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¶前言
闲来无聊,在家折腾 DevOps第一步当然是部署一个 Jenkin,">
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二月 21, 2020
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<h3 class="post-title animated fadeInDown"><a href="/jenkins-update-solution-inside-gfw/" title="墙内 Jenkins 插件下载的一种解决方案" class="">墙内 Jenkins 插件下载的一种解决方案</a>
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<p>原创发表于 <a href="https://blog.davidz.cn">DavidZ Blog</a>,遵循 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode" target="_blank" rel="noopener">CC 4.0 BY-NC-SA</a> 版权协议,转载请附上原文出处链接及本声明。</p>
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<h2 id="前言"><a class="header-anchor" href="#前言"></a>前言</h2>
<p>闲来无聊,在家折腾 DevOps第一步当然是部署一个 Jenkins 啦,然而一顿操作猛如虎,插件一个都下载不下来,总不能给 Jenkins 加个代理吧,所以有了下面这一通折腾。</p>
<h2 id="原因"><a class="header-anchor" href="#原因"></a>原因</h2>
<p><img src="//davidz.cn/static/blog/2020-02-21-jenkins-update-solution-inside-gfw/intro.png" alt="下载超时"></p>
<p>根据经验,国外这些软件下载失败基本上都是因为链接不上服务器,换个源就好了。所以简单百度,找到大量相关教程,换了<a href="https://mirrors.tuna.tsinghua.edu.cn/" target="_blank" rel="noopener">清华源</a>在内的四五个镜像源,均无效。</p>
<p>这就非常奇怪了,所以我打开了清华源的<a href="https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json" target="_blank" rel="noopener">update-center.json</a>,仔细看了看,发现了蹊跷之处。原来,这个文件里面基本上所有插件的链接都指向了官网链接<code>http://updates.jenkins-ci.org/download/plugins/</code>。所以我们使用<code>https://mirrors.tuna.tsinghua.edu.cn/jenkins/updates/update-center.json</code>只加速了下载这个文件的过程,而并没有加速下载插件的过程。</p>
<h2 id="解决方案"><a class="header-anchor" href="#解决方案"></a>解决方案</h2>
<p>那么解决方案就很简单了,我们只需要把<code>/var/jenkins_home/updates/default.json</code>这个文件中的所有</p>
<pre><code class="language-htmlmixed">http://updates.jenkins-ci.org/download/plugins/
</code></pre>
<p>替换成,</p>
<pre><code class="language-htmlmixed">https://mirrors.tuna.tsinghua.edu.cn/jenkins/plugins/
</code></pre>
<p>这样就好啦,但是总不能每次都自己手动替换吧,所以有下面这两个稍微复杂一点的自动化解决方案。</p>
<h3 id="方案-1-使用-nginx-重定向"><a class="header-anchor" href="#方案-1-使用-nginx-重定向"></a>方案 1 使用 nginx 重定向</h3>
<p>这个方法是参考的<a href="https://my.oschina.net/VASKS/blog/3106314" target="_blank" rel="noopener">jenkins 插件下载加速最终方案</a></p>
<p>具体我没有试,但是我之前写过 Nginx 的重定向,简单来讲就是遇到官方的地址,就重定向到清华源,配置起来稍微复杂一点。</p>
<h3 id="方案-2-自己搭建-Jenkins-Update-Center"><a class="header-anchor" href="#方案-2-自己搭建-Jenkins-Update-Center"></a>方案 2 自己搭建 Jenkins Update Center</h3>
<p>这个是我自己尝试出来的,原理就是我在服务器上定时(每小时)从清华源下载<code>update-center.json</code>,然后再把里面的 URL 替换成正确的地址,然后对外提供服务。</p>
<p>但是 Jenkins 对于<code>update-center.json</code>的地址有验证,<a href="https://github.com/jenkins-zh/mirror-adapter" target="_blank" rel="noopener">具体验证方法</a>不清楚(<s>我实在是懒的研究了</s>)。</p>
<blockquote>
<p>山重水复疑无路,柳暗花明又一村</p>
</blockquote>
<p>我在 Jenkins 的 Issue 里面找到一个<a href="https://issues.jenkins-ci.org/browse/JENKINS-11598?focusedCommentId=212431&amp;page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-212431" target="_blank" rel="noopener">老哥</a>说验证这个功能可以通过属性参数关闭,于是,这个问题就很简单啦。</p>
<pre><code class="language-shell">hudson.model.DownloadService.noSignatureCheck=true
</code></pre>
<p>加上这个属性就好啦。</p>
<p><a href="https://jenkins-update.davidz.cn/" target="_blank" rel="noopener">具体教程</a></p>
<p>哈,插件全秒!😄</p>
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