matrixPostInsideStage.pipeline

pipeline {
  agent any
  stages {
    stage('matrix') {
      matrix {
        axes {
          axis {
            name 'REALVALUE'
            values '1', '2', '3'
          }
        }
        stages {
          stage('equal to 1?') {
            steps {
              sh "test 1 -eq ${REALVALUE}"
            }
            post {
              success {
                echo "We are the champions."
              }
              failure {
                echo "You lost."
              }
            }
          }
        }
      }
    }
  }
}

matrixWithPost.pipeline

pipeline {
  agent any
  stages {
    stage('matrix') {
      matrix {
        axes {
          axis {
            name 'REALVALUE'
            values '1', '2', '3'
          }
        }
        stages {
          stage('equal to 1?') {
            steps {
              sh "test 1 -eq ${REALVALUE}"
            }
          }
        }
        post {
          success {
            echo "We are the champions."
          }
          failure {
            echo "You lost."
          }
        }
      }
    }
  }
}