Extending development environment 02

In this guide, you’ll continue enhancing your development workflow on Google Kubernetes Engine (GKE). We’ll cover cluster access, namespace isolation, manifest updates, automated builds, and deployment verification.

Prerequisites

• A GCP project with a running GKE cluster
• gcloud CLI and kubectl installed and configured
• A GitHub repository connected to Cloud Build triggers

1. Connect to the Cluster and Create a Namespace

1.1 Launch Cloud Shell

1. Navigate to Google Cloud Console > Kubernetes Engine > Clusters.
2. Select your cluster and click Connect to open Cloud Shell.
3. Press Enter to run the pre-populated kubectl authentication command.

gcloud components update

1.2 Create and Verify the Development Namespace

# List current namespaces
kubectl get namespaces

# Create a new namespace for development
kubectl create namespace development

# Confirm the namespace was created
kubectl get namespaces

2. Update the gke.yaml Manifest

Open your gke.yaml file. This manifest defines both the Service and Deployment for your application. Modify it to point at the development namespace and use your development Docker image.

2.1 Resource Overview

2.2 Updated Manifest Snippet

apiVersion: v1
kind: Service
metadata:
  name: gcp-devops-gke-service
  namespace: development
  labels:
    app: gcp
spec:
  type: LoadBalancer
  ports:
    - protocol: TCP
      port: 80
      targetPort: 5000
  selector:
    app: gcp
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: gcp-devops-gke
  namespace: development
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gcp
  template:
    metadata:
      labels:
        app: gcp
    spec:
      containers:
        - name: gcp-devops-gke
          image: gcr.io/kodekloud-gcp-training/gcpdevops-dev:latest
          ports:
            - containerPort: 5000
          env:
            - name: PORT
              value: "5000"

Save your changes and push to the development branch:

git add gke.yaml
git commit -m "chore: update manifests for development namespace"
git push origin development

This push will trigger your Cloud Build configuration.

3. Verify the Cloud Build Trigger

After pushing, open your GitHub repository to confirm that a Cloud Build trigger has started on the development branch.

4. Review Build and Deployment Logs

Go back to the GCP Console and navigate to Cloud Build. You’ll see logs for steps including:

• Building the Docker image
• Pushing to Container Registry
• Deploying to GKE

All steps should complete without errors.

5. Inspect the Deployment in GKE

1. In the GCP Console, go to Kubernetes Engine > Workloads and filter by the development namespace.
   • Workload: gcp-devops-gke
2. Then select Services & Ingress, keeping the development filter applied.
3. Copy the external LoadBalancer IP and open it in your browser to verify your app is running.

You’ve successfully set up a dedicated development namespace, updated your Kubernetes manifests for development artifacts, and confirmed an automated CI/CD pipeline. Future commits to the development branch will automatically build and deploy your application to GKE.

Links and References

• Kubernetes Namespaces
• Google Kubernetes Engine Documentation
• Cloud Build Triggers
• kubectl CLI Reference