修改docker的镜像容器存储路径

默认docker的存储路径在：

/var/lib/docker

# docker info
Containers: 1
Images: 41
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Dirs: 43
Execution Driver: native-0.2
Kernel Version: 3.13.0-32-generic
WARNING: No swap limit support

可以这样：

service stop docker.io

mv /var/lib/docker to SAN

ln -s SAN /var/lib/docker

最后

# docker info
Containers: 5
Images: 572
Storage Driver: aufs
Root Dir: /data/docker/aufs
Dirs: 593
Execution Driver: native-0.2
Kernel Version: 3.16.0-30-generic
WARNING: No swap limit support