docker build 前修改 ubuntu 基础源

docker build 默认使用的是官方源。使用ubuntu官方源不但速度慢并且有的源地址没法访问致使出错。

以 build 官方文档示例 mydockerbuild 为例：

FROM docker/whalesay:latest

RUN apt-get -y update && apt-get install -y fortunes

CMD /usr/games/fortune -a | cowsay

docker build -t docker-whale .

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/main/source/Sources  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/universe/source/Sources  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/universe/source/Sources  Hash Sum mismatch

修改 Dockerfile 文件，构建以前替换为网易的源

FROM docker/whalesay:latest

RUN sed -i 's/http:\/\/archive\.ubuntu\.com\/ubuntu\//http:\/\/mirrors\.163\.com\/ubuntu\//g' /etc/apt/sources.list

RUN apt-get -y update && apt-get install -y fortunes

CMD /usr/games/fortune -a | cowsay

参考：

Docker构建的时候执行网络请求很慢