Docker默认的根目录（也称为 Docker数据目录）是/var/lib/docker，这个目录用于存储 Docker 容器、镜像、卷和网络的数据…

m1磁盘满了(/var/lib/docker)

1、df -h查看磁盘接近100%

2、迁移磁盘位置

2.1、停止docker 移动到存在的目录并且空间足够大
systemctl stop docker

2.2、软连接
mv /var/lib/docker /devdata/
ln -s /devdata/docker/ /var/lib/

2.3、重启docker
systemctl restart docker

m2移动目录非软链接形式

1.查看
[root@cloudos-51 localvolume]# docker info | grep "Docker Root Dir"
 Docker Root Dir: /var/lib/docker

2.停止docker
systemctl stop docker

3.打包移动修改root路径
tar -czvf docker-backup.tar.gz /var/lib/docker

tar -xzvf docker-backup.tar.gz -C /

4.修改docker启动命令

--data-root 或 -g 选项来指定新的路径
dockerd -g /path/to/new/root

[root@cloudos-51 localvolume]# cat /usr/lib/systemd/system/docker.service
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd   -g /path/to/new/root
...

5.启动docker
systemctl daemon-reload && systemctl start docker