docker pull 失败:ERROR: failed to register layer: write /var/lib/docker/image/devicemapper/layerdb/tmp/write-set-029245630/diff: no space left on device

问题描述：

ERROR: failed to register layer: write /var/lib/docker/image/devicemapper/layerdb/tmp/write-set-029245630/diff: no space left on device

空间不足了

解决方案：
思路：把images和Container存放到其他空间足的目录下，
步骤：

1. 先停掉docker服务

sudo service docker stop

2. 更改配置

sudo vim /etc/docker/daemon.json

在里面加一行：

"graph": "/path/you/wanna/save/docker"

{
	"graph": "/bi/docker/imagesAndContainers"
}

3. 重启docker服务

sudo service docker start