Update Jenkinsfile

Jenkinsfile

@@ -3,62 +3,18 @@
 pipeline {
     agent {
         kubernetes {
-            yaml """
+            yaml k8sPodTemplate('default', false, false)
-apiVersion: v1
-kind: Pod
-metadata:
-  name: default
-  namespace: default
-  labels:
-    jenkins-server-jenkins-agent: "true"
-spec:
-  containers:
-    - name: jnlp
-      image: jenkins/inbound-agent:3309.v27b_9314fd1a_4-2
-      workingDir: /home/jenkins/agent
-      env:
-        - name: JENKINS_URL
-          value: "http://jenkins-server.default.svc.cluster.local:8080/"
-      resources:
-        requests:
-          cpu: "512m"
-          memory: "512Mi"
-        limits:
-          cpu: "512m"
-          memory: "512Mi"
-
-    - name: docker
-      image: docker:dind
-      workingDir: /home/jenkins/agent
-      command: ["/bin/sh", "-c"]
-      args: ["sleep 9999999"]
-      securityContext:
-        privileged: true
-      env:
-        - name: NEXUS_DOCKER_URL
-          value: "nexus-repo-nexus-repository-manager.default.svc.cluster.local:5000"
-        - name: NEXUS_DOCKER_PASS
-          value: "testpass"
-
-  restartPolicy: Never
-  serviceAccountName: jenkins-server
-  volumes:
-    - emptyDir: {}
-      name: workspace-volume
-"""
         }
     }
     stages{
-        stage('Retrieve docker Environment Variables') {
+        stage('Retrieve Environment Variables') {
             steps {
-                container('docker') {
+                script {
-                    script {
+                    retrieveEnvVars('docker', ['NEXUS_DOCKER_URL', 'NEXUS_DOCKER_PASS'])
-                        env.NEXUS_DOCKER_URL = sh(script: 'echo $NEXUS_DOCKER_URL', returnStdout: true).trim()
-                        env.NEXUS_DOCKER_PASS = sh(script: 'echo $NEXUS_DOCKER_PASS', returnStdout: true).trim()
-                    }
                 }
             }
         }
+
         stage('Docker build & push') {
             steps {
                 script {