Jenkins : How to download and install Jenkins

Jenkins : How to download and install Jenkins

   January 26, 2020       Codez Tech

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Jenkins is an open source automation server. which help to automate the non human part of software development process with continuous integration, continuous delivery and continuous deployment. It a server based system, which runs servlet container such as apache tomcat. 

Jenkins - Installation of Jenkins

1. Overview

            

        Jenkins is an open-source automation tool developed by sun microsystem and written in Java. Initial released date was 2nd february 2011. Jenkins offers continuous integration with continuous delivery and continuous deployment pipeline. Jenkins setup is also breeze due to java based construction. It is ready to play right out of the box & works well with windows, Mac OS X, Linux and Ubuntu.

In this tutorial we will walk you through steps of installing Jenkins on a Linux operating system. 

2. Hardware Requirements

• We need minimum 256 mb of RAM in order to install Jenkins on computer.
• 1 GB hard drive space

3. Software Requirements

              Since Jenkins developed by sun microsystem and written in Java. We have to make sure about that Java is Installed in our system. In order to see whether Java is installed or not, we can say from terminal or command prompt - 

java -version

openjdk version "12.0.1" 2019-04-16

OpenJDK Runtime Environment (build 12.0.1+12)

OpenJDK 64-Bit Server VM

If it is not yet installed then - 

# install java 1.8 on Amazon Linux

sudo yum update -y

sudo yum install -y java-1.8.0-openjdk-devel

sudo alternatives --config java

4. Install Jenkins on Linux Operating System

        For installation of Jenkins on linux operating system please follow up the below steps - 

# install Jenkins on Amazon Linux

sudo wget -O /etc/yum.repos.d/jenkins.repo

http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo sudo rpm --import
http://pkg.jenkins-ci.org/redhat-stable/jenkins-ci.org.key
sudo yum install jenkins

If you are installing Jenkins in Amazon Cloud server, while connecting to EC2 server make sure you have followed the below steps, or else you won't be able to connect -

# ssh into EC2 instance

ls -lah /path/jenkins-key.pem

chmod 400 /path/jenkins-key.pem

ssh -i /path/jenkins-key.pem

ec2-user@ec2-123-456-78-9.compute-1.amazonaws.com

Once your installation is done please start and enable your Jenkins service by saying - 

# start Jenkins at boot time

sudo systemctl start jenkins.service

sudo systemctl enable jenkins.service

If you want to restart your Jenkins please follow below steps - 

#Restart Jenkins

sudo /etc/init.d/jenkins restart

Make sure you have installed git if you are dealing with cloning repository from bitbucket or Github or any other platform - 

# install git

sudo yum install git

5. Install Jenkins on RPM Distros Operating System

      For installation of Jenkins on rpm distros please follow up the below steps - 

# Add yum repo and install Jenkins

sudo wget -O /etc/yum.repos.d/jenkins.repo

http://pkg.jenkins-ci.org/redhat-stable/

jenkins.repo

sudo rpm --import

http://pkg.jenkins-ci.org/

redhat-stable/jenkins-ci.org.key

sudo yum install jenkins

Once your installation is done please start and enable your Jenkins service by saying - 

# Start Jenkins at boot time

sudo systemctl start jenkins.service

sudo systemctl enable jenkins.service

If you want to restart your Jenkins please follow below steps - 

#Restart Jenkins

sudo /etc/init.d/jenkins restart

6. Install Jenkins on Ubuntu Operating System

        For installation of Jenkins on ubuntu please followup the below steps - 

# Add PPA repo for Jenkins stable LTS

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key

| sudo apt-key add -

sudo sh -c "echo deb http://pkg.jenkins.io/debian-stable binary/ >

/etc/apt/sources.list.d

/jenkins.list"

sudo apt-get update

# Install Jenkins

sudo apt-get install jenkins

Once your installation is done please start and enable your Jenkins service by saying - 

# Start Jenkins at boot time

sudo systemctl start jenkins.service

sudo systemctl enable jenkins.service

If you want to restart your Jenkins please follow below steps - 

#Restart Jenkins

sudo /etc/init.d/jenkins restart

7. Install Jenkins with Docker

          For installation of Jenkins with docker please follow the below steps - 

# Pull official Docker image for Jenkins LTS

docker pull jenkins/jenkins:lts

# Start Docker container

docker run -p 8080:8080 -p

50000:50000 -v

jenkins_home:/var/jenkins jenkins/jenkins:lts

# Start Docker container in detached mode

docker run -p 8080:8080 -p 50000:50000 -v

jenkins_home:/var/jenkins -d

jenkins/jenkins:lts

8. Unlock Jenkins 

Once your installation is done you can type from your browser - 

If you have installed Jenkins in your local system then - 

localhost:8080

If you have installed Jenkins in your server then - 

Your_Server_Public_Ip:8080

You will get the below screen - 

Unlock Jenkins

Order to get the password from you command prompt do - 

cat the_path_is_provided_on_screen_like

cat

/var/lib/jenkins/secretes/initialAdminPassword

Please copy the password from the terminal and click on continue, you will see - 

Customize Jenkins

Click on Install Suggested Plugins, then - 

Jenkins Getting Started

Once your installation is done, you will be asking for reset password - 

Reset your username and password

Click on save and continue, 

Jenkins Instance Configuration

Click on save and continue and congratulations, we have successfully installed Jenkins Server. Hit start using Jenkins - 

Jenkins is ready

Then you will see the below screen - 

Welcome to Jenkins - Start Create New Job

More details please visit official Documentation - https://jenkins.io

More details please visit my youtube video -