Linux服务器centos7系统下搭建Jenkins
<p>Jenkins是什么？</p><p>Jenkins是开源CI&CD软件领导者， 提供超过1000个插件来支持构建、部署、自动化， 满足任何项目的需要。</p>
<p>所以现在是越来越多的公司都在使用Jenkins做持续集成。</p>
<p>那么今天就给大家来分享一下，如何在Linux服务器上部署Jenkins。</p>
<p>首先，安装Jenkins必须要有一个前提条件：<span style="color: rgba(255, 0, 0, 1)">安装好JDK，并且最低是1.8以上的版本。</span></p>
<p><span style="color: rgba(0, 0, 0, 1)">这是因为Jenkins是一个独立的基于Java的程序。所以，明白了吧？</span></p>
<p><span style="color: rgba(0, 0, 0, 1)">安装好JDK后，我们就可以开始直接安装了。</span></p>
<h3><span style="color: rgba(0, 128, 128, 1)">1.添加Jenkins源</span></h3>
<p><span style="color: rgba(0, 0, 0, 1)">执行下面2个命令</span></p>
<p><span style="color: rgba(0, 0, 0, 1)">sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo</span></p>
<p><span style="color: rgba(0, 0, 0, 1)"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731170944208-318032157.png"></span></p>
<p> </p>
<p><span style="color: rgba(0, 0, 0, 1)">sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key</span></p>
<p><span style="color: rgba(0, 0, 0, 1)"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731170954883-293853909.png"></span></p>
<p> </p>
<p class="ordinary-output target-output clearfix"><span>ps：如果在以前从Jenkins导入过密钥，那么“rpm --import”将失败，因为在服务器上已经有了一个密钥。所以，这个错误信息可以忽略</span></p>
<h3 class="ordinary-output target-output clearfix">2.通过yum命令安装Jenkins</h3>
<p class="ordinary-output target-output clearfix"><span>yum -y install jenkins</span></p>
<p class="ordinary-output target-output clearfix"><span><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731171026196-1199170557.png"></span></p>
<p> </p>
<h3 class="ordinary-output target-output clearfix"><span style="color: rgba(0, 128, 128, 1)">3.修改Jenkins的端口号</span></h3>
<h3 class="ordinary-output target-output clearfix"><span>（<span style="color: rgba(255, 0, 0, 1)">ps：此处是因为Jenkins的端口号默认是8080，与tomcat的默认端口冲突，所以可以根据自己的条件判断是否需要修改，此处我是已经修改为9999端口</span>）</span></h3>
<p class="ordinary-output target-output clearfix"><span>输入vi /etc/sysconfig/jenkins</span></p>
<p class="ordinary-output target-output clearfix"><span><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731171248027-148037508.png"></span></p>
<p class="ordinary-output target-output clearfix">将JENKINS_PORT修改为自己想要的端口号，前提得保证修改后的这个端口没有被其他的进程占用。（小白专用：进入vi编辑器后，输入i进行插入模式，修改完成后依次按下Esc :wq，保存退出）</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731171322676-1243909069.png"></p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)">4.启动Jenkins</span></h3>
<p>输入 service jenkins start，会有一个错误提示，Starting jenkins (via systemctl): Job for jenkins.service failed because the control process.service" and "journalctl -xe" for details.</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731171553584-904094483.png"></p>
<p>此处已经明显的看到了有错误，不用担心，这个错误是因为Jenkins的配置信息中，没有配置JAVA命令</p>
<p>输入 vi /etc/init.d/jenkins</p>
<p class="ordinary-output target-output clearfix"> <img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731172145579-1346748130.png"></p>
<p class="ordinary-output target-output clearfix">找到candidates，将jdk下的JAVA命令路径添加到该配置中<span style="color: rgba(255, 0, 0, 1)">，注意是JAVA命令路径，不是JDK路径</span></p>
<p class="ordinary-output target-output clearfix"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731172533161-1579668703.png"></p>
<p>改好了之后，再次启动Jenkins就可以了。</p>
<p>输入 service jenkins start</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731172708281-232000624.png"></p>
<p>Starting jenkins (via systemctl): Warning: jenkins.service changed on disk. Run 'systemctl daemon-reload' to reload units.</p>
<p>这只是一个警告，提示的是说Jenkins在磁盘上已经被修改了，需要执行一下systemctl daemon-reload，那么我们执行一下就OK了。其实这只是一个警告，忽略也是没关系的。</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731172953467-2003291382.png"></p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)">5.启动成功后，浏览器运行Jenkins</span></h3>
<p><span style="color: rgba(0, 0, 0, 1)">浏览器中输入： 服务器ip:Jenkins端口号，如图：</span></p>
<p><span style="color: rgba(0, 0, 0, 1)"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731174315187-2139708656.png"></span></p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)"> 6.获取Jenkins密钥</span></h3>
<p>在Linux上输入：cat /var/lib/jenkins/secrets/initialAdminPassword</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731174558609-330316967.png"></p>
<p>将这段密钥复制，贴到浏览器即可。</p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)">7.获取密钥之后就可以开始安装插件了。</span></h3>
<p><span style="color: rgba(0, 0, 0, 1)">（ps：一般都选择推荐安装即可）</span></p>
<p> <img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731174826054-1717587994.png"></p>
<p> </p>
<p> <img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731175010265-1839249939.png"></p>
<h3><span style="color: rgba(0, 128, 128, 1)">8.插件安装完成后，需要新建一个管理员账户（<span style="color: rgba(255, 0, 0, 1)">ps：此时可以用Jenkins默认管理员账户，但是不建议，因为不安全</span>）</span></h3>
<p><span style="color: rgba(0, 128, 128, 1)"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731175206591-134747976.png"></span></p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)"> 9.Jenkins配置URL：</span></h3>
<p><span style="color: rgba(0, 128, 128, 1)"><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731175753266-192691025.png"></span></p>
<p> </p>
<p> </p>
<h3><span style="color: rgba(0, 128, 128, 1)">10.开始构建项目咯~~~</span></h3>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201907/1416267-20190731175732398-583175442.png"></p>
<p> </p>
<h3><span style="color: rgba(255, 0, 0, 1)">特别强调一下：</span></h3>
<p>当打开Jenkins，安装插件时，提示，No such plugin:Cloudbees-folder，是因为缺少了Cloudbees-folder这个插件</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201908/1416267-20190801094312058-16200109.png"></p>
<p>解决办法：</p>
<p>1.在网站上下载cloudbees-folder.hpi，下载地址：http://ftp.icm.edu.pl/packages/jenkins/plugins/cloudbees-folder/，下载最新的即可</p>
<p>2.在浏览器中打开Jenkins，在Jenkins地址后加上 /manage</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201908/1416267-20190801094850044-50204262.png"></p>
<p>3.选择插件管理（Manage Plugins）->高级（advanced）</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201908/1416267-20190801095536201-270027575.png"></p>
<p> </p>
<p> 4.选择上传插件（upload plugins）</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201908/1416267-20190801095715647-277008818.png"></p>
<p>5.点击提交</p>
<p>6.重启Jenkins即可解决该问题</p>
<p><img src="https://img2018.cnblogs.com/blog/1416267/201908/1416267-20190801095853880-1222327820.png"></p>
<p> </p>
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