文章参考：如何使用 Cloudflare Workers 自建 Docker 镜像代理 | 小王爷 (xiaowangye.org)
一、前期需要
- 新注册一个域名（要改DNS 服务器，用国内的影响正常业务，如果你本来就有闲置的就直接用），所以最好用国外的域名商，选个便宜的
- Cloudflare 账号
域名方面，我选择在https://www.namesilo.com/注册了一个纯数字的.xyz的域名，目前新开和续费都是1刀乐，比较划算，我一次性开了五年。注意域名付款后记得验证邮箱。
之后在Cloudflare的网站界面，将域名添加进去，会显示一个分配的DNS服务器：
在namesilo的域名管理里可以快速设置DNS服务器，把Cloudflare分配的DNS服务器填进去：
二、创建 Worker
在 Cloudflare 创建一个 Worker，如命名为 docker，然后将以下代码粘贴到 Worker 中，并点击部署：
注意把代码里面的dp.410006.xyz 修改为你的域名，只有一处需要修改的。这个域名要跟第三步添加的自定义域名保持一致。addEventListener("fetch", (event) => {
event.passThroughOnException();
event.respondWith(handleRequest(event.request));
});
const dockerHub = "https://registry-1.docker.io";
const HTML = `
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="shortcut icon" href="https://xiaowangye.org/assets/img/favicons/favicon.ico">
<title>Docker 镜像代理使用说明</title>
<style>
body {
font-family: 'Roboto', sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f4;
}
.header {
background: linear-gradient(135deg, #667eea, #764ba2);
color: #fff;
padding: 20px 0;
text-align: center;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.container {
max-width: 800px;
margin: 40px auto;
padding: 20px;
background-color: #fff;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
border-radius: 10px;
}
.content {
margin-bottom: 20px;
}
.footer {
text-align: center;
padding: 20px 0;
background-color: #333;
color: #fff;
}
pre {
background-color: #272822;
color: #f8f8f2;
padding: 15px;
border-radius: 5px;
overflow-x: auto;
}
code {
font-family: 'Source Code Pro', monospace;
}
a {
font-weight: bold;
color: #ffffff;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
@media (max-width: 600px) {
.container {
margin: 20px;
padding: 15px;
}
.header {
padding: 15px 0;
}
}
</style>
<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&family=Source+Code+Pro:wght@400;700&display=swap" rel="stylesheet">
</head>
<body>
<div class="header">
<h1>Docker 镜像代理使用说明</h1>
</div>
<div class="container">
<div class="content">
<h3>带镜像仓库地址使用说明</h3>
<p>1.拉取镜像</p>
<pre><code># 拉取 redis 官方镜像（不带命名空间）
docker pull {:host}/redis
# 拉取 rabbitmq 官方镜像
docker pull {:host}/library/rabbitmq
# 拉取 postgresql 非官方镜像
docker pull {:host}/bitnami/postgresql</code></pre><p>2.重命名镜像</p>
<pre><code># 重命名 redis 镜像
docker tag {:host}/library/redis redis
# 重命名 postgresql 镜像
docker tag {:host}/bitnami/postgresql bitnami/postgresql</code></pre><h3>镜像源方式使用说明</h3><p>1.添加镜像源</p>
<pre><code># 添加镜像代理到 Docker 镜像源
sudo tee /etc/docker/daemon.json << EOF
{
"registry-mirrors": ["https://{:host}"]
}
EOF</code></pre><p>2.拉取镜像</p>
<pre><code># 拉取 redis 官方镜像
docker pull redis
# 拉取 rabbitmq 非官方镜像
docker pull bitnami/rabbitmq
# 拉取 postgresql 官方镜像
docker pull postgresql</code></pre>
</div>
</div>
<div class="footer">
<p>©2024 <a href="https://xiaowangye.org">xiaowangye.org</a>. All rights reserved. Powered by <a href="https://cloudflare.com">Cloudflare</a>.</p>
</div>
</body>
</html>
`
const routes = {
// 替换为你的域名
"dp.410006.xyz": dockerHub,
};
function routeByHosts(host) {
if (host in routes) {
return routes[host];
}
return "";
}
async function handleRequest(request) {
const url = new URL(request.url);
if (url.pathname == "/") {
return handleHomeRequest(url.host);
}
const upstream = routeByHosts(url.hostname);
if (!upstream) {
return createNotFoundResponse(routes);
}
const isDockerHub = upstream == dockerHub;
const authorization = request.headers.get("Authorization");
if (url.pathname == "/v2/") {
return handleFirstRequest(upstream, authorization, url.hostname);
}
// get token
if (url.pathname == "/v2/auth") {
return handleAuthRequest(upstream, url, isDockerHub, authorization);
}
// redirect for DockerHub library images
// Example: /v2/busybox/manifests/latest => /v2/library/busybox/manifests/latest
if (isDockerHub) {
const pathParts = url.pathname.split("/");
if (pathParts.length == 5) {
pathParts.splice(2, 0, "library");
const redirectUrl = new URL(url);
redirectUrl.pathname = pathParts.join("/");
return Response.redirect(redirectUrl.toString(), 301);
}
}
return handlePullRequest(upstream, request);
}
function parseAuthenticate(authenticateStr) {
// sample: Bearer realm="https://auth.ipv6.docker.com/token",service="registry.docker.io"
// match strings after =" and before "
const re = /(?<=\=")(?:\\.|[^"\\])*(?=")/g;
const matches = authenticateStr.match(re);
if (matches == null || matches.length < 2) {
throw new Error(`invalid Www-Authenticate Header: ${authenticateStr}`);
}
return {
realm: matches[0],
service: matches[1],
};
}
async function fetchToken(wwwAuthenticate, scope, authorization) {
const url = new URL(wwwAuthenticate.realm);
if (wwwAuthenticate.service.length) {
url.searchParams.set("service", wwwAuthenticate.service);
}
if (scope) {
url.searchParams.set("scope", scope);
}
const headers = new Headers();
if (authorization) {
headers.set("Authorization", authorization);
}
return await fetch(url, { method: "GET", headers: headers });
}
function handleHomeRequest(host) {
return new Response(HTML.replace(/{:host}/g, host), {
status: 200,
headers: {
"content-type": "text/html",
}
})
}
async function handlePullRequest(upstream, request) {
const url = new URL(request.url);
const newUrl = new URL(upstream + url.pathname);
const newReq = new Request(newUrl, {
method: request.method,
headers: request.headers,
redirect: "follow",
});
return await fetch(newReq);
}
async function handleFirstRequest(upstream, authorization, hostname) {
const newUrl = new URL(upstream + "/v2/");
const headers = new Headers();
if (authorization) {
headers.set("Authorization", authorization);
}
// check if need to authenticate
const resp = await fetch(newUrl.toString(), {
method: "GET",
headers: headers,
redirect: "follow",
});
if (resp.status === 401) {
headers.set(
"Www-Authenticate",
`Bearer realm="https://${hostname}/v2/auth",service="cloudflare-docker-proxy"`
);
return new Response(JSON.stringify({ message: "Unauthorized" }), {
status: 401,
headers: headers,
});
} else {
return resp;
}
}
async function handleAuthRequest(upstream, url, isDockerHub, authorization) {
const newUrl = new URL(upstream + "/v2/");
const resp = await fetch(newUrl.toString(), {
method: "GET",
redirect: "follow",
});
if (resp.status !== 401) {
return resp;
}
const authenticateStr = resp.headers.get("WWW-Authenticate");
if (authenticateStr === null) {
return resp;
}
const wwwAuthenticate = parseAuthenticate(authenticateStr);
let scope = url.searchParams.get("scope");
// autocomplete repo part into scope for DockerHub library images
// Example: repository:busybox:pull => repository:library/busybox:pull
if (scope && isDockerHub) {
let scopeParts = scope.split(":");
if (scopeParts.length == 3 && !scopeParts[1].includes("/")) {
scopeParts[1] = "library/" + scopeParts[1];
scope = scopeParts.join(":");
}
}
return await fetchToken(wwwAuthenticate, scope, authorization);
}
const createNotFoundResponse = (routes) => new Response(
JSON.stringify({ routes }),
{
status: 404,
headers: {
"Content-Type": "application/json",
},
}
);三、 绑定域名
点击 docker 进入 Worker 页面，点击 设置 > 触发器 > 添加自定义域，输入你要绑定的域名，等待创建完成，如下图所示：
四、访问镜像代理首页
访问域名dp.410006.xyz，可查看镜像代理的使用说明：
五、更换docker镜像源
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://上面填好的域名"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker