1.下载aliyun的docker-ce源
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

2.docker安装
yum install docker-ce -y

3.docker启动服务
systemctl start docker
systemctl enable docker
systemctl status docker
4.配置docker镜像加速器

针对Docker客户端版本大于 1.10.0 的用户
您可以通过修改daemon配置文件/etc/docker/daemon.json来使用加速器

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://780urbjd.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

5.docker安装运行PHP7.3
docker pull php:7.3-fpm