Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.

先卸载podman和docker 然后重新安装

yum install https://download.docker.com/linux/centos/8/x86_64/stable/Packages/containerd.io-1.4.3-3.1.el8.x86_64.rpm --allowerasing
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce 
systemctl start docker