Declarative Pipeline that use OpenShift/Kubernetes Pod as agent

Jenkinsfile

// Uses Declarative syntax to run commands inside a container.
pipeline {
    agent {
        kubernetes {
            cloud 'openshift'
            defaultContainer 'maven'
            yaml '''
apiVersion: v1
kind: Pod
spec:
  containers:
    - name: jnlp
      image: jenkins/inbound-agent:4.11-1-jdk11
      volumeMounts:
        - name: home-volume
          mountPath: /home/jenkins
      env:
        - name: HOME
          value: /home/jenkins
    - name: maven
      image: public.ecr.aws/docker/library/maven:3.8.5-jdk-8
      command:
        - sleep
      args:
        - infinity
      volumeMounts:
        - name: home-volume
          mountPath: /home/jenkins
      env:
        - name: HOME
          value: /home/jenkins
        - name: MAVEN_OPTS
          value: -Duser.home=/home/jenkins
  volumes:
    - name: home-volume
      emptyDir: {}
'''
        }
    }
    stages {
        stage('Build and Test') {
            steps {
                git branch: 'main', url: 'https://github.com/OpenLiberty/sample-getting-started.git'
                
                sh 'mvn clean package -B -ntp -DskipTests'
                
                archiveArtifacts artifacts: '**/target/*.war'
            }
        }
    }
}