KodeKloud Notes

In Sprint 0.5, we’ll extend our CI/CD pipeline to push Docker images into a Google Kubernetes Engine (GKE) cluster. By breaking this large goal into focused milestones, we improve visibility, estimation accuracy, and enable parallel work.

Why split into milestones?

Breaking down tasks helps with:

Tracking incremental progress
Clarifying deliverables
Providing more accurate time estimates
Allowing multiple team members to work concurrently

Milestone Breakdown

Step	Goal	Example Command
1. Create Namespace	Isolate resources in the cluster	`kubectl create namespace my-app`
2. Write Deployment Manifest	Define your Kubernetes Deployment	See `deployment.yaml` below
3. Update Cloud Build	Apply manifests in your build pipeline	See `cloudbuild.yaml` snippet
4. Validate Deployment	Ensure pods and services are running	`kubectl get all -n my-app`

The image lists four steps for a deployment process: creating a namespace in a GKE cluster, creating a deployment file, updating Cloud Build code, and validating the deployment.

1. Create a GKE Namespace

Define an isolated namespace before any resources are applied:

# namespace.yaml
apiVersion: v1
kind: Namespace
metadata:
  name: my-app

Apply it in your pipeline or manually:

kubectl apply -f namespace.yaml

2. Prepare the Deployment Manifest

Create deployment.yaml to describe your application pods and replicas:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app-deployment
  namespace: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app
        image: gcr.io/PROJECT_ID/my-app:latest
        ports:
        - containerPort: 8080

3. Update Your Cloud Build Configuration

Modify your cloudbuild.yaml to include steps for namespace creation and manifest application:

steps:
  - name: gcr.io/cloud-builders/kubectl
    args:
      - apply
      - -f
      - namespace.yaml
  - name: gcr.io/cloud-builders/kubectl
    args:
      - apply
      - -f
      - deployment.yaml
images:
  - gcr.io/PROJECT_ID/my-app:$SHORT_SHA

For more details on Cloud Build, see the Cloud Build documentation.

4. Validate the Deployment

After Cloud Build finishes, confirm that your pods and services are up:

kubectl get all -n my-app

The image lists four steps for a deployment process: creating a namespace in a GKE cluster, creating a deployment file, updating Cloud Build code for deployment, and validating the deployment.

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