step1连接服务器

略

step2安装docker

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

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

yum makecache fast
yum -y install docker-ce

systemctl start docker

step3配置镜像

tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://kqh8****.mirror.aliyuncs.com"]
}
EOF

systemctl daemon-reload

systemctl restart docker

step4第一个服务

docker run --name nginx-test -p 8080:80 -d nginx

你的nginx已经映射到8080端口了噢！