Red Hat Bugzilla – Bug 411901
virt-manager doesn't pick up presence of kvm (qemu-kvm)
Last modified: 2007-12-05 09:53:19 EST
Description of problem: On installation of virt-manager and kvm, virt-manager doesn't seem to notice that qemu-kvm is present. Version-Release number of selected component (if applicable): python-virtinst-0.300.1-3.fc8 virt-viewer-0.0.2-2.fc8 libvirt-0.3.3-2.fc8 libvirt-python-0.3.3-2.fc8 virt-manager-0.5.2-2.fc8 kvm-36-7.fc8 How reproducible: Everytime Steps to Reproduce: 1. yum install virt-manager kvm 2. run virt-manager 3. choose to make a new VM Actual results: The tick box to select hardware acceleration is greyed out and not selectable. Proceeding with the installation crashes out with: Unable to complete install '<class 'libvirt.libvirtError'> virDomainCreateLinux() failed Cannot find QEMU binary /usr/bin/qemu-system-x86_64: No such file or directory Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/create.py", line 616, in do_install dom = guest.start_install(False, meter = meter) File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 724, in start_install return self._do_install(consolecb, meter) File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 741, in _do_install self.domain = self.conn.createLinux(install_xml, 0) File "/usr/lib64/python2.5/site-packages/libvirt.py", line 573, in createLinux if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self) libvirtError: virDomainCreateLinux() failed Cannot find QEMU binary /usr/bin/qemu-system-x86_64: No such file or directory ' So, virt-manager is not aware of qemu-kvm and is looking for qemu binaries. Expected results: A hardware accelerated qemu-kvm guest is created. Additional info:
Oh, I should've mentioned, in between steps 1 and 2 above I did do a /sbin/service libvirtd start
This might also be useful info (note that I did also install plain qemu). I am not sure why it is listing qemu-system-x86_64 as the emulator for hvm, surely this should be qemu-kvm virsh # connect qemu:///system virsh # list Id Name State ---------------------------------- virsh # capabilities <capabilities> <host> <cpu> <arch>x86_64</arch> </cpu> </host> <guest> <os_type>hvm</os_type> <arch name="x86_64"> <wordsize>64</wordsize> <emulator>/usr/bin/qemu-system-x86_64</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> </arch> <features> <acpi default='on' toggle='yes'/> <apic default='on' toggle='no'/> </features> </guest> <guest> <os_type>hvm</os_type> <arch name="i686"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu</emulator> <domain type="qemu"/> <machine>pc</machine> <machine>isapc</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mips"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mips</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="mipsel"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-mipsel</emulator> <domain type="qemu"/> <machine>mips</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="sparc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-sparc</emulator> <domain type="qemu"/> <machine>sun4m</machine> </arch> </guest> <guest> <os_type>hvm</os_type> <arch name="ppc"> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-ppc</emulator> <domain type="qemu"/> <machine>g3bw</machine> <machine>mac99</machine> <machine>prep</machine> </arch> </guest> </capabilities>
That list of capabilities shows that no KVM support is detected. It is not sufficient to merely have the 'qemu-kvm' binary installed. You need to have the kernel modules loaded. If /dev/kvm does not exist, then you won't be able to create KVM guests. Please confirm whether /dev/kvm exists.
Aha... that's a weird thing. /dev/kvm is not there. However, the kvm module is loaded: # /sbin/lsmod | grep kvm kvm 69657 0 But, I see there's no kvm-intel loaded. And worse: # /sbin/modprobe kvm-intel FATAL: Error inserting kvm_intel (/lib/modules/2.6.23.8-63.fc8/kernel/drivers/kvm/kvm-intel.ko): Operation not supported I suspect then this is a bug with the kernel...
Not a virt-manager bug then....