Install and Configure Jenkins on CentOS 8
In this Video, We are going to perform How to Install Jenkins on CentOS 8/RHEL 8 or any other cloud platform like Amazon EC2, Azure VM, Google Cloud Compute,etc. with preinstalled CentOS 8/RHEL 8.
You can follow below our article to install Jenkins on CentOS 8
Prerequisites
CentOS 8 with Minimal Installation
Atleast 1 GB RAM
JDK 1.8 or Higher verison is supported
Open Port 8080
Install JDK on Ubuntu
Please follow below article to download and install Oracle JAVA 11 on CentOS 8 Manually
OR
You can install Open JDK 11
sudo yum -y install java-11-openjdk-devel
Verify Java Version
To check the java version:
java -version
Step 1: Download and Add Jenkins GPG Key
Download and Add Jenkins LTS repo in /etc/yum.repos.d/jenkins.repo location
sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
Import Jenkins GPG Key
sudo rpm –import https://jenkins-ci.org/redhat/jenkins-ci.org.key
Step 2: Install Jenkins On CentOS 8/RHEL 8
Once key and repository added , update the system packages
sudo yum update
Now its time to Install Jenkins and its dependencies:
sudo yum install jenkins
Step 4: Start Jenkins Service
Once installation completed, start the Jenkins service
sudo systemctl start jenkins
Check the Jenkins Service
sudo systemctl status jenkins
Allow port 8080/tcp in Firewall to Access Jenkins from remotely
sudo firewall-cmd –permanent –zone=public –add-port=8080/tcp
sudo firewall-cmd –reload
If you have installed Jenkins on Cloud Instance Allow the Port in Incoming or Network Security Group
How to check jenkins version command line in Linux
To check Jenkins version using command line in CentOS
grep version /var/lib/jenkins/config.xml
Step 5: Configure Jenkins
After installation of Jenkins ,successfully running Jenkins services and we will check on browser by Jenkins default port number 8080.
We can browse server IP address or domain
http://ip_address_or_domain_name:8080.
By hitting IP and Port on browser for the first time it will prompt for InitialAdminPassword. ssh server and type below command.
sudo cat /var/lib/jenkins/secrets/intialAdminPassword
After entering it will give some key as output. Copy and Paste in the browser and Click “Continue” .
In the above image we select “Install Suggested Plugins”, and progress bar will start.
When the Installation get successful it will prompt for another page “Create First Admin User”. On the below page enter username,password,Email.
In the above pic you can create new user and password or you can “Continue as admin“. After configuring everything you will prompt a new page.
Next it will ask to configure URL to access Jenkins and click on save and Finish button.
Now click on “Start using Jenkins”. It will redirect to Jenkins Dashboard:
Finally you can see Jenkins Dashboard
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