MultipleLinuxServer

Source code for WebCalculator app is at

https://github.com/Sonal0409/JavaWebCalculator.git


Create 2 new ec2-instance and name them as QAServer & prodServer.

Go to Jenkins Master

Connect master to QAServer
Connect master to prodServer

Follow the below steps:

LINUX SLAVE
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create root directory

cd /tmp
mkdir jenkisndir

give permission to the directory

sudo chmod -R 777 /tmp/jenkinsdir

Go to master
*************

Go to node

give following informtion under Launch Method

how to connect to master- select ssh

host: private ip

provide credentials

also set 
Host key verfication as:
Non verifying Verification startegy

Save it.

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Create a new pipeline job : QApipelineJob

Write the following pipeline as code and give Agent label as qa_Server

pipeline{
    
     tools{
        jdk 'myjava'
        maven 'mymaven'
    }
    agent {label 'qa_Server'}
    stages{
        stage('checkout'){
            steps{
               git branch: 'qa', url: 'https://github.com/sonal04devops/JavaWebCalculator.git'
            }
        }
         stage('Compile'){
              
              steps{
                  echo 'compiling..'
                  sh 'mvn compile'
	      }
          }
          stage('UnitTest'){
               
              steps{
                  sh 'mvn test'
              }
               post {
               success {
                   junit 'target/surefire-reports/*.xml'
               }
           }	
          }
          stage('Package'){
        
              steps{
                  sh 'mvn package'
              }
          }
          
}
}

Save the job and Build the job
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Create a new pipeline job : QApipelineJob

Write the following pipeline as code and give Agent label as prod_Server

pipeline{
    
     tools{
        jdk 'myjava'
        maven 'mymaven'
    }
    agent {label 'prod_server'}
    stages{
        stage('checkout'){
            steps{
               git 'https://github.com/sonal04devops/JavaWebCalculator.git'
            }
        }
         stage('Compile'){
              
              steps{
                  echo 'compiling..'
                  sh 'mvn compile'
	      }
          }
          stage('UnitTest'){
               
              steps{
                  sh 'mvn test'
              }
               post {
               success {
                   junit 'target/surefire-reports/*.xml'
               }
           }	
          }
          stage('Package'){
        
              steps{
                  sh 'mvn package'
              }
          }
          
}
}

******************************************************

Otherwise you can create Jenkins files with pipeline code in respective branches (Master & QA) and then execute the Job in Jenkins.

You can also connect QA and prod jobs to get executed one after the other. This will automaticlly trigger prodServer job.




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Parameters
In order to support the wide variety of use-cases Pipeline authors may have, the agent section supports a few different types of parameters. These parameters can be applied at the top-level of the pipeline block, or within each stage directive.

any
Execute the Pipeline, or stage, on any available agent. For example: agent any

none
When applied at the top-level of the pipeline block no global agent will be allocated for the entire Pipeline run and each stage section will need to contain its own agent section. For example: agent none

label
Execute the Pipeline, or stage, on an agent available in the Jenkins environment with the provided label. For example: agent { label 'my-defined-label' }

Label conditions can also be used. For example: agent { label 'my-label1 && my-label2' } or agent { label 'my-label1 || my-label2' }

node
agent { node { label 'labelName' } } behaves the same as agent { label 'labelName' }, but node allows for additional options (such as customWorkspace).