卸载旧版本

# yum remove docker  docker-common docker-selinux docker-engine

安装依赖

# yum install -y yum-utils device-mapper-persistent-data lvm2

设置 stable 镜像仓库

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

更新 yum 软件包索引

# yum makecache fast

安装 DOCKER CE

# yum -y install docker-ce

启动 docker

# systemctl start docker

查看docker版本

# docker version

Client: Docker Engine - Community
 Version:           20.10.6
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        370c289
 Built:             Fri Apr  9 22:45:33 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.6
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       8728dd2
  Built:            Fri Apr  9 22:43:57 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.4
  GitCommit:        05f951a3781f4f2c1911b05e61c160e9c30eaa8e
 runc:
  Version:          1.0.0-rc93
  GitCommit:        12644e614e25b05da6fd08a38ffa0cfe1903fdec
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

镜像加速

• 可到阿里云免费申请一个专属加速源

[root@localhost ~]# mkdir -p /etc/docker
[root@localhost ~]# vim /etc/docker/daemon.json
{"registry-mirrors": ["https://3t4p2x0w.mirror.aliyuncs.com"]}
[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl restart docker