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Re: [virt-tools-list] how to convert virtualbox vm instance to kvm instance, and then run kvm instance under virt-manager?



dear virt-manager team,

i run "VBoxManage clonehd --format RAW image.vdi image.img" to convert the virtualbox .vdi vm instance to raw format, and with virt-manager to create new vm with the raw format, it works fine, i.e. can start the new vm instance successfully and the networking access is the same as before.

but after run "qemu-img convert -f raw image.img -O qcow2 image.qcow" to convert the raw format to qcow2 format, and with virt-manager to create new vm with the qcow2 format, it doesn't work, i.e. get "no bootable device" error when start the new vm with qcow2 format, no need to say the networking access.

the size of the ram format disk is about 40GB, while the size of the qcow2 format disk is about 1.3GB (similar as that of the original image.vdi size), nearly 30 times smaller than the raw format.

if not convert the raw format to qcow2 format, then the disk size is too large, waste of disk space.

there are ubuntu 12.04, opennebula 3.6.0, and kvm, qemu, libvirt etc installed.

it is much appreciated if you can help with this.

thanks,
david su

On Thu, Nov 15, 2012 at 10:48 PM, Qiubo Su (David Su) <qiubosu gmail com> wrote:
dear virt-manager team,

i have some applications (e.g. web hosting system and VOIP telephony system) installed in the virtualbox vm instances (with bridged adapter for networking), but since i set up the opennebula cloud system with kvm hypervisor, i have been trying to migrate these virtualbox vm instances to under kvm hypervisor. i run "qemu-img convert virtualboximage.vdi -O qcow2 kvmimage.qcow" to get vm instance under kvm hypervisor. but when i tried to use virt-manager (corresponding to virtualbox) to import the kvmimage.qcow (as the virtualboximage.vdi in the virtualbox) and configure everything for the kvmimage.qcow vm instance, and then run this vm instance under virt-manager, it is unbootable. the attached file is the screenshot when this vm instance is booting.

it is much appreciated if anyone can let me know the correct procedure to convert the virtualbox vm instance to kvm vm instance, to import the disk image to virt-manager, to configure this vm instance in the virt-manager, to make it starts successfully and networking access correctly as well.

thanks,
david su


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