Install Jenkins on AWS EC2

Jenkins is a self-contained Java-based program, ready to run out-of-the-box, with packages for Windows, Mac OS X and other Unix-like operating systems. As an extensible automation server, Jenkins can be used as a simple CI server or turned into the continuous delivery hub for any project.

Prerequisites

1. EC2 Centos Instance

   • With Internet Access
   • Security Group with Port 8080 open for internet

2. Java v1.8.x

Install Java

Update the OS

sudo yum update -y

We will be using open java for our demo, Get latest version from http://openjdk.java.net/install/

sudo yum -y install java-1.8*
#sudo yum -y install java-1.8.0-openjdk

Confirm Java Version

Lets install java and set the java home

java -version
find /usr/lib/jvm/java-1.8* | head -n 3
#Add JAVA_HOME and update of PATH to ~/.bash_profile
#example value set below
echo 'export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.312.b07-1.el7_9.x86_64' >> ~/.bash_profile
echo 'PATH=$PATH:$JAVA_HOME' >> ~/.bash_profile
echo 'export PATH' >> ~/.bash_profile
chmod 755 ~/.bash_profile

To set it permanently update your .bash_profile

~/.bash_profile

[root@~]# java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)

Install Jenkins

You can install jenkins using the rpm or by setting up the repo. We will setup the repo so that we can update it easily in future. Get latest version of jenkins from https://pkg.jenkins.io/redhat-stable/

sudo su
yum install epel-release -y
yum -y install wget
wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
yum -y install jenkins

Start Jenkins

# Start jenkins service
systemctl start jenkins

# Setup Jenkins to start at boot,
systemctl enable jenkins

Accessing Jenkins

By default jenkins runs at port 8080, You can access jenkins at

http://YOUR-SERVER-PUBLIC-IP:8080

Configure Jenkins

• The default Username is admin
• Grab the default password
  • Password Location:/var/lib/jenkins/secrets/initialAdminPassword
• Skip Plugin Installation; We can do it later
• Change admin password
  • Admin > Configure > Password
• Configure java path
  • Dashboard > Manage Jenkins > Global Tool Configuration > JDK > Enter some name like Java1.8 > Enter JAVA_HOME from the server > Scroll to bottom > Save
• Dashboard > Manage Jenkins > Manage Users > Create User > Create another admin user id

Test Jenkins Jobs

1. Dashboard > New item
2. Enter an item name – My-First-Project
   • Chose Freestyle project
3. Under Build section Execute shell : echo "Welcome to Jenkins Demo"
4. Save your job
5. Click on Build Now
6. Click on latest build link in Build History section
7. Click on "Console Output"

Next Step