Docker默认存储路径：
# docker info
......
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
......
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
127.0.0.0/8
Registries: docker.io (secure)
修改Docker存储路径：
# systemctl stop docker
# cd /var/lib
# cp –rf docker /data
# rm –rf docker
# ln –s /data/docker docker
验证Docker存储信息：
# docker info
......
Data loop file: /data/docker/devicemapper/devicemapper/data
......
Docker Root Dir: /data/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
127.0.0.0/8
Registries: docker.io (secure)