查看虚拟机快照
virsh snapshot-list vmname
查看快照的详细信息
virsh snapshot-info vmname snapname
创建内部快照
virsh snapshot-create-as vmname snapname
创建带内存内部快照
virsh snapshot-create-as --migrate vmname snapname
创建外部快照
virsh snapshot-create-as vmname snapname --no-metadata --disk-only --atomic
commit到base镜像
virsh blockcommit vmname vda --verbose --pivot --active
7.pull到top镜像
virsh blockpull vmname vda --wait --verbose
在线rebase
virsh qemu-monitor-command vmname ‘{"execute": "drive-backup", "arguments":{"device":"drive-virtio-disk0", "sync":"full", "target":"/path/imagename", "format":"qcow2"}}‘
离线rebase
qemu-img rebase -u -b /path/base /path/top
qcow2快照操作
原文：http://blog.51cto.com/zybcloud/2285548
