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based on
Kashyap Chamarthy[link1] post
- list domains
# virsh list
Id Name State
----------------------------------------------------
1 centos64 running
- managed save of a domain state
# virsh managedsave centos64
Domain centos64 state saved by libvirt
# qemu-img snapshot -c snap1 /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
# qemu-img info /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
image: /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
file format: qcow2
virtual size: 50G (53687091200 bytes)
disk size: 1.7G
cluster_size: 65536
Snapshot list:
ID TAG VM SIZE DATE VM CLOCK
1 snap1 0 2013-03-12 10:40:37 00:00:00.000
# qemu-img convert -f qcow2 -O raw -s snap1 /mnt/backup/VMs/images/centos/6.4/centos64.qcow2 snap1-centos64.img
# qemu-img info snap1-centos64.img
image: snap1-centos64.img
file format: raw
virtual size: 50G (53687091200 bytes)
disk size: 834M
# ls -lash /mnt/backup/VMs/images/centos/6.4/centos64.qcow2 snap1-centos64.img
1,7G -rw-r--r-- 1 root root 1,7G Μάρ 12 10:40 /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
835M -rw-r--r-- 1 root root 50G Μάρ 12 10:43 snap1-centos64.img
# qemu-img snapshot -d snap1 /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
# qemu-img info /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
image: /mnt/backup/VMs/images/centos/6.4/centos64.qcow2
file format: qcow2
virtual size: 50G (53687091200 bytes)
disk size: 1.7G
cluster_size: 65536
# virsh start centos64
Domain centos64 started