安装

按照docker官网，先卸载旧的版本

yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

下载需要的安装包

yum install -y yum-utils

设置仓库的镜像

yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo  #国外的地址
    
    # 设置阿里云的Docker镜像仓库
yum-config-manager \
    --add-repo \
    https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo  #国外的地址

更新yum软件包索引

yum makecache fast

安装Docker引擎

docker-ce 是社区版，docker-ee 企业版

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

启动

systemctl start docker
# 查看当前版本号，是否启动成功
[root@iZm5e3zk8pqk27ssml4nblZ local]# docker version
Client: Docker Engine - Community
 Version:           20.10.12
 API version:       1.41
 Go version:        go1.16.12
 Git commit:        e91ed57
 Built:             Mon Dec 13 11:45:41 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.12
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.12
  Git commit:       459d0df
  Built:            Mon Dec 13 11:44:05 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.12
  GitCommit:        7b11cfaabd73bb80907dd23182b9347b4245eb5d
 runc:
  Version:          1.0.2
  GitCommit:        v1.0.2-0-g52b36a2
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
  
# 设置开机自启动
systemctl enable docker

Hello-World

下载hello-world镜像进行测试

docker run hello-world

配置阿里云镜像加速

依次执行以下命令

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://eam6hxcr.mirror.aliyuncs.com"]
}
EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

卸载Docker

# 1. 卸载依赖
yum remove docker-ce docker-ce-cli containerd.io
# 2. 删除资源  . /var/lib/docker是docker的默认工作路径
rm -rf /var/lib/docker