1、添加Docker国内源

1.1、安装yum管理工具

$ sudo yum install -y yum-utils  device-mapper-persistent-data lvm2

1.2、安装国内源

$sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

点击链接不能下载，则需要替换其他国内源：
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

2、安装Docker CE

2.1安装docker ce最新版

$ sudo yum install docker-ce docker-ce-cli containerd.io

2.2添加国内镜像创库

修改/etc/docker/daemon.json（没有则创建,有则直接修改）
创建daemon.json（发生过不创建docker文件夹时在vi保存失败,创建docker文件夹mkdir /etc/docker）

$vi /etc/docker/daemon.json

修改daemon.json

{

  "registry-mirrors": ["https://aacfpfx3.mirror.aliyuncs.com","http://registry.docker-cn.com","http://docker.mirrors.ustc.edu.cn","http://hub-mirror.c.163.com"]

}

配置刷新一下

$ sudo systemctl daemon-reload

重启docker生效

$ sudo systemctl restart docker

3、启动docker和设置开机启动

启动

$ sudo systemctl start docker

设置开机启动

$ sudo systemctl enable docker

4、查看docker信息

$ docker info

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 20.10.2
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
 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: runc io.containerd.runc.v2 io.containerd.runtime.v1.linux
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1127.19.1.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 1.795GiB
 Name: VM-8-3-centos
 ID: 64V3:NGZV:CTTC:6U6I:WC3V:3L4D:2SMO:XMX3:QIPJ:ZW2R:6BSV:VPZA
 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://aacfpfx3.mirror.aliyuncs.com/
  http://registry.docker-cn.com/
  http://docker.mirrors.ustc.edu.cn/
  http://hub-mirror.c.163.com/
 Live Restore Enabled: false