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Hi there, I have been playing with libvirt/KVM on saving the VM to a checkpoint file and restoring it from this file. It has worked very well for me on my RHEL-5.5 setup, until I added hot-plugged volumes. If I add a volume to a running VM using "virsh attach-disk" and then call "virsh save". The checkpoint file was successfully written and VM stopped. However, I get errors restoring it with "virsh restore": $ virsh restore checkpoint error: Failed to restore domain from checkpoint error: operation failed: failed to start VM I did two thinngs to narrow down the problem: 1. If I manually remove the lines of attached volume from the checkpoint file, then it restores fine. 2. If I have the additioinal volumes in the original XML template instead of hot-plugging them on the fly, the save/restore work very well. So I think the problem is in save/restore hot-plugged volumes. Thanks. Shi
Fixed in libvirt-0.8.2-1.el5
Verified with Passed in below environment on 4 arches: -RHEL5.6-Server-x86_64-KVM -RHEL5.6-Server-x86_64-Xen -RHEL5.6-Client-i386-Xen -RHEL5.6-Server-ia64-Xen kernel-xen-2.6.18-228.el5 xen-3.0.3-117.el5 kvm-qemu-img-83-205.el5 kernel-2.6.18-228.el5 libvirt-0.8.2-8.el5 Steps: 1. Run an KVM domain. In guest, load acpiphp module # modprobe acpiphp 2. Attach a disk to the domain. # virsh attach-disk rhel5u5 /var/lib/libvirt/images/newdisk.img vda --sourcetype=file --driver=qemu --subdriver=qcow2 Disk attached successfully In geust, the new disk is seen. # fdisk -l 3. Save and restore the domain. # virsh save rhel5u5 /tmp/tt.save Domain rhel5u5 saved to /tmp/tt.save # virsh restore /tmp/tt.save Domain restored from /tmp/tt.save # virsh list --all Id Name State ---------------------------------- 16 rhel5u5 running
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHEA-2011-0060.html