How to run multiple stages on the same node with declarative Jenkins pipeline?

Question

Goal
Run multiple stages of a declarative Jenkins pipeline on the same node.

Setup
This is just a minimal example to show the p

Answer 1

replace agent none with agent any

Answer 2

You could define stages inside a script block. Those stages are kind of sub-stages of a parent stage running in a given agent. That was the approach that I had to use in a similar use case than yours.

#!groovy

windowsNode = 'windows'

pipeline {
  agent none
  stages {
    stage('Stage A') {
      agent {
        label windowsNode
      }
      steps {
        script {

          stage('Stage 1') {        
            windowsNode = NODE_NAME
            echo "windowsNode: $windowsNode, NODE_NAME: $NODE_NAME"
          }

          stage('Stage 2') {
            echo "windowsNode: $windowsNode, NODE_NAME: $NODE_NAME"
          }
        }
      }
    }
  }
}

Answer 3

Since version 1.3 of Declarative Pipeline plugin, this is officially supported. It's officially called "Sequential Stages".

pipeline {
    agent none

    stages {
        stage("check code style") {
            agent {
                docker "code-style-check-image"
            }
            steps {
                sh "./check-code-style.sh"
            }
        }

        stage("build and test the project") {
            agent {
                docker "build-tools-image"
            }
            stages {
               stage("build") {
                   steps {
                       sh "./build.sh"
                   }
               }
               stage("test") {
                   steps {
                       sh "./test.sh"
                   }
               }
            }
        }
    }
}

Official announcement here: https://jenkins.io/blog/2018/07/02/whats-new-declarative-piepline-13x-sequential-stages/

Answer 4

I have found that this works as you would expect

#!groovy

windowsNode = 'windows'

pipeline {
    agent none
    stages {
        stage('Stage 1') {
            steps {
                node(windowsNode) {
                    script {
                        // all subsequent steps should be run on the same windows node
                        windowsNode = NODE_NAME
                    }
                    echo "windowsNode: $windowsNode, NODE_NAME: $NODE_NAME"
                }
            }
        }
        stage('Stage 2') {
            steps {
                node(windowsNode) {
                    echo "windowsNode: $windowsNode, NODE_NAME: $NODE_NAME"
                }
            }
        }
    }
}