New features released in 0.9 include pipeline support and multiple containers per pod.

So now it is possible to define all the containers used in a job in your Jenkinsfile, for instance building a Maven project and a golang project in the same node without having to create any specific Docker image \o/

podTemplate(label: 'mypod', containers: [
    containerTemplate(name: 'maven', image: 'maven:3.3.9-jdk-8-alpine', ttyEnabled: true, command: 'cat'),
    containerTemplate(name: 'golang', image: 'golang:1.6.3-alpine', ttyEnabled: true, command: 'cat')
  ],
  volumes: [secretVolume(secretName: 'shared-secrets', mountPath: '/etc/shared-secrets')]) {

  node ('mypod') {
    stage 'Get a Maven project'
    git 'https://github.com/jenkinsci/kubernetes-plugin.git'
    container('maven') {
      stage 'Build a Maven project'
      sh 'mvn clean install'
    }

    stage 'Get a Golang project'
    git url: 'https://github.com/hashicorp/terraform.git'
    container('golang') {
      stage 'Build a Go project'
      sh """
      mkdir -p /go/src/github.com/hashicorp
      ln -s `pwd` /go/src/github.com/hashicorp/terraform
      cd /go/src/github.com/hashicorp/terraform && make core-dev
      """
    }

  }
}

Changelog:

• Make it possible to define more than one container inside a pod.
• Add new pod template step which allows defining / overriding a pod template from a pipeline script.
• Introduce pipeline step that allows choosing one of the containers of the pod and have all ‘sh’ steps executed there.
• allow setting dynamic pod volumes in pipelines
• Add support for persistent volume claims
• Add support for containerEnvVar’s in pipelines
• [JENKINS-37087] Handle multiple labels per pod correctly
• [JENKINS-37087] Iterate over all matching templates
• Fix slave description and labels
• [JENKINS-38829] Add help text for Kubernetes server certificate
• #59: Allow blank namespace and reuse whatever is discovered by the client.
• Ensure instanceCap defaults to unlimited
• Add Jenkins computer name to the container env vars
• Split arguments having quotes into account
• Allow the user to enable pseudo-TTY on container level.
• Use provided arguments without forcing jnlpmac and name into them. Provide placeholders for jnlpmac and name for the user to use. Fallback container uses as default arguments jnlpmac and name.
• Split volume classes into their own package (#77)