podTemplate(
    namespace: 'ci-space-test', label: 'mypod',
    containers: [
      containerTemplate(name: 'jnlp', image: 'jenkins/jnlp-slave:3.10-1-alpine', args: '${computer.jnlpmac} ${computer.name}')
    ]) {

    node ('mypod') {
        container(name: 'jnlp') {
            sh "cat /var/run/secrets/kubernetes.io/serviceaccount/namespace"
        }
    }
}

pipeline {
    agent {
        kubernetes {
            label 'unique-pod-name'
            defaultContainer 'container1'
            yaml """
apiVersion: v1
kind: Pod
metadata:
  namespace: my-pod-namespace
spec:
  containers:

  - name: container1
    image: centos:7
    command:
    - cat
    tty: true
"""
        }
    }
    stages {
        stage('Print config') {
            steps {
                container('container1') {
                    sh 'echo "in container container1"'
                    sh 'env | sort'
                }
            }
        }
    }
}