Hack The Sec-Leading Resource Of Linux Tutorial: Jenkins

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<span style="color: #990000; font-size: large;"><u>Install and configure Jenkins with Nginx as a reverse proxy on CentOS</u></span></h1>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b>Jenkins </b>is an open source continuous integration tool written in Java. The project was forked from Hudson after a dispute with <b>Oracle</b>.</span></span></div>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Jenkins provides continuous integration services for software development. It is a server-based system running in a servlet container such as Apache Tomcat. It supports SCM tools including AccuRev, CVS, Subversion, Git, Mercurial, Perforce, Clearcase and RTC, and can execute Apache Ant and Apache Maven based projects as well as arbitrary <a href="http://www.hackthesec.co.in/search/label/shell_scripting">shell scripts</a> and Windows batch commands. The primary developer of Jenkins is Kohsuke Kawaguchi. Released under the MIT License, Jenkins is free software.</span></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxzS6fLZ8Rvv-kjBnQknvjrFOu1d67B07LD40nbmroTmXJucx_QNwYOEWZxAfWFyaOobE2ZP9Dt4GSDvnhv1SiaTYFVa1THziNFdG3a8dBmcuDLxexp5jV4w2mU4GcQq3OO9T6NYWXThav/s1600/jenkins_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxzS6fLZ8Rvv-kjBnQknvjrFOu1d67B07LD40nbmroTmXJucx_QNwYOEWZxAfWFyaOobE2ZP9Dt4GSDvnhv1SiaTYFVa1THziNFdG3a8dBmcuDLxexp5jV4w2mU4GcQq3OO9T6NYWXThav/s1600/jenkins_www.hackthesec.co.in.png" /></a></div>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Builds can be started by various means, including being triggered by commit in a version control system, by scheduling via a cron-like mechanism, by building when other builds have completed, and by requesting a specific build URL.</span></span></div>
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<span style="color: #0b5394; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>REQUIREMENTS</u></b></span></span></div>
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<span style="color: #0b5394; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>Login to your VPS via SSH</u></b></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">ssh user@vps_IP</span></span></pre>
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<span style="color: #0b5394; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u>UPDATE THE SYSTEM</u></b></span></span></div>
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<span style="font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Make sure your server is fully up to date:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: #333333; font-size: 12px; line-height: 19.2px; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;">yum update</span></span></pre>
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<span style="font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">INSTALL JAVA AND NGINX</span></u></b></span></span></div>
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Your next step is to install <a href="http://www.hackthesec.co.in/search/label/NGINX">Nginx </a>along some needed dependencies and the nano text editor so you can edit some config files. Of course, you can use your favorite text editor.</div>
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Install the official Nginx repository for <a href="http://www.hackthesec.co.in/search/label/Centos">CentOS</a> 7 and then install Nginx, nano etc… Use the below commands to do that:</div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

# yum install nginx wget nano</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Start Nginx and enable it to start on boot:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># systemctl start nginx

# systemctl enable nginx</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now create a host directive for the domain from which you will access Jenkins. Open a file, let’s say called 'your_domain.conf' in the '/etc/nginx/conf.d/' directory:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># nano /etc/nginx/conf.d/your_domain.conf</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Paste the following:</span></span></div>
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<pre style="background-color: whitesmoke; border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; word-break: break-all; word-wrap: break-word;">upstream jenkins {
    server 127.0.0.1:8080;
}

server {
    listen      80 default;
    server_name your_jenkins_site.com;

access_log  /var/log/nginx/jenkins.access.log;
    error_log   /var/log/nginx/jenkins.error.log;

proxy_buffers 16 64k;
    proxy_buffer_size 128k;

location / {
        proxy_pass  http://jenkins;
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
        proxy_redirect off;

proxy_set_header    Host            $host;
        proxy_set_header    X-Real-IP       $remote_addr;
        proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header    X-Forwarded-Proto https;
    }

}</pre>
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Replace the 'your_jenkins_site.com' value with your own domain, save and close the file.</div>
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Test if the Nginx configuration is OK:</div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># nginx -t</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">If everything is OK, restart Nginx for the changes to take effect:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># service nginx restart</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Since Jenkins is built with Java, let’s install it with the yum package manager:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># yum install java
</span></span></pre>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># java -version

openjdk version "1.8.0_71"
OpenJDK Runtime Environment (build 1.8.0_71-b15)
OpenJDK 64-Bit Server VM (build 25.71-b15, mixed mode)</span></span></pre>
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<span style="font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;"><b><u><span style="color: #0b5394;">INSTALL JENKINS</span></u></b></span></span></div>
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Download the Jenkins repo and install Jenkins with the following commands:</div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo

# rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key

# yum install jenkins</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Start the Jenkins server and enable it to start on boot with:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "trebuchet ms" , sans-serif;"><span style="font-size: 15px; line-height: 15.6px;"># service jenkins start

# systemctl enable jenkins</span></span></pre>
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<span style="color: #222222; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 15px; line-height: 26px;">Congratulations, you have successfully installed Jenkins..</span></span></div>
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<pre style="background-color: whitesmoke; border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; word-break: break-all; word-wrap: break-word;"><a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></pre>
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