Installing Jenkins and Java in CentOS6.5 and Creating the Freestyle Project Job for Shell command execution

In this tutorial we will learn, how to install openJDK and Jenkins in CentOS6.5 and how to configured jobs in Jenkins.

We need:

1. CentOS6.5 Installed in your system

2. Have root level access

3. Internet access in your system for downloading the required files

Installing the java-1.7.0-openjdk

For installing the java you have to type the bellow command:

[root@dev]# yum install java-1.7.0-openjdk

...

[root@dev]# java -version

[root@dev]# java -version

java version "1.7.0_95"

OpenJDK Runtime Environment (rhel-2.6.4.0.el6_7-x86_64 u95-b00)

OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

Installation of a stable version of Jenkins

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

Start/Stop

service jenkins start/stop/restart

chkconfig jenkins on

Start the Jenkins

service jenkins start

Verify Jenkins is running or not?

[root@dev]# ps -ef | grep jenkins

root      3912  1939  0 20:17 pts/0    00:00:00 grep jenkins

jenkins   8331     1  5 19:41 ?        00:01:58 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_HOME=/var/

lib/jenkins -jar /usr/lib/jenkins/jenkins.war --logfile=/var/log/jenkins/jenkins.log --webroot=/var/cache/jenkins/war --daemon --httpPort=8080 --ajp13

Port=8009 --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20

Note: I'm running CentOS with vagrant and virtual box so I have to do the tunneling for access the Host and port of Jenkins by putty. 

Open the any browser and type the URL of Jenkins

http://localhost:8080/

Create the Jobs:

Click on the New Item

Type the Item Name First-job-in-jenkins

Select the Freestyle project

In configuration page come all the way down

Select Execute Shell from Add build step and type

ps -fe | grep jenkins

Email notification from Add post build action

Type the email Recipients 

Click on the Save

Now this configuration will save 

[root@dev]# vi /var/lib/jenkins/jobs/First-job-in-jenkins/config.xml

<?xml version='1.0' encoding='UTF-8'?>

<project>

  <actions/>

  <description></description>

  <keepDependencies>false</keepDependencies>

  <properties>

    <jenkins.model.BuildDiscarderProperty>

      <strategy class="hudson.tasks.LogRotator">

        <daysToKeep>2</daysToKeep>

        <numToKeep>2</numToKeep>

        <artifactDaysToKeep>-1</artifactDaysToKeep>

        <artifactNumToKeep>-1</artifactNumToKeep>

      </strategy>

    </jenkins.model.BuildDiscarderProperty>

  </properties>

  <scm class="hudson.scm.NullSCM"/>

  <canRoam>true</canRoam>

  <disabled>false</disabled>

  <blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>

  <blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>

  <triggers>

    <hudson.triggers.TimerTrigger>

      <spec></spec>

    </hudson.triggers.TimerTrigger>

  </triggers>

  <concurrentBuild>true</concurrentBuild>

  <builders>

    <hudson.tasks.Shell>

      <command>ps -ef | grep jenkins</command>

    </hudson.tasks.Shell>

  </builders>

  <publishers>

    <hudson.tasks.Mailer plugin="mailer@1.11">

      <recipients>tutorialbyexample@gmail.com</recipients>

      <dontNotifyEveryUnstableBuild>false</dontNotifyEveryUnstableBuild>

      <sendToIndividuals>true</sendToIndividuals>

    </hudson.tasks.Mailer>

  </publishers>

  <buildWrappers/>

</project>

This is all about how to install Jenkins and Java in CentOS6.5 with job creation in Jenkins.

Ref:

https://wiki.jenkins-ci.org

http://openjdk.java.net/

https://www.centos.org/

https://www.vagrantup.com/

https://www.virtualbox.org/

http://www.putty.org/