一些好用的国内镜像

http://mirrors.sohu.com/nginx/

https://mirrors.cnnic.cn/

https://ftp.pcre.org/pub/pcre/

https://repo.huaweicloud.com/java/jdk/

docker加速镜像拉取： daocloud.io/library

如docker安装mysql: docker pull daocloud.io/library/mysql