一般对于安装软件加速时，我们大多数会选择阿里云，而对于aspnetcore2.0这个进项来说，由于使用的是Debian操作系统，所有我们要找到它对应的mirror列表，下面是我整理的一个sources.list加速列表，我们把它放在和Dockerfile相同的位置，在Dockerfile生成镜像时把它复制到里面去，替换之前的apt-update地址源即可。
source.list内容
deb http://mirrors.aliyun.com/debian wheezy main contrib non-freedeb-src http://mirrors.aliyun.com/debian wheezy main contrib non-freedeb http://mirrors.aliyun.com/debian wheezy-updates main contrib non-freedeb-src http://mirrors.aliyun.com/debian wheezy-updates main contrib non-freedeb http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-freedeb-src http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-free
然后我们对Dockerfile进行一些修改，在生成镜像时把它复制到镜像里
FROM microsoft/aspnetcore:2.0ARG sourceCOPY sources.list /etc/apt/sources.listRUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo ‘Asia/Shanghai‘ >/etc/timezoneRUN apt-get update && apt-get -y install libgdiplusWORKDIR /appEXPOSE 80COPY ${source:-obj/Docker/publish} .ENTRYPOINT ["dotnet", "SMS.dll"]然后我们再去生成镜像，就会非常非常快了！
当然，你也可以不添加这个文件，而直接把文本覆盖到原来的source.list文件里
FROM microsoft/aspnetcore:2.0ARG sourceRUN echo "deb http://mirrors.aliyun.com/debian wheezy main contrib non-free \deb-src http://mirrors.aliyun.com/debian wheezy main contrib non-free \deb http://mirrors.aliyun.com/debian wheezy-updates main contrib non-free \deb-src http://mirrors.aliyun.com/debian wheezy-updates main contrib non-free \deb http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-free \deb-src http://mirrors.aliyun.com/debian-security wheezy/updates main contrib non-free" > /etc/apt/sources.listRUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo ‘Asia/Shanghai‘ >/etc/timezoneRUN apt-get update && ?apt-get install libgdiplus -yWORKDIR /appEXPOSE 80COPY ${source:-obj/Docker/publish} .ENTRYPOINT ["dotnet", "Pilipa.SMS.dll"]上面的做法也是完全没有问题的！
你要是在阿里云服务器上，那就是内网对内网，更快！
docker~aspnetcore2.0镜像安装软件的加速器
原文地址：http://www.cnblogs.com/lori/p/7592554.html