搭建powerdns
github官方：
https://github.com/PowerDNS/pdns
构建镜像：
git clone https://github.com/PowerDNS/pdns.git
cd pdns
rmdir builder
git clone https://github.com/PowerDNS/pdns-builder.git
#修改基础镜像的debian源为阿里云的源，解决构建时候太慢的问题
awk '/^FROM debian:/ {print; print "RUN sed -i \'s@deb.debian.org@mirrors.aliyun.com@g\' /etc/apt/sources.list"; print "RUN sed -i \'s@security.debian.org@mirrors.aliyun.com@g\' /etc/apt/sources.list"; next}1' Dockerfile-*