On 04/07/2010 10:45 PM, Dustin Xiong wrote: > > > >> Date: Tue, 6 Apr 2010 14:17:47 +0800 >> Subject: Re: [virt-tools-list] Question about the image format >> From: [email protected] >> To: [email protected] >> CC: [email protected] >> >> The virt-manager supports it I think. I've tried it on >> virt-manager-0.8.3 and it works well as the qemu-kvm commands. >> >> Could you paste your XML file of the VM under virt-manager here? >> > I can't create the VM, so I didn't have the XML file. > But I could use the same way to create VM2. The only differences is the disk > images. > The vm2.img comes from this command : qemu-img create -f qcow vm2.img 4G > The vm3.img comes from the command : qemu-img create -b vm1.img -f qcow > vm3.img > > virsh # create vm3.xml > error: Failed to create domain from vm3.xml > error: internal error unable to start guest: qemu: could not open disk image > /var/lib/libvirt/images/vm3.img > > virsh # create vm2.xml > Domain vm2 created from vm2.xml > > The XML file as below: > <domain type='kvm'> > <name>vm2</name> > <uuid>7cb40798-1247-85e3-5e5b-e044eafbfff3</uuid> > <memory>524288</memory> > <currentMemory>524288</currentMemory> > <vcpu>1</vcpu> > <os> > <type arch='i686' machine='pc-0.11'>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='file' device='disk'> > <driver name='qemu' type='qcow'/> > <source file='/var/lib/libvirt/images/vm2.img'/> > <target dev='hda' bus='ide'/> > </disk> > <disk type='block' device='cdrom'> > <driver name='qemu' type='raw'/> > <target dev='hdc' bus='ide'/> > <readonly/> > </disk> > <interface type='network'> > <mac address='52:54:00:5d:2c:c6'/> > <source network='default'/> > </interface> > <serial type='pty'> > <target port='0'/> > </serial> > <console type='pty'> > <target port='0'/> > </console> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> > <video> > <model type='cirrus' vram='9216' heads='1'/> > </video> > </devices> > </domain> > > > <domain type='kvm'> > <name>vm3</name> > <uuid>7cb40798-1247-85e3-5e5b-e044eafbfff3</uuid> > <memory>524288</memory> > <currentMemory>524288</currentMemory> > <vcpu>1</vcpu> > <os> > <type arch='i686' machine='pc-0.11'>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='file' device='disk'> > <driver name='qemu' type='qcow'/> > <source file='/var/lib/libvirt/images/vm3.img'/> > <target dev='hda' bus='ide'/> > </disk> > <disk type='block' device='cdrom'> > <driver name='qemu' type='raw'/> > <target dev='hdc' bus='ide'/> > <readonly/> > </disk> > <interface type='network'> > <mac address='52:54:00:5d:2c:c6'/> > <source network='default'/> > </interface> > <serial type='pty'> > <target port='0'/> > </serial> > <console type='pty'> > <target port='0'/> > </console> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> > <video> > <model type='cirrus' vram='9216' heads='1'/> > </video> > </devices> > </domain> > > >>> I use the command 'qemu-img create -b vm1.img -f qcow vdisk.img' >>> create a new image vdisk.img. When I use virt-manager create a new VM based >>> on vdisk.img, failed. >>> The error as below: >>> >>> Unable to complete install '<class 'libvirt.libvirtError'> internal error >>> unable to start guest: qemu: could not open disk image >>> /media/disk/images/vdisk.img >>> >>> Traceback (most recent call last): >>> File "/usr/local/share/virt-manager/virtManager/create.py", line 1437, in >>> do_install >>> dom = guest.start_install(False, meter = meter) >>> File "/usr/local/lib/python2.6/dist-packages/virtinst/Guest.py", line 795, >>> in start_install >>> return self._do_install(consolecb, meter, removeOld, wait) >>> File "/usr/local/lib/python2.6/dist-packages/virtinst/Guest.py", line 896, >>> in _do_install >>> self.domain = self.conn.createLinux(install_xml, 0) >>> File "/usr/lib/python2.6/dist-packages! /libvirt.py", line 1077, in >>> createLinux >>> if ret is None:raise libvirtError('virDomainCreateLinux() failed', >>> conn=self) >>> libvirtError: internal error unable to start guest: qemu: could not open >>> disk image /media/disk/images/vdisk.img >>> >>> But if I don't use virt-manager. I just use the command >>> kvm -hda vdisk.img -m 1024 -cdrom rhel-server-5.4-i386-dvd.iso -boot d >>> or kvm vdisk.img -m 1024 >>> The VM could running. >>> >>> So I want to ask whether the virt-manager support the disk created by >>> 'qemu-img create -b vm1.img -f qcow vdisk.img' or not. >>> >>> Thank you very much. >>>
There is a similar bug already filed against libvirt in fedora: https://bugzilla.redhat.com/show_bug.cgi?id=579067 I don't think the security drivers know to change permissions of qcow2 backing files when launching a domain. The simplest way to work around this is to edit /etc/libvirt/qemu.conf and set security_driver="none" user="root" group="root" This provides less security, but is basically what we were doing in F11 and earlier. You may also need to 'setenforce 0' to set selinux to permissive. - Cole _______________________________________________ virt-tools-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/virt-tools-list
