Sometimes to reproduce a bug or verify a fix to libvirt, you want to just be able to start a qemu VM under KVM, not really caring what it does. These instructions will get you there, assuming you are on a standard Ubuntu ec2 image, as user ubuntu with libvirt and qemu installed.
This will attach to a bridge called br0. Change that name if you need to.
- Create the disk image:
qemu-img create cdboot.img 1G
- Get a tiny bootable iso:
wget -O mini.iso http://archive.ubuntu.com/ubuntu/dists/precise/main/installer-amd64/current/images/netboot/mini.iso
- Define the vm:
virsh define cdboot.xml
- Now the vm should be able to start
virsh start cdboot virsh list # this should show cdboot running. you can connect probably as 'gvncviewer :0' virsh destroy cdboot
- To make this vm autostart,
virsh autostart cdboot