mkdir /data/docker

systemctl stop docker

vi /usr/lib/systemd/system/docker.service

/usr/lib/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=http://docs.docker.com

After=network.target rhel-push-plugin.socket registries.service

Wants=docker-storage-setup.service

Requires=docker-cleanup.timer

[Service]

Type=notify

NotifyAccess=all

EnvironmentFile=-/run/containers/registries.conf

EnvironmentFile=-/etc/sysconfig/docker

EnvironmentFile=-/etc/sysconfig/docker-storage

EnvironmentFile=-/etc/sysconfig/docker-network

Environment=GOTRACEBACK=crash

Environment=DOCKER_HTTP_HOST_COMPAT=

Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin

ExecStart=/usr/bin/dockerd-current -g /data/docker \

          --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current \

          --default-runtime=docker-runc \

          --exec-opt native.cgroupdriver=systemd \

          --userland-proxy-path=/usr/libexec/docker/docker-proxy-current \

          --init-path=/usr/libexec/docker/docker-init-current \

          --seccomp-profile=/etc/docker/seccomp.json \

          $OPTIONS \

          $DOCKER_STORAGE_OPTIONS \

          $DOCKER_NETWORK_OPTIONS \

          $ADD_REGISTRY \

          $BLOCK_REGISTRY \

          $INSECURE_REGISTRY \

  $REGISTRIES

ExecReload=/bin/kill -s HUP $MAINPID

LimitNOFILE=

LimitNPROC=

LimitCORE=infinity

TimeoutStartSec=

Restart=on-abnormal

KillMode=process

[Install]

WantedBy=multi-user.target

cp -R /var/lib/docker/* /data/docker/ 

systemctl daemon-reload

systemctl start docker