Docker 默认安装位置迁移

一、找到 Docker 默认安装位置

powershell 复制代码

[root@host-192-168-0-1 ~]# docker info
Client:
 Version:    26.1.0
 Context:    default
 Debug Mode: false

Server:
 Containers: 31
  Running: 31
  Paused: 0
  Stopped: 0
 Images: 128
 Server Version: 26.1.0
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Using metacopy: false
  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 splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 926c9586fe4a6236699318391cd44976a98e31f1
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 4.19.90-52.22.v2207.ky10.x86_64
 Operating System: Kylin Linux Advanced Server V10 (Lance)
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 30.1GiB
 Name: host-192-173-32-120
 ID: 5e427e0b-c772-4045-90a2-59c5cba6a03b
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://dockerproxy.com/
  https://registry.docker-cn.com/
 Live Restore Enabled: false
 Product License: Community Engine

其中 Docker Root Dir: /var/lib/docker 就是安装目录

二、创建或修改 daemon.json 配置文件

vim /etc/docker/daemon.json

powershell 复制代码

{
"registry-mirrors": [
	"https://dockerproxy.com",
	"https://registry.docker-cn.com"
],
"data-root": "/opt/data/docker"  # 填写你想迁移过去的文件夹路径
}

注意：json文件中参数名前面的空格一定要用制表符，不要用4个空格，否则后面docker服务启动会失败！

三、将默认安装路径下的文件复制到将要迁移的文件夹下

powershell 复制代码

systemctl stop docker

# 这里要用 /opt/data 而不是 /opt/data/docker 是因为复制过去会自动生成一个 docker 文件夹
cp -ar /var/lib/docker /opt/data

注意：拷贝数据时，要拷贝权限关系，直接 cp -r 可能导致部分容器无法启动，显示权限不足等

四、重启服务

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systemctl daemon-reload && systemctl restart docker

五、验证结果，删除原目录

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[root@host-192-168-0-1 ~]# docker info | grep Root
 Docker Root Dir: /opt/data/docker

powershell 复制代码

rm -rf /var/lib/docker