pipeline {
  agent {
    label 'docker_host'
  }
  stages {
    stage('create file') {
      steps {
        dir('subdir') {
          sh 'touch newFileInSubDir'
        }
      }
    }
    stage('Test file exists in subdir') {
      agent {
        docker {
          image 'debian:stable-slim'
          reuseNode true
          customWorkspace 'subdir'
        }
      }
      steps {
        sh "ls -laR"
        sh "test -f newFileInSubDir"
      }
    }
  }
  post {
    always {
      deleteDir()
    }
  }
}