1. 注意
centos8默认使用podman代替docker，但是当前还是需要docker，
执行yum install docker-ce docker-ce-cli containerd.io，
会报错Problem: package docker-ce-3:19.03.3-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
2.安装依赖
yum install -y yum-utils device-mapper-persistent-data lvm2
3.添加yum仓库
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum makecache
4.安装docker-ce
dnf -y install docker-ce --nobest
5.docker开机自启
systemctl enable --now docker
6.添加当前用户到docker group
usermod -aG docker $USER
newgrp docker
