Example Jenkinsfile

Jenkinsfile

#!groovy

String GIT_VERSION

node {

  def buildEnv
  def devAddress

  stage ('Checkout') {
    deleteDir()
    checkout scm
    GIT_VERSION = sh (
      script: 'git describe --tags',
      returnStdout: true
    ).trim()
  }

  stage ('Build Custom Environment') {
    buildEnv = docker.build("build_env:${GIT_VERSION}", 'custom-build-env')
  }

  buildEnv.inside {

    stage ('Build') {
      sh 'sbt compile'
      sh 'sbt sampleClient/universal:stage'
    }

    stage ('Test') {
      parallel (
        'Test Server' : {
          sh 'sbt server/test'
        },
        'Test Sample Client' : {
          sh 'sbt sampleClient/test'
        }
      )
    }

    stage ('Prepare Docker Image') {
      sh 'sbt server/docker:stage'
    }
  }

  stage ('Build and Push Docker Image') {
    withCredentials([[$class: "UsernamePasswordMultiBinding", usernameVariable: 'DOCKERHUB_USER', passwordVariable: 'DOCKERHUB_PASS', credentialsId: 'Docker Hub']]) {
      sh 'docker login --username $DOCKERHUB_USER --password $DOCKERHUB_PASS'
    }
    def serverImage = docker.build("sambott/grpc-test:${GIT_VERSION}", 'server/target/docker/stage')
    serverImage.push()
    sh 'docker logout'
  }

  stage ('Deploy to DEV') {
    devAddress = deployContainer("sambott/grpc-test:${GIT_VERSION}", 'DEV')
  }

  stage ('Verify Deployment') {
    buildEnv.inside {
      sh "sample-client/target/universal/stage/bin/demo-client ${devAddress}"
    }
  }
}

stage 'Deploy to LIVE'
  timeout(time:2, unit:'DAYS') {
    input message:'Approve deployment to LIVE?'
  }
  node {
    deployContainer("sambott/grpc-test:${GIT_VERSION}", 'LIVE')
  }

def deployContainer(image, env) {
  docker.image('lachlanevenson/k8s-kubectl:v1.5.2').inside {
    withCredentials([[$class: "FileBinding", credentialsId: 'KubeConfig', variable: 'KUBE_CONFIG']]) {
      def kubectl = "kubectl  --kubeconfig=\$KUBE_CONFIG --context=${env}"
      sh "${kubectl} set image deployment/grpc-demo grpc-demo=${image}"
      sh "${kubectl} rollout status deployment/grpc-demo"
      return sh (
        script: "${kubectl} get service/grpc-demo -o jsonpath='{.status.loadBalancer.ingress[0].hostname}'",
        returnStdout: true
      ).trim()
    }
  }
}


// vim: set syntax=groovy :

I added the config file with name 'KubeConfig' as a secret file in the Jenkins credentials. I am getting this error while running the build.

error validating data: mkdir /.kube: permission denied; if you choose to ignore these errors, turn validation off with --validate=false