linux docker 数据目录迁移

step 1: 查看docker原文件目录，并停掉docker 服务

[root@tcq-gdyt docker]# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Docker Buildx (Docker Inc., v0.9.1-docker)
  scan: Docker Scan (Docker Inc., v0.21.0)

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 2
 Server Version: 20.10.21
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 1c90a442489720eec95342e1789ee8a5e1b9536f
 runc version: v1.1.4-0-g5fd4c4d
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1127.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 4
 Total Memory: 7.795GiB
 Name: tcq-gdyt.grgit.com
 ID: QN6B:LBRO:ILLU:7Z7Y:RFKW:RKCM:VCHN:R5F5:4IZ6:FRHS:LJJ5:5G5A
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://qfq51k37.mirror.aliyuncs.com/
 Live Restore Enabled: false

停掉服务

service docker stop

step2: 创建新的存储位置 

mkdir -p /home/dockerRoot

　将数据复制到新目录

cp -a /var/lib/docker /home/dockerRoot/

备份原目录

mv -u /var/lib/docker/ /var/lib/docker.bak

step3:修改配置文件

vim /etc/docker/paemon.json

{
  "registry-mirrors": ["https://你只自己的.mirror.aliyuncs.com"],
  "data-root":"/home/dockerRooot/docker"
}

 step4:重启docker

service docker start

查看是否修改成功

docker info
查看 docker root dir