Configure Jenkins Slaves on Amazon Linux

Prerequisites

1. Jenkins Master Running, please refer this link
2. EC2 RHEL 7.x Instance – for Slave Node With Internet Access
3. Security Group with Port 8080 open for internet
4. Java v1.8.x

Install Java

We will be using open java for our demo, Get latest version from http://openjdk.java.net/install/. Also configure the default JAVA_HOME path

yum install java-1.8*

Setup Jenkins Slave

1. Create user and add the user to wheel group

   useradd jenkins-slave-01

2. Create SSH Keys

   sudo su - jenkins-slave-01
   ssh-keygen -t rsa -N "" -f /home/jenkins-slave-01/.ssh/id_rsa

3. The private and public keys will be created at these locations `/home/jenkins-slave-01/.ssh/id_rsa` and `/home/jenkins-slave-01/.ssh/id_rsa.pub`

   cd .ssh
   cat id_rsa.pub > authorized_keys
   chmod 700 authorized_keys

Configuration on Master

1. Copy the slave node’s public key[id_rsa.pub] to Master Node’s known_hosts file

   mkdir -p /var/lib/jenkins/.ssh
   cd /var/lib/jenkins/.ssh
   ssh-keyscan -H SLAVE-NODE-IP-OR-HOSTNAME >>/var/lib/jenkins/.ssh/known_hosts

2. Giving permission

   chown jenkins:jenkins known_hosts
   chmod 700 known_hosts

Configure the Slave using Manage Jenkins

1. Configure the node as shown here Manage Jenkins > Manage Nodes > New Node
   
2. Click Save