Deploying workloads on EKS in AWS - Mini Project: Build & Apply

Deploying workloads on EKS

📖 Scenario: You are working as a cloud engineer for a company that wants to deploy a simple web application on Amazon Elastic Kubernetes Service (EKS). You will create the necessary Kubernetes deployment and service configuration files step-by-step to run the application on EKS.

🎯 Goal: Build a Kubernetes deployment and service manifest to deploy a web application on EKS. You will create the deployment YAML with the container image, add configuration for replicas, and expose the deployment with a service.

📋 What You'll Learn

Create a Kubernetes deployment manifest with a specific container image

Add a replica count configuration to the deployment

Define container port in the deployment

Create a Kubernetes service manifest to expose the deployment

💡 Why This Matters

🌍 Real World

Deploying containerized applications on EKS is a common task for cloud engineers to run scalable and managed workloads.

💼 Career

Understanding how to write Kubernetes manifests and deploy workloads on EKS is essential for cloud and DevOps roles.

1

Create the initial Kubernetes deployment manifest

Create a Kubernetes deployment manifest named deployment.yaml with the following exact content: apiVersion apps/v1, kind Deployment, metadata name webapp, and spec template with a container named webapp-container using the image nginx:1.21. Write the YAML content exactly as specified.

AWS

# Write the deployment manifest YAML with apiVersion apps/v1, kind Deployment, metadata name webapp, and container named webapp-container with image nginx:1.21
# Your code here

Need a hint?

Start by writing the YAML keys exactly as shown. Indentation matters in YAML.

2

Add replica count to the deployment

Add a replicas field with the value 3 under the spec section of the deployment manifest in deployment.yaml. This will run three copies of the web application.

AWS

apiVersion: apps/v1
kind: Deployment
metadata:
  name: webapp
spec:
  selector:
    matchLabels:
      app: webapp
  # Add replicas: 3 here
  template:
    metadata:
      labels:
        app: webapp
    spec:
      containers:
      - name: webapp-container
        image: nginx:1.21
# Your code here

Need a hint?

Place replicas: 3 directly under spec: at the same indentation level as selector: and template:.

3

Add container port to the deployment

Add a ports section under the container in the deployment manifest with a single port number 80. This tells Kubernetes which port the container listens on.

AWS

apiVersion: apps/v1
kind: Deployment
metadata:
  name: webapp
spec:
  selector:
    matchLabels:
      app: webapp
  replicas: 3
  template:
    metadata:
      labels:
        app: webapp
    spec:
      containers:
      - name: webapp-container
        image: nginx:1.21
        # Add ports section here
# Your code here

Need a hint?

Indent ports: under the container, then list - containerPort: 80.

4

Create a service to expose the deployment

Create a Kubernetes service manifest named service.yaml that exposes the deployment webapp on port 80 using type LoadBalancer. The service should select pods with label app: webapp. Write the YAML manifest exactly.

AWS

# Write the service manifest YAML with apiVersion v1, kind Service, metadata name webapp-service,
# spec type LoadBalancer, selector app: webapp, ports port 80 targetPort 80
# Your code here

Need a hint?

Use selector to match pods with label app: webapp. Set service type to LoadBalancer.