qemu-img如何合并QCOW2增量图像 [英] how does qemu-img merge the QCOW2 delta images

问题描述

大家好，我是新来者. 我正在学习OpenStack和kvm，但现在遇到了一个难题:

Hello everyone， I am a newcomer. I am learning OpenStack and kvm,but now I met a difficult problem:

     I have a qcow2 image A, 

     a qcow2 delta image B whose backing file is A, 

     and a qcow2 image C whose backing file is B.

     Now I want to merge the B and C into a qcow2 image D whose backing file is A.

     I have tried to use qemu-img to solve it, but still didn't get positive solutions.

希望您能帮助我，非常感谢.

I hope you can help me, really appreciate.

推荐答案

cp C D
qemu-img rebase -b A D

这将创建名为D的C的副本，然后在A上重新建立D的位置.

This creates a copy of C called D and then rebases D on A.

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