My previous attempt with Fedora 16 to create a nested virtual guest on an Intel CPU was only 90% success,. I just gave a retry with Fedora 17, and the newest available virt packages from virt-preview repository.
I posted some notes, configurations of physical host, regular guest and nested guest, and the scripts I used on my fedora people page
Few observations:
- Regular guest(L1) created just fine on the physical host(L0). No news here, this is expected.
- Shutting down the regular guest causes ‘virsh’ to hang with a segfault. To avoid this, I have to restart libvirtd daemon, and then start the guest. I posted some more details to fedora virt list here and here
- Now, when I try to create the ‘nested guest'(L2), I don’t see any progress on the serial console once it attempts to retrieve initrd and vmlinuz :
# ./create-nested-guest.bash Creating qcow2 disk image.. Formatting '/export/vmimgs/nested-guest-f17.qcow2', fmt=qcow2 size=10737418240 encryption=off cluster_size=65536 preallocation='metadata' 11G -rw-r--r--. 1 root root 11G Jul 28 10:47 /export/vmimgs/nested-guest-f17.qcow2 Starting install... Retrieving file .treeinfo... | 1.8 kB 00:00 !!! Retrieving file vmlinuz... | 8.9 MB 00:00 !!! Retrieving file initrd.img... | 47 MB 00:00 !!! Creating domain... | 0 B 00:00
I tried to view,using less or tail, system/libvirt logs, check status of libvirtd daemon, or try virsh list in the ‘regular guest’ to no avail. Those commands are just hung on the stdout.
A little bit more detail in a text file here.
Meanwhile, here’s the version detail. I used the same kernel, qemu-kvm, libvirt on both Physical host and Regular guest:
[root@moon ~]# uname -r ; rpm -q qemu-kvm libvirt 3.4.6-2.fc17.x86_64 qemu-kvm-1.1.0-9.fc17.x86_64 libvirt-0.9.13-3.fc17.x86_64 [root@moon ~]#
I’m still investigating, will update here, once I have more information.
Kashyap Chamarthy 