1. 停止docker服务
# systemctl stop docker
2. 修改docker服务启动文件
# vim /etc/systemd/system/multi-user.target.wants/docker.service ExecStart=/usr/bin/dockerd --graph=/docker
3. 重新加载配置并启动
# systemctl daemon-reload # systemctl start docker
4. 检查docker信息
# docker info