Module 11 - Kubernetes on AWS - EKS

This repository contains a demo project created as part of my DevOps studies in the TechWorld with Nana – DevOps Bootcamp.

Demo Project: CD - Deploy to DigitalOcean Kubernetes cluster from Jenkins Pipeline

Technologies used: Kubernetes, Jenkins, DigitalOcean Kubernetes, Docker, Linux

Project Description:

• Create K8s cluster on DigitalOcean
• Install kubectl as Jenkins Plugin
• Adjust Jenkinsfile to use Plugin and deploy to DigitalOcean Kubernetes cluster

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1. Create a K8s Cluster on DigitalOcean

1. Create a minimal Kubernetes cluster with 1 node in the DigitalOcean console.

   

2. Download the kubeconfig file and set it as your active context:

   export KUBECONFIG=k8s-kubeconfig.yaml

2. Configure a Multibranch Pipeline in Jenkins

1. Go to Dashboard → New Item.

2. Name it k8s-digital-ocean, select Multibranch Pipeline, and click OK.

3. Under Branch Sources, click Add source → GitHub and fill in:

   Field	Value
   Credentials	github
   Repository HTTPS URL	https://github.com/explicit-logic/eks-module-11.5

   Click Validate to confirm access.

4. Under Behaviors, click Add and enable:

   • Discover branches

5. Under Build Configuration, set:

   • Script Path: Jenkinsfile

6. Click Save — Jenkins will scan the repository and create a job for each branch.

Store Credentials in Jenkins

1. Navigate to k8s-digital-ocean → Credentials → Global → Add Credentials.

2. Select Secret file as the credential type.

3. Upload the kubeconfig file of your DigitalOcean K8s cluster.

4. Set the ID to digitalocean.

   

3. Install the Kubernetes CLI Jenkins Plugin

1. Navigate to Manage Jenkins → Plugins → Available plugins.

2. Search for Kubernetes CLI and install it.

   

3. Restart Jenkins to complete the installation.

   Note: SSH into the Jenkins server and start the Jenkins container again if running in Docker.

4. Configure the Jenkinsfile to Deploy to the K8s Cluster

1. Retrieve the serverUrl from your kubeconfig file: clusters → cluster → server.

2. Add the following deploy stage to your Jenkinsfile:

   stage('deploy') {
       steps {
           script {
               echo "deploying docker image..."
               withKubeConfig([credentialsId: 'digitalocean', serverUrl: params.SERVER_URL]) {
                   sh 'kubectl create deployment nginx-deployment --image=nginx'
               }
           }
       }
   }

Demo