R1-TRAINING-Jenkinsfile

#!groovy

APP_NAME = "embcess-r1-training"
IMAGESTREAM_NAME = "embcess-r1"
PROJECT_NAMESPACE = "jhnamn"
DOTNET_SKIP_FIRST_TIME_EXPERIENCE="true"

class AppEnvironment {
  String name
  String env
  String tag
  String previousTag
}

// EDIT LINE BELOW (Edit your environment TAG names)
environments = [
  dev:new AppEnvironment(name:"Development",env:"dev",tag:"dev",previousTag:"dev-previous"),
  test:new AppEnvironment(name:"Test",env:"test",tag:"test",previousTag:"test-previous"),
  training:new AppEnvironment(name:"Training",env:"test",tag:"training",previousTag:"training-previous"),
  prod:new AppEnvironment(name:"Prod",env:"prod",tag:"Prod",previousTag:"Prod-previous")
]

// You shouldn't have to edit these if you're following the conventions
ARTIFACT_BUILD = APP_NAME
RUNTIME_CHAINED_BUILD = "${APP_NAME}"
PATHFINDER_URL = "pathfinder.gov.bc.ca"

// Gets the container hash for the latest image in an image stream
def getLatestHashTestEnv(imageStreamName) {
  return sh (
    script: """oc get istag ${imageStreamName}:test -o=jsonpath='{@.image.metadata.name}' | sed -e 's/sha256://g'""",
    returnStdout: true
  ).trim()
}

// Gets the container hash for the latest image in an image stream
def getLatestHash(imageStreamName) {
  return sh (
    script: """oc get istag ${imageStreamName}:latest -o=jsonpath='{@.image.metadata.name}' | sed -e 's/sha256://g'""",
    returnStdout: true
  ).trim()
}

// Gets all tags already applied to this ImageStream (as a single string); e.g., 'dev test dev-previous my-other-tag ...'
def getAllTags(imageStreamName) {
  return sh (
    script: """oc get is ${imageStreamName} -o template --template='{{range .status.tags}}{{" "}}{{.tag}}{{end}}'""",
    returnStdout: true
  ).trim()
}

// Checks whether we are running this pipeline for the first time by looking at what tags are available on the application's ImageStream
def tagExists(tagName, imageStream) {
  def tags = getAllTags(imageStream)
  def entries = tags.split(" ")
  for (entry in entries) {
    if (entry == tagName) {
      return true
    }
  }
  return false
}

def buildAndVerify(buildConfigName) {
  echo "Building: ${buildConfigName}"
  openshiftBuild(
    bldCfg: buildConfigName,
    showBuildLogs: 'true',
    waitTime: '1200000'
  )
  openshiftVerifyBuild(
    bldCfg: buildConfigName,
    showBuildLogs: 'true',
    waitTime: '1200000'
  )
}

def tagImage(srcHash, destination, imageStream) {
  echo "Tagging $imageStream with $destination"
  openshiftTag(
    destStream: imageStream,
    verbose: 'true',
    destTag: destination,
    srcStream: imageStream,
    srcTag: srcHash,
    waitTime: '1200000'
  )
}

// Keeps a copy of last good known configuration for a deployment (just in case)
def tagLatestStable(environment, backupTag, imageStream) {
  // skip this on the first run... there's nothing to backup!
  if (tagExists(environment, imageStream)) {
    tagImage(environment, backupTag, imageStream)
  }
}

def deployAndVerify(srcHash, environment, imageStream) {
  echo "Deploying ${APP_NAME} to ${environment}"
  // verify deployment to an environment; e.g. [your-project-name]-dev
  openshiftVerifyDeployment(
    deploymentConfig: APP_NAME,
    namespace: "${PROJECT_NAMESPACE}-${environment}",
    waitTime: '1200000'
  )
}

// Generates a string representation of the current code changes that triggered a build
def getChangeString() {
  def MAX_MSG_LEN = 512
  def changeString = ""
  def changeLogSets = currentBuild.changeSets
  for (int i = 0; i < changeLogSets.size(); i++) {
    def entries = changeLogSets[i].items
    for (int j = 0; j < entries.length; j++) {
      def entry = entries[j]
      truncated_msg = entry.msg.take(MAX_MSG_LEN)
      changeString += " - ${truncated_msg} [${entry.author}]\n"
    }
  }
  if (!changeString) {
    changeString = "No changes"
  }
  return changeString
}

def notifyGood(title, description) {
  // TODO: Send notifications to Slack
  echo title
  if (description) {
    echo description
  }
}

def notifyError(title, description) {
  // TODO: Send notifications to Slack
  echo title
  if (description) {
    echo description
  }
}

node('master') {
  
  stage('Confirm') {
	  input ("Confirm TRAINING deployment")
	}
  
  // Deployment Process for R1 using the single image stream "embcess-r1"
  // 1. dev tag: image built using r1develop-pipeline
  // 2. test tag: copy from latest
  // 3. training tag: copy from test tag
  // 4. prod tag: copy from training tag

  stage("Deploy to ${environments.training.name}") {
    def environment = environments.training.env
    def newTag = environments.training.tag	  
    def stableTag = environments.training.previousTag
    node {
      try {
        // hold on to a copy of the last stable TRAINING environment (in case the upcoming deployment fails...)
        tagLatestStable(environment, stableTag, IMAGESTREAM_NAME)
        // Deployment to Training must come from Test Env. Get the latest test image. 
        IMAGE_HASH = getLatestHashTestEnv(IMAGESTREAM_NAME)
	    tagImage(IMAGE_HASH, newTag, IMAGESTREAM_NAME)
        deployAndVerify(IMAGE_HASH, environment, IMAGESTREAM_NAME)
        // all is good!
        notifyGood(
          "New ${APP_NAME} in ${environment} :)",
          "Changes: ${getChangeString()}"
        )
      } catch(error) {
        notifyError(
          "Couldn't deploy ${APP_NAME} to ${environment} :(",
          "Error: '${error.message}'"
        )
        throw error
      }
    }
  }
}