AWS — EKS

What is EKS?

Managed Kubernetes service for running containerized applications.

Create cluster

aws eks create-cluster \
  --name my-cluster \
  --role-arn arn:aws:iam::123456789:role/eks-role \
  --resources-vpc-config subnetIds=subnet-xxx,xxx

Configure kubectl

aws eks update-kubeconfig --name my-cluster

Deploy application

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app
        image: nginx:latest
        ports:
        - containerPort: 80

kubectl apply -f deployment.yaml

Create service

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  type: LoadBalancer
  selector:
    app: my-app
  ports:
  - port: 80
    targetPort: 80

Node groups

aws eks create-nodegroup \
  --cluster-name my-cluster \
  --nodegroup-name my-nodes \
  --node-role arn:aws:iam::123456789:role/eks-node-role \
  --instance-types t3.medium \
  --scaling-config minSize=2,maxSize=5,desiredSize=3

Best practices

1. Use managed node groups
2. Enable cluster logging
3. Use IRSA for permissions
4. Set up cluster autoscaler

Mini Practice

1. Create an EKS cluster
2. Deploy a sample application
3. Expose with LoadBalancer
4. Scale the deployment

Up Next

Continue with DynamoDB - NoSQL Database.