迁移变更Docker默认数据存储目录的步骤详解

# 首先查看一下各目录磁盘空间大小，便于设置docker数据目录路径
[root@two harbor-2.9.1]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                  19G     0   19G   0% /dev
tmpfs                     19G     0   19G   0% /dev/shm
tmpfs                     19G   33M   19G   1% /run
tmpfs                     19G     0   19G   0% /sys/fs/cgroup
/dev/mapper/centos-root   50G   12G   39G  23% /
/dev/sda1               1014M  196M  819M  20% /boot
/dev/mapper/centos-home  2.6T  2.7G  2.6T   1% /home
tmpfs                    3.8G     0  3.8G   0% /run/user/1000

systemctl stop docker.socket
systemctl stop docker.service

mkdir -p /home/docker/data

yum install rsync -y

rsync -avzP /var/lib/docker /home/docker/data

# 配置 docker 镜像代理及数据存储目录
[root@two docker24.0.4-offline-install]# mkdir -p /etc/docker
[root@two docker24.0.4-offline-install]# vim /etc/docker/daemon.json

{
    ......
    "data-root": "/home/docker/data",
    ......
}

systemctl daemon-reload
systemctl start docker

docker ps -a

rm -rf /var/lib/docker