Tutorial on installing Jenkins instance on CentOS 7

Installing Jenkins on CentOS 7

Jenkins Installation

Step 1: Update CentOS 7

One of the best practices for Linux system administrators is to keep their systems up to date. Install the latest stable package and reboot.

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sudo yum install epel-release sudo yum update sudo reboot

Step 2: Install Java

Before installing Jenkins, you need to set up a Java virtual machine on the system. Here, let us install the latest OpenJDK Runtime Environment 1.8.0 using YUM:

1 2	yum install java-1.8.0-openjdk.x86_64

After the installation is complete, you can confirm by running the following command:

This command will tell you about your installed Java runtime environment:

1 2	##java- version

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openjdk version"1.8.0_91" OpenJDK Runtime Environment(build1.8.0_91-b14) OpenJDK64-Bit Server VM(build25.91-b14,mixed mode)

To help Java-based applications correctly locate the Java virtual machine, two environment variables need to be set: "JAVA_HOME" and "JRE_HOME".

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cp/etc/profile/etc/profile_backup echo'export JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk'|sudo tee-a/etc/profile echo'export JRE_HOME=/usr/lib/jvm/jre'|sudo tee-a/etc/profile source/etc/profile

Finally, test

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##echo $JAVA_HOME echo$JRE_HOME

Step 3: Jenkins

Install using the official YUM repoLatest stable version Jenkins

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##cd ~ wget-O/etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo rpm--import http://pkg.jenkins-ci.org/redhat-stable/jenkins-ci.org.key yum install jenkins

Start the Jenkins service and set it to run on startup:

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##systemctl start jenkins.service systemctl enable jenkins.service

In order to allow visitors to access Jenkins, you need to allow inbound traffic on port 8080:

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<span style="color: #008000;">firewall-cmd--zone=public--permanent--add-port=8080/tcp</span> <span style="color: #008000;">firewall-cmd--reload </span>

##Now, test Jenkins by accessing the following address from your web browser:

http://:8080

<span style="color: #008000">Access is successful as shown below<span style="font-weight: bold"></span></span>

Check the password as follows

It’s done, it’s that simple