docker修改默认存储路径

第一种方式：

一、环境：
centos7.x系统，已经装好docker-ce服务包

二、查看当前docker的存储路径

[yukw@yfb ~]$ docker info |grep Dir
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
WARNING: the devicemapper storage-driver is deprecated, and will be removed in a future release.
WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
         Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
 Docker Root Dir: /var/lib/docker              ## docker默认的存储路径

三、关闭docker服务

[yukw@yfb ~]$ sudo -s                             ## 切换到root用户
[sudo] password for yukw:
[root@yfb yukw]# systemctl stop docker            ## 关闭docker服务
[root@yfb yukw]# systemctl status docker		  ## 查看docker服务状态

四、将原有数据迁移至新目录（这是在docker服务启动后需要做的操作，因为启动后docker默认会将数据存储在 /var/lib/docker/目录下）

[root@yfb yukw]# mkdir /data/service/docker -p
[root@yfb yukw]# mv /var/lib/docker/* /data/service/docker/

五、修改docker.service配置文件，使用 --graph 参数指定存储位置

[root@yfb yukw]# vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --graph /data/service/docker

六、重新加载配置文件

[root@yfb yukw]# systemctl daemon-reload

七、启动docker服务

[root@yfb yukw]# systemctl start docker
[root@yfb yukw]# systemctl enable docker
[root@yfb yukw]# systemctl status docker

八、查看修改是否成功

[yukw@yfb ~]$ docker info | grep Dir
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
WARNING: the devicemapper storage-driver is deprecated, and will be removed in a future release.
WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
         Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
 Docker Root Dir: /data/service/docker                ## 查看修改成功

第二种方式：

# mkdir /etc/docker/
# vim /etc/docker/daemon.json

好了，这就是修改docker默认存储路径的方法，如有问题可与博主交流讨论！