#!groovy
def runs = (1..100)

// Mapping of parallel stages to run
def stepsForParallel = runs.collectEntries { runIndex ->
  ["Parallel Stage ${runIndex}" : transformIntoStep(runIndex)]
}

node('ec2-worker') {
  stage('Root') {
    parallel stepsForParallel
  }
}

def transformIntoStep(runIndex) {
  return {
    node('ec2-worker') {
      stage("Run ${runIndex}") {
        echo "test string"
        sleep 360
      }
    }
  }
}