Jenkins pipeline

Jenkinsfile

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+#!groovy
+/*
+ * This Jenkins Pipeline depends on the following plugins :
+ *  - Pipeline Utility Steps (https://plugins.jenkins.io/pipeline-utility-steps)
+ *  - Credentials Binding (https://plugins.jenkins.io/credentials-binding)
+ *
+ * This pipeline accepts the following parameters :
+ *  - NPM_CREDENTIALS_ID: The Jenkins Credentials ID that holds login and password to login on NPM Registry
+ *  - NPM_EMAIL: The email address associated with the NPM Account pointed by NPM_CREDENTIALS_ID
+ *  - NPM_REGISTRY: Private NPM registry to log in to (Default if not provided: https://registry.npmjs.org)
+ *  - OPENSHIFT_IMAGE_STREAM: The ImageStream name to use to tag the built images
+ *  - OPENSHIFT_BUILD_CONFIG: The BuildConfig name to use
+ *  - OPENSHIFT_SERVICE: The Service object to update (either green or blue)
+ *  - OPENSHIFT_DEPLOYMENT_CONFIG: The DeploymentConfig name to use
+ *  - OPENSHIFT_BUILD_PROJECT: The OpenShift project in which builds are run
+ *  - OPENSHIFT_TEST_ENVIRONMENT: The OpenShift project in which we will deploy the test version
+ *  - OPENSHIFT_PROD_ENVIRONMENT: The OpenShift project in which we will deploy the prod version
+ *  - OPENSHIFT_TEST_URL: The App URL in the test environment (to run the integration tests)
+ */
+
+// Run this node on a Maven Slave
+// Maven Slaves have JDK and Maven already installed
+node('nodejs') {
+  stage('Checkout Source') {
+    // Get Source Code from SCM (Git) as configured in the Jenkins Project
+    // Next line for inline script, "checkout scm" for Jenkinsfile from GIT
+    //git url: "https://github.com/nmasse-itix/OpenShift-Demo-NodeJS.git"
+    checkout scm
+  }
+
+  def thisPackage = readJSON file: 'package.json'
+  def currentVersion = thisPackage.version
+  def newVersion = "$currentVersion-$BUILD_NUMBER"
+  def packageName = thisPackage.name
+  def packageSpec = "$packageName@$newVersion"
+
+  // You will need the "credential binding" plugin. See here how to install it :
+  // https://support.cloudbees.com/hc/en-us/articles/203802500-Injecting-Secrets-into-Jenkins-Build-Jobs
+  withCredentials([[$class: 'UsernamePasswordMultiBinding', credentialsId: params.NPM_CREDENTIALS_ID,
+                    usernameVariable: 'NPM_USER', passwordVariable: 'NPM_PASS']]) {
+      stage("Login to NPM") {
+        echo "Using NPM CredentialsID = '${params.NPM_CREDENTIALS_ID}'"
+        echo "About to login on NPM with ${env.NPM_USER}/${params.NPM_EMAIL}"
+        sh '''
+        set +x
+        npm install -g npm-cli-login publish
+        npm-cli-login
+        '''
+      }
+  }
+
+  // Run the unit tests
+  stage('Unit Tests') {
+    sh "npm test"
+  }
+
+  // Package the app and publish it to NPM
+  stage('Package and Publish to NPM') {
+    echo "Will publish version $newVersion to NPM"
+    sh "npm version --no-git-tag-version $newVersion"
+    sh "publish"
+  }
+
+  // Build the OpenShift Image in OpenShift using the artifacts from NPM
+  // Also tag the image
+  stage('Build OpenShift Image') {
+
+    // Trigger an OpenShift build in the dev environment
+    openshiftBuild bldCfg: params.OPENSHIFT_BUILD_CONFIG, checkForTriggeredDeployments: 'false',
+                   namespace: params.OPENSHIFT_BUILD_PROJECT, showBuildLogs: 'true',
+                   verbose: 'false', waitTime: '', waitUnit: 'sec',
+                   env: [ [ name: 'NPM_PACKAGE_TO_INSTALL', value: "${packageSpec}" ] ]
+
+
+    // Tag the new build
+    openshiftTag alias: 'false', destStream: params.OPENSHIFT_IMAGE_STREAM, destTag: "${newVersion}",
+                 destinationNamespace: params.OPENSHIFT_BUILD_PROJECT, namespace: params.OPENSHIFT_BUILD_PROJECT,
+                 srcStream: params.OPENSHIFT_IMAGE_STREAM, srcTag: 'latest', verbose: 'false'
+  }
+
+
+  // Deploy the built image to the Test Environment.
+  stage('Deploy to Test') {
+    // Tag the new build as "ready-for-testing"
+    openshiftTag alias: 'false', destStream: params.OPENSHIFT_IMAGE_STREAM, srcTag: "${newVersion}",
+                 destinationNamespace: params.OPENSHIFT_TEST_ENVIRONMENT, namespace: params.OPENSHIFT_BUILD_PROJECT,
+                 srcStream: params.OPENSHIFT_IMAGE_STREAM, destTag: 'ready-for-testing', verbose: 'false'
+
+    // Trigger a new deployment
+    openshiftDeploy deploymentConfig: params.OPENSHIFT_DEPLOYMENT_CONFIG, namespace: params.OPENSHIFT_TEST_ENVIRONMENT
+  }
+
+
+  // Run some integration tests.
+  // Once the tests succeed tag the image
+  stage('Integration Test') {
+    // Run integration tests that are in the GIT repo
+    sh "tests/run-integration-tests.sh '${params.OPENSHIFT_TEST_URL}'"
+
+    // Tag the new build as "ready-for-prod"
+    openshiftTag alias: 'false', destStream: params.OPENSHIFT_IMAGE_STREAM, srcTag: "${newVersion}",
+                 destinationNamespace: params.OPENSHIFT_PROD_ENVIRONMENT, namespace: params.OPENSHIFT_BUILD_PROJECT,
+                 srcStream: params.OPENSHIFT_IMAGE_STREAM, destTag: 'ready-for-prod', verbose: 'false'
+  }
+
+  // Blue/Green Deployment into Production
+  // First step : deploy the new version but do not activate it !
+  stage('Deploy to Production') {
+    // Yes, this is mandatory for the next command to succeed. Don't know why...
+    sh "oc project ${params.OPENSHIFT_PROD_ENVIRONMENT}"
+
+    // Extract the route target (xxx-green or xxx-blue)
+    // This will be used by getCurrentTarget and getNewTarget methods
+    sh "oc get service ${params.OPENSHIFT_SERVICE} -n ${params.OPENSHIFT_PROD_ENVIRONMENT} -o template --template='{{ .spec.selector.color }}' > route-target"
+
+    // Flip/flop target (green goes blue and vice versa)
+    def newTarget = getNewTarget()
+
+    // Trigger a new deployment
+    openshiftDeploy deploymentConfig: "${params.OPENSHIFT_DEPLOYMENT_CONFIG}-${newTarget}", namespace: params.OPENSHIFT_PROD_ENVIRONMENT
+    openshiftVerifyDeployment deploymentConfig: "${params.OPENSHIFT_DEPLOYMENT_CONFIG}-${newTarget}", namespace: params.OPENSHIFT_PROD_ENVIRONMENT
+  }
+
+  // Once approved (input step) switch production over to the new version.
+  stage('Switch over to new Version') {
+    // Determine which is of green or blue is active
+    def newTarget = getNewTarget()
+    def currentTarget = getCurrentTarget()
+
+    // Wait for administrator confirmation
+    input "Switch Production from ${currentTarget} to ${newTarget} ?"
+
+    // Switch blue/green
+    sh "oc patch -n ${params.OPENSHIFT_PROD_ENVIRONMENT} service/${params.OPENSHIFT_SERVICE} --patch '{\"spec\":{\"selector\":{\"color\":\"${newTarget}\"}}}'"
+  }
+
+}
+
+// Get the current target of the OpenShift production route
+// Note: the route-target file is created earlier by the "oc get route" command
+def getCurrentTarget() {
+  def currentTarget = readFile 'route-target'
+  return currentTarget
+}
+
+// Flip/flop target (green goes blue and vice versa)
+def getNewTarget() {
+  def currentTarget = getCurrentTarget()
+  def newTarget = ""
+  if (currentTarget == "blue") {
+      newTarget = "green"
+  } else if (currentTarget == "green") {
+      newTarget = "blue"
+  } else {
+    echo "OOPS, wrong target"
+  }
+  return newTarget
+}