Deploy Helm charts into Kubernetes with Jenkins job - jenkins

Question

I want to create a Jenkins job which deploys Helm chart into Kubernetes cluster.
Helm charts are stored into Bitbucket repository.
pipeline {
agent any
stages {
stage('Download Helm Charts') {
steps {
sh "echo 'Downloading Helm Charts from Bitbucket repository...'"
git checkout http://192.168.1.30:7990/scm/jen/helm.git
// not sure do I need ot point the root folder of the Helm repository or only the single chart
}
}
stage('Test Kubernetes version') {
steps {
sh "echo 'Checking Kubernetes version..'"
// How to do remote test of kubernetes version
}
}
stage('Push Helm Charts to Kubernetes') {
steps {
sh "echo 'building..'"
// push here helm chart from Jenkins server to Kubernetes cluster
}
}
stage('Build Image') {
steps {
sh "echo 'building..'"
git checkout http://192.168.1.30:7990/scm/jen/spring-boot-microservice.git
// execute Java -jar ... and build docker image
}
}
stage('Push Image into Nexus registry') {
steps {
sh "echo 'building..'"
// push compiled docker image into Nexus repository
}
}
stage('Deploy Image from Nexus registry into Kubernetes') {
steps {
sh "echo 'building..'"
}
}
stage('Test'){
steps {
sh "echo 'Testing...'"
// implement a check here is it deployed sucessfully
}
}
}
}
What configuration I need to add into this Jenkins file in order to download Heml chart repository from bitbucket and apply the configuration into Kubernetes cluster?
Can you give me an example for such a Jenkins file?

Answer 1

Assuming your Pipeline is already in Bitbucket repo where Helm charts reside. Following is a example structure of the repo.
jenkins
├── app1-charts
│   ├── Chart.yaml
│   ├── templates
│   │   ├── app1.yml
│   │   └── _helpers.tpl
│   └── values.yaml
└── Jenkinsfile
The Jenkinsfile in the root directory would have a simple Pipeline like below.
pipeline {
agent any
stages {
stage('Build1') {
steps {
echo "Doing some build here if you need"
}
}
stage('Applying helm charts') {
steps {
echo "Running Helm"
sh "helm upgrade --wait --timeout 60 --set image.tag=${SOME_INPUT} app1-name ./app1-charts"
}
}
}
}
The above Pipeline assumes that you have Helm setup in the Jenkins agents. Now in Jenkins, you can create a New Pipeline Job and select the option Pipeline Script from SCM, and then provide the Bitbucket configurations.
Make sure the Script Path is set to point to your Jenkinsfile. Also, make sure Lightweight checkout is unchecked.
Once you add the configurations this will clone the repo with your helm charts and run the Pipeline in the repo which will execute the Helm charts.
Update: Pipeline to checkout bitbucket repo
Check the following Pipeline example. You may have to generate an access token with the necessary permissions to checkout the repo if the repo is Private.
pipeline {
agent any
stages {
stage('checkout') {
steps {
echo 'Checking out code from bitbucket'
git(url: 'https://x-token-auth:REPO_ACCESS_TOKEN#bitbucket.org/ORG_NAME/your-repo.git', branch: 'master')
sh """
cd your-helm-directory
helm install .............. Or whatever command you need
"""
}
}
}
}