linux下使用Dockerfile安装jenkins碰到的问题（debian源，下载Docker Compose超时）

今天参考晓晨Master大神的文章https://www.cnblogs.com/stulzq/p/8627360.html，在一台Linux主机使用Dockerfile安装jenkins.

碰到两个坑，在此记录一下：

1.我使用的是阿里云的debian源，所以Dockerfile是这样的：
 

FROM jenkins

USER root
#清除了基础镜像设置的源，切换成腾讯云的jessie源
#使用非腾讯云环境的需要将 tencentyun 改为 aliyun
RUN echo '' > /etc/apt/sources.list.d/jessie-backports.list \
  && echo "deb http://mirrors.aliyun.com/debian/ jessie main non-free contrib" > /etc/apt/sources.list \
  && echo "deb http://mirrors.aliyun.com/debian/ jessie-updates main non-free contrib" >> /etc/apt/sources.list \
  && echo "deb http://mirrors.aliyun.com/debian-security/ jessie/updates main non-free contrib" >> /etc/apt/sources.list
#更新源并安装缺少的包
RUN apt-get update && apt-get install -y libltdl7 && apt-get update

ARG dockerGid=999

RUN echo "docker:x:${dockerGid}:jenkins" >> /etc/group

# 安装 docker-compose 因为等下构建环境的需要
RUN curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

RUN chmod +x /usr/local/bin/docker-compose

2.执行构建：docker build . -t auto-jenkins，碰到下载Docker Compose超时的问题。

Failed to connect to github-production-release-asset-2e65be.s3.amazonaws.com port 443: Connection timed out

原因是地址被墙，需要在linux的/etc/hosts上配置HOST。我ping github-production-release-asset-2e65be.s3.amazonaws.com得到IP为52.216.16.72。

在linux上运行：vim /etc/hosts，增加：

52.216.16.72 github-production-release-asset-2e65be.s3.amazonaws.com

修改完后再次执行构建即可。

感谢晓晨Master大神的文章！