CODEWITHSUNDEEP
dockerjenkinskubernetesjenkins-pipeline
Lars Bilke
Lars Bilke

Reputation: 5229

Jenkins Kubernetes plugin: How to build image from Dockerfile and run steps inside the image

I am using the Jenkins kubernetes-plugin. Is it possible to build a docker image from a Dockerfile and then run steps inside the created image? The plugin requires to specify an image in the pod template so my first try was to use docker-in-docker but the step docker.image('jenkins/jnlp-slave').inside() {..} fails:

pipeline {
  agent {
    kubernetes {
      //cloud 'kubernetes'
      label 'mypod'
      yaml """
apiVersion: v1
kind: Pod
spec:
  containers:
  - name: docker
    image: docker:1.11
    command: ['cat']
    tty: true
    volumeMounts:
    - name: dockersock
      mountPath: /var/run/docker.sock
  volumes:
  - name: dockersock
    hostPath:
      path: /var/run/docker.sock
"""
    }
  }
  stages {
    stage('Build Docker image') {
      steps {
        git 'https://github.com/jenkinsci/docker-jnlp-slave.git'
        container('docker') {
          sh "docker build -t jenkins/jnlp-slave ."
          docker.image('jenkins/jnlp-slave').inside() {
            sh "whoami"
          }
        }
      }
    }
  }
}

Fails with:

WorkflowScript: 31: Expected a symbol @ line 31, column 11.
             docker.image('jenkins/jnlp-slave').inside() {

Upvotes: 4

Views: 4610

Answers (2)

Vinay Kadalagi
Vinay Kadalagi

Reputation: 1405

 container('docker') {
        script {
        def image = docker.build("cusdock","CustomImage")
        image.inside(){
          sh "docker info"
        }
    }
 }

Here CustomImage is the directory inside your git repo which contains Dockerfile which will build your custom image. That image will be build and tagged as cusdock docker info will be run inside your custom docker image.

Upvotes: 0

Lars Bilke
Lars Bilke

Reputation: 5229

As pointed out by Matt in the comments this works:

pipeline {
  agent {
    kubernetes {
      //cloud 'kubernetes'
      label 'mypod'
      yaml """
apiVersion: v1
kind: Pod
spec:
  containers:
  - name: docker
    image: docker:1.11
    command: ['cat']
    tty: true
    volumeMounts:
    - name: dockersock
      mountPath: /var/run/docker.sock
  volumes:
  - name: dockersock
    hostPath:
      path: /var/run/docker.sock
"""
    }
  }
  stages {
    stage('Build Docker image') {
      steps {
        git 'https://github.com/jenkinsci/docker-jnlp-slave.git'
        container('docker') {
          script {
            def image = docker.build('jenkins/jnlp-slave')
            image.inside() {
              sh "whoami"
            }
          }
        }
      }
    }
  }
}

Upvotes: 5

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