Jenkins: execute pytest on remote machines

Jenkinsfile

library 'openstack'

def target_ip
def vm_id

pipeline {
  agent any
  
  parameters {
    choice(choices: "IntegEnv\ProdEnv\TestEnv", description: "Environment", name: 'TESTENV')
  }
  
  stages {
    stage ('Start Virtual Machine') {
      steps {
        script {
          vm_id = openstack.getVMIdByName("testautomat-${params.TESTENV}")
          target_ip = openstack.getVMIpById(vm_id)
        }
        echo "waiting for ${target_ip} to be up"
        timeout(5) { //minutes
          waitUntil {
            script {
              def r = sh script: "nc -zv ${target_ip} 22", returnStatus: true
              return (r == 0);
            }
          }  
        }
      }
    }
  
    stage('Prepare Test Runner') {
      steps {
        sh "ssh -i /home/jenkins/myKey jenkins@${target_ip} \"rm -rf /opt/smoketest && cd /opt && mkdir smoketest && git clone ssh://jenkins/home/git/gitea-repositories/smoketest.git\""
        sh "ssh -i /home/jenkins/myKey jenkins@${target_ip} \"cd /opt/smoketest && pip install -r requirements.txt\""
      }
    }
  
    stage('Run Test') {
      steps {
        sh "ssh -i /home/jenkins/myKey jenkins@${target_ip} \"/opt/smoketest/run_test.sh ${params.TESTENV}\""
      }
    }
  
    stage('Stop VM') {
      steps {
        echo "Stopping VM"
        script {
          openstack.stopVM(vm_id)
        }
      }
    }
  }
  
  post {
    failure {
      mail to: 's166205@hft-leipzig.de, stakeholder@company.com',
      subject: "Failed Pipeline: ${currentBuild.fullDisplayName}",
      body: "Something is wrong with ${env.BUILD_URL}"
	  }
  }
}