docker info 查看 鏡像存放的目錄
默認存放目錄 /var/lib/docker
停止docker服務
systemctl stop docker.service
在掛載的磁盤目錄下創建存放鏡像目錄
mkdir -p /data/var/lib
遷移鏡像文件
mv /var/lib/docker /data/var/lib/docker
鏈接到原目錄
ln -s /data/var/lib/docker /var/lib/docker
啟動服務后查看鏡像存放目錄
docker info | grep "Docker Root Dir"
WARNING: the overlay storage-driver is deprecated, and will be removed in a future release.
Docker Root Dir: /data/var/lib/docker
參考：
https://blog.csdn.net/qq_37674858/article/details/79976751
https://blog.csdn.net/qijian2003122/article/details/82886989
https://www.cnblogs.com/linux123/p/12176784.html