github里着重讲了buildah和podman的区别：
buildah对标的是dockerfile的脚本化代替执行。
podman对标的是docker命令的代替。
gihub地址：
https://github.com/containers/buildah
感性体验：
$ cat > lighttpd.sh <<"EOF"
#!/bin/bash -x
ctr1=$(buildah from "${1:-fedora}")
## Get all updates and install our minimal httpd server
buildah run "$ctr1" -- dnf update -y
buildah run "$ctr1" -- dnf install -y lighttpd
## Include some buildtime annotations
buildah config --annotation "com.example.build.host=$(uname -n)" "$ctr1"
## Run our server and expose the port
buildah config --cmd "/usr/sbin/lighttpd -D -f /etc/lighttpd/lighttpd.conf" "$ctr1"
buildah config --port "$ctr1"
## Commit this container to an image name
buildah commit "$ctr1" "${2:-$USER/lighttpd}"
EOF
$ chmod +x lighttpd.sh
$ sudo ./lighttpd.sh