https://www.tainuohc.com/en/categories/ci/cd/Recent content in CI/CD on TiJetHugoenTue, 04 Aug 2026 00:00:00 +0000https://www.tainuohc.com/en/blog/2026-08-04-jenkins-cicd/Tue, 04 Aug 2026 00:00:00 +0000https://www.tainuohc.com/en/blog/2026-08-04-jenkins-cicd/<h2 id="1-why-jenkins">1. Why Jenkins</h2> <p><strong>Jenkins</strong> is an open-source CI/CD tool. Its core purpose: after code is pushed to a Git repository, automatically run &ldquo;fetch code → build → test → package → deploy&rdquo;.</p> <h2 id="2-installation">2. Installation</h2> <h3 id="prerequisite-java">Prerequisite: Java</h3> <p>Jenkins requires <strong>Java 17 or 21</strong>. Newer versions (e.g., Java 26) fail to start:</p> <pre tabindex="0"><code>Running with Java 26 ... not yet fully supported. Supported Java versions are: [17, 21] </code></pre><div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>wget https://get.jenkins.io/war-stable/latest/jenkins.war -O /tmp/jenkins.war </span></span><span style="display:flex;"><span>/opt/jdk-21/bin/java -jar /tmp/jenkins.war --httpPort<span style="color:#f92672">=</span><span style="color:#ae81ff">9090</span> </span></span></code></pre></div><h3 id="recommended-docker">Recommended: Docker</h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>docker run -d <span style="color:#ae81ff">\ </span></span></span><span style="display:flex;"><span><span style="color:#ae81ff"></span> --name jenkins <span style="color:#ae81ff">\ </span></span></span><span style="display:flex;"><span><span style="color:#ae81ff"></span> -p 9090:8080 <span style="color:#ae81ff">\ </span></span></span><span style="display:flex;"><span><span style="color:#ae81ff"></span> -v jenkins_home:/var/jenkins_home <span style="color:#ae81ff">\ </span></span></span><span style="display:flex;"><span><span style="color:#ae81ff"></span> jenkins/jenkins:lts-jdk21 </span></span></code></pre></div><h2 id="3-initial-setup">3. Initial Setup</h2> <p>Visit <code>http://localhost:9090</code>:</p>