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注意：
如果您不喜欢 sudo，请参阅授予非 root 访问权限。
如果你通过 TCP 使用 macOS 或 docker，那么你不应该使用 sudo。
当你有多个 Docker 服务器，或者构建不能使用 Docker 构建缓存的不相关的 Docker 容器时，为你的包提供一个缓存代理会很有用。这个容器使得任何包的第二次下载几乎是即时的。
使用以下 Dockerfile：
# # Build: docker build -t apt-cacher .# Run: docker run -d -p 3142:3142 --name apt-cacher-run apt-cacher # # and then you can run containers with:# docker run -t -i --rm -e http_proxy http://dockerhost:3142/ debian bash # # Here, `dockerhost` is the IP address or FQDN of a host running the Docker daemon # which acts as an APT proxy server.FROM ubuntu VOLUME ["/var/cache/apt-cacher-ng"]RUN apt-get update && apt-get install -y apt-cacher-ng EXPOSE 3142CMD chmod 777 /var/cache/apt-cacher-ng && /etc/init.d/apt-cacher-ng start && tail -f /var/log/apt-cacher-ng/*
使用以下命令构建图像：
$ docker build -t eg_apt_cacher_ng .
然后运行它，将暴露的端口映射到主机上的端口
$ docker run -d -p 3142:3142 --name test_apt_cacher_ng eg_apt_cacher_ng
要查看tailed默认命令中的日志文件，可以使用：
$ docker logs -f test_apt_cacher_ng
要让您的基于 Debian 的容器使用代理，您有以下选项。请注意，您必须使用运行test_apt_cacher_ng容器的主机的 IP 地址或 FQDN 进行替换dockerhost。
1. 添加一个 apt 代理设置 echo 'Acquire::http { Proxy "http://dockerhost:3142"; };' >> /etc/apt/conf.d/01proxy
2. 设置环境变量：http_proxy=http://dockerhost:3142/
3. 改变你的sources.list条目从http://dockerhost:3142/开始
4. 使用--link将基于 Debian 的容器链接到 APT 代理容器
5. 使用基于 Debian 的容器创建 APT 代理容器的自定义网络。
选项1将设置安全地注入本地通用基础版本的 apt 配置中：
FROM ubuntu
RUN echo 'Acquire::http { Proxy "http://dockerhost:3142"; };' >> /etc/apt/apt.conf.d/01proxy
RUN apt-get update && apt-get install -y vim git
# docker build -t my_ubuntu .选项2是不错的测试，但会破坏其他 HTTP 客户端，其服从http_proxy，比如curl，wget和其他：
$ docker run --rm -t -i -e http_proxy=http://dockerhost:3142/ debian bash
选项3是最不便携的，但有时您可能需要这样做，并且您也可以从Dockerfile中选择。
选项4使用以下命令将 Debian 容器链接到代理服务器：
$ docker run -i -t --link test_apt_cacher_ng:apt_proxy -e http_proxy=http://apt_proxy:3142/ debian bash
选项5创建了一个 APT 代理服务器和基于 Debian 的容器的自定义网络：
$ docker network create mynetwork $ docker run -d -p 3142:3142 --network=mynetwork --name test_apt_cacher_ng eg_apt_cacher_ng $ docker run --rm -it --network=mynetwork -e http_proxy=http://test_apt_cacher_ng:3142/ debian bash
Apt-cacher-ng 有一些工具可以让您管理存储库，并且可以通过利用VOLUME指令和我们构建的用于运行服务的映像来使用它们：
$ docker run --rm -t -i --volumes-from test_apt_cacher_ng eg_apt_cacher_ng bash root@f38c87f2a42d:/# /usr/lib/apt-cacher-ng/distkill.pl Scanning /var/cache/apt-cacher-ng, please wait...Found distributions:bla, taggedcount: 0 1. precise-security (36 index files) 2. wheezy (25 index files) 3. precise-updates (36 index files) 4. precise (36 index files) 5. wheezy-updates (18 index files)Found architectures: 6. amd64 (36 index files) 7. i386 (24 index files)WARNING: The removal action may wipe out whole directories containing index files. Select d to see detailed list.(Number nn: tag distribution or architecture nn; 0: exit; d: show details; r: remove tagged; q: quit): q
最后，通过停止并取出容器，然后移除图像，在测试后清理。
$ docker stop test_apt_cacher_ng $ docker rm test_apt_cacher_ng $ docker rmi eg_apt_cacher_ng