation [1] to setup the KVM driver on
the hosts.

### Host A

# kvm --version
QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008
Fabrice Bellard

# virsh --version
0.8.3

# grep -vE '^($|#)' /etc/libvirt/qemu.conf
user = "oneadmin"
group = "oneadmin"
dynamic_ownership = 0

# id oneadmin
uid=1001(oneadmin) gid=1001(oneadmin)
groups=1001(oneadmin),106(kvm),108(libvirt)

# ls -al /dev/kvm
crw-rw---- 1 root kvm 10, 232 Jul 25 11:23 /dev/kvm

### Host B

# kvm --version
QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) 2003-2008
Fabrice Bellard

# virsh --version
0.8.3

# grep -vE '^($|#)' /etc/libvirt/qemu.conf
user = "oneadmin"
group = "oneadmin"
dynamic_ownership = 0

# id oneadmin
uid=1001(oneadmin) gid=1001(oneadmin)
groups=1001(oneadmin),106(kvm),108(libvirt)

# ls -al /dev/kvm
crw-rw---- 1 root kvm 10, 232 Jul 25 11:23 /dev/kvm

Doesn't matter on which host the VM gets deployed, the error is the same.
The error follows:

LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
HOME=/root USER=root LOGNAME=root QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M
pc-0.12 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name one-4
-uuid a7db4cd7-e258-503a-cc57-59d2dc1135ea -nodefaults -chardev
socket,id=monitor,path=/var/lib/libvirt/qemu/one-4.monitor,server,nowait
-mon chardev=monitor,mode=readline -rtc base=utc -boot c -device
lsi,id=scsi0,bus=pci.0,addr=0x5 -drive
file=/var/lib/one/datastores/0/4/disk.0,if=none,id=drive-scsi0-0-0,boot=on,format=qcow2
-device scsi-disk,bus=scsi0.0,scsi-id=0,drive=drive-scsi0-0-0,id=scsi0-0-0
-device rtl8139,vlan=0,id=net0,mac=02:00:0a:41:02:65,bus=pci.0,addr=0x3
-net tap,fd=36,vlan=0,name=hostnet0 -device
rtl8139,vlan=1,id=net1,mac=02:00:0a:41:03:65,bus=pci.0,addr=0x4 -net
tap,fd=37,vlan=1,name=hostnet1 -usb -vnc 0.0.0.0:4 -vga cirrus -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6
open /dev/kvm: Permission denied
Could not initialize KVM, will disable KVM support

I don't have AppArmor installed or any other tool of this kind. It's just a
stock Debian Squeeze install. OpenNebula was compiled on another machine
and installed on Host A which is the frontend.

Does anyone of you have any idea about this error? I have Googled around
but could not find any answer. Everything seems correct as per OpenNebula
KVM documentation [1].

Thank you for your time invested in reading this email. Cheers and Goodwill,
Valentin Bud

[1]: http://opennebula.org/documentation:rel3.6:kvmg
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