现在位置: 首页 / Devops专题 / 正文

Docker专题-05 搭建镜像加速服务

Docker专题-05 搭建镜像加速服务

注：

  • 本教程由羞涩梦整理同步发布，本人技术分享站点：blog.hukanfa.com
  • 转发本文请备注原文链接，本文内容整理日期：2024-06-19
  • csdn 博客名称：五维空间-影子，欢迎关注

  • 说明

    • 由于最新的政策管控，国内所有 DockerHub 镜像加速服务商都停止服务，急需替代方案
    • 本章将介绍如何通过Cloudflare 提供的免费 Worker 服务来搭建属于自己的镜像加速服务
    • 如需获取本人提供的加速域名请前往个人博客blog.hukanfa.com 阅读本文，也可自行按照下面步骤配置

1 前置准备

  • 操作如下
    • 注册新域名，如本人以自己名字在云厂商注册了.cn域名
    • 创建 Cloudflare账号
    # 官网地址，选择免费计划（Free Plans）即可
https://dash.cloudflare.com/login

    image-20240618203604318

2 站点配置

  • 操作如下
    • 登录 Cloudflare 账号，进入到主页，点击网站，添加站点 xxx.cn

    image-20240618204618678

    • 激活站点：站点配置完成后，界面会显示对应区域名称服务器地址，然后更新新注册域名的ns地址稍等会即可自动检测激活

    image-20240618205033938

    image-20240618205247506

3 Workers配置

  • 操作如下
    • 回到 Cloudflare 主页，点击Workers 和 Pages，然后创建应用程序，命名如Hub, 按照提示点击完成即可

    image-20240618210029623

    • 创建完成后，点击hub进入到项目业中，再点击编辑代码，将代码替换为如下内容，并且保存即可

    image-20240619095917148

    image-20240619100018135

    'use strict'
const hub_host = 'registry-1.docker.io'
const auth_url = 'https://auth.docker.io'
// 请将 hub.xxx.cn 替换为自己的域名
const workers_url = 'https://hub.xxx.cn'
const PREFLIGHT_INIT = {
  status: 204,
  headers: new Headers({
      'access-control-allow-origin': '*',
      'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS',
      'access-control-max-age': '1728000',
  }),
}
function makeRes(body, status = 200, headers = {}) {
  headers['access-control-allow-origin'] = '*'
  return new Response(body, {status, headers})
}
function newUrl(urlStr) {
  try {
      return new URL(urlStr)
  } catch (err) {
      return null
  }
}
addEventListener('fetch', e => {
  const ret = fetchHandler(e)
      .catch(err => makeRes('cfworker error:\n' + err.stack, 502))
  e.respondWith(ret)
})
async function fetchHandler(e) {
const getReqHeader = (key) => e.request.headers.get(key);
let url = new URL(e.request.url);
if (url.pathname === '/token') {
    let token_parameter = {
      headers: {
      'Host': 'auth.docker.io',
      'User-Agent': getReqHeader("User-Agent"),
      'Accept': getReqHeader("Accept"),
      'Accept-Language': getReqHeader("Accept-Language"),
      'Accept-Encoding': getReqHeader("Accept-Encoding"),
      'Connection': 'keep-alive',
      'Cache-Control': 'max-age=0'
      }
    };
    let token_url = auth_url + url.pathname + url.search
    return fetch(new Request(token_url, e.request), token_parameter)
}
url.hostname = hub_host;
let parameter = {
  headers: {
    'Host': hub_host,
    'User-Agent': getReqHeader("User-Agent"),
    'Accept': getReqHeader("Accept"),
    'Accept-Language': getReqHeader("Accept-Language"),
    'Accept-Encoding': getReqHeader("Accept-Encoding"),
    'Connection': 'keep-alive',
    'Cache-Control': 'max-age=0'
  },
  cacheTtl: 3600
};
if (e.request.headers.has("Authorization")) {
  parameter.headers.Authorization = getReqHeader("Authorization");
}
let original_response = await fetch(new Request(url, e.request), parameter)
let original_response_clone = original_response.clone();
let original_text = original_response_clone.body;
let response_headers = original_response.headers;
let new_response_headers = new Headers(response_headers);
let status = original_response.status;
if (new_response_headers.get("Www-Authenticate")) {
  let auth = new_response_headers.get("Www-Authenticate");
  let re = new RegExp(auth_url, 'g');
  new_response_headers.set("Www-Authenticate", response_headers.get("Www-Authenticate").replace(re, workers_url));
}
if (new_response_headers.get("Location")) {
  return httpHandler(e.request, new_response_headers.get("Location"))
}
let response = new Response(original_text, {
          status,
          headers: new_response_headers
      })
return response;
}
function httpHandler(req, pathname) {
  const reqHdrRaw = req.headers
  // preflight
  if (req.method === 'OPTIONS' &&
      reqHdrRaw.has('access-control-request-headers')
  ) {
      return new Response(null, PREFLIGHT_INIT)
  }
  let rawLen = ''
  const reqHdrNew = new Headers(reqHdrRaw)
  const refer = reqHdrNew.get('referer')
  let urlStr = pathname
  const urlObj = newUrl(urlStr)
  /** @type {RequestInit} */
  const reqInit = {
      method: req.method,
      headers: reqHdrNew,
      redirect: 'follow',
      body: req.body
  }
  return proxy(urlObj, reqInit, rawLen, 0)
}
async function proxy(urlObj, reqInit, rawLen) {
  const res = await fetch(urlObj.href, reqInit)
  const resHdrOld = res.headers
  const resHdrNew = new Headers(resHdrOld)
  // verify
  if (rawLen) {
      const newLen = resHdrOld.get('content-length') || ''
      const badLen = (rawLen !== newLen)
      if (badLen) {
          return makeRes(res.body, 400, {
              '--error': `bad len: {newLen}, except:{rawLen}`,
              'access-control-expose-headers': '--error',
          })
      }
  }
  const status = res.status
  resHdrNew.set('access-control-expose-headers', '*')
  resHdrNew.set('access-control-allow-origin', '*')
  resHdrNew.set('Cache-Control', 'max-age=1500')
  resHdrNew.delete('content-security-policy')
  resHdrNew.delete('content-security-policy-report-only')
  resHdrNew.delete('clear-site-data')
  return new Response(res.body, {
      status,
      headers: resHdrNew
  })
}
    • 点击右上角的部署即可完成部署，然后回到 hub 项目页，点击设置，点击触发器，再点击添加路由
    # 输入 hub.xxx.cn/* 路由（注意末尾的/*是不可缺少的），区域选择前面添加的 xxx.cn 即可

    image-20240619100430389

4 Dns解析

  • 操作如下
    • 回到 Cloudflare主页，点击前面添加的xxx.cn域名，点击设置，点击DNS，点击添加A记录
    设置名称为hub，地址为8.8.8.8（随意填），但是一定要启用代理

    • 配置完成后，执行下述命令验证站点是否正常拉取如nginx:latest镜像
    # 官方
docker pull docker.io/library/nginx:latest
# 自建
docker pull hub.hukanfa.cn/library/nginx:latest
# 最后可将该域名配置到 /etc/docker/daemon.json 文件中作为镜像加速器
{
"registry-mirrors": ["https://hub.hukanfa.cn"],
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore":true,
"log-driver": "json-file",
"log-opts": {
"max-size": "100m",
"max-file": "3"
},
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 10
}
# 重载配置并重启docker
systemctl daemon-reload
systemctl restart docker