Re: [libvirt] save / restore for KVM

On Sat, Jul 05, 2008 at 01:59:26PM +0200, Matthias Pfafferodt wrote: > Hello, > > I try to save a KVM domain which has its hard disk on a LVM volume. I can > execute the command to save the domain but restore fails > > # virsh list > Id Name State > ---------------------------------- > 3 kvm-linux03 running > 4 kvm-linux01 running > > # virsh save kvm-linux01 ./kvm-linux01.ram > Domain kvm-linux01 saved to ./kvm-linux01.ram > > # virsh list > Id Name State > ---------------------------------- > 3 kvm-linux03 running > > # virsh restore ./kvm-linux01.ram > libvir: QEMU error : operation failed: failed to start VM > error: Failed to restore domain from ./kvm-linux01.ram You don't mention which version of KVM or libvirt being used, or which distro. If its Fedora then plesae file a bug against libvirt or KVM. There's one possible issue in KVM that could be causing it depending on which version you're using.

> I tried to save and restore this domain using kvm directly > > # /usr/bin/qemu-kvm -m 1024 -boot c -drive > file=/dev/virtual/kvm_linux01,if=ide,index=0,boot=on -net > nic,macaddr=00:16:3e:00:01:02,vlan=0 -net > tap,fd=24,script=,vlan=0,ifname=vnet3 > (qemu) savevm kvm-linux01.ram > Device id0-hd0 does not support VM state snapshots Libvirt doesn't use savevm - it uses the migration protocol support instead.

Daniel