Jenkins 2 pipelie input example

jenkins-pipeline-input.groovy

stage('UA') {
    echo 'start'
    def answer = userWantToKeepCluster()
    echo "will keep cluster? $answer"
    echo 'done'
}
def userWantToKeepCluster() {
  try {
    timeout(time: 1, unit: 'MINUTES') {
        def keep = input message: 'Keep cluster?', 
                    parameters: [booleanParam(defaultValue: false, description: 'Make sure to destroy cluster manually after you done', name: 'keepCluster')]
        return keep
    }
  } catch(e) {
    return false
  }
}