docker私有仓库间同步问题

Question

假设有两个私有仓库A与B，A经常改动,B要与A同步,目前能想到的是
1).直接rsync同步A仓库所在的文件夹到B，然后docker pull B中image，直接报HTTP code: 404
2).docker pull A中的镜像，然后push到B中 ---感觉这种方法太土了
有智能点的方法么?

Answer 1

1). Directly rsync the folder where A warehouse is located to B, then docker pull the image in B, and directly report HTTP code: 404
The 404 reported should be that the configuration of B is different from that of A. It should be OK to change it. Is there a better way?

Answer 2

Registry mirror does this. But v1 does not support it. v2 will support mirror for private registry