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() {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"
}
}
}
}
}
}
}