How to Deploy a Managed Kubernetes on Amazon AWS

How to Deploy a Managed Kubernetes on Amazon AWS

Introduction

Amazon Elastic Kubernetes Service (EKS) is a managed Kubernetes service that makes it easy to deploy, manage, and scale Kubernetes applications in the AWS cloud. EKS provides a Kubernetes cluster with all the necessary components, such as the control plane, worker nodes, and networking. You can use EKS to deploy and manage your Kubernetes applications without having to worry about the underlying infrastructure.

Prerequisites

• An AWS account
• The AWS CLI
• kubectl

Steps

Step 1: Create an EKS Cluster To begin, you’ll need to create an Amazon EKS cluster. You have two options for this: using the AWS Management Console or the AWS CLI.

Using the AWS Management Console:

1. Go to the EKS console by visiting this link.
2. Click on Create cluster.
3. Provide a name for your cluster and select the desired cluster version.
4. Choose the VPC and subnets for your cluster.
5. Configure the IAM role for your cluster.
6. Click Create.

Using the AWS CLI: Run the following command, replacing the placeholders with your own values:

aws eks create-cluster \
--name my-cluster \
--version 1.23.6 \
--role-arn arn:aws:iam::123456789012:role/my-eks-role \
--vpc-id vpc-12345678 \
--subnets subnet-12345678,subnet-23456789,subnet-34567890

Step 2: Wait for Cluster Creation It may take a few minutes for your EKS cluster to be created. You can monitor the progress using either the AWS Management Console or the AWS CLI.

Step 3: Get the Kubernetes Configuration File To interact with your EKS cluster using kubectl, you need to obtain the Kubernetes configuration file.

Using the AWS Management Console:

1. Visit the EKS console.
2. Select your cluster.
3. Click on Download Kubernetes configuration.

Using the AWS CLI: Run this command:

aws eks describe-cluster \
--name my-cluster \
--query "cluster.kubeconfig" \
--output text > kubeconfig

Step 4: Configure kubectl To ensure that kubectl connects to your EKS cluster, you must specify the path to the Kubernetes configuration file. You can achieve this by setting the KUBECONFIG environment variable:

export KUBECONFIG=kubeconfig

Step 5: Verify the Connection Confirm that you can successfully connect to your EKS cluster by running the following command:

kubectl get nodes

This command should display a list of the worker nodes within your cluster.

Step 6: Deploy Your Kubernetes Application With kubectl configured, you are now ready to deploy your Kubernetes application on the EKS cluster.

By following these steps, you’ll be able to create, configure, and deploy applications on your Amazon EKS cluster effectively.

Example

The following example shows how to deploy a simple Kubernetes application to an EKS cluster:

kubectl create deployment my-app --image nginx
kubectl expose deployment my-app --type LoadBalancer

This will create a deployment called my-app that runs the Nginx container image. It will also expose the deployment as a LoadBalancer service.

You can access your application by running the following command:

kubectl get service my-app -o jsonpath='{.status.loadBalancer.ingress[0].ip}'

This will output the IP address of the LoadBalancer service. You can then open this IP address in a web browser to access your application.

Conclusion

EKS is a managed Kubernetes service that makes it easy to deploy, manage, and scale Kubernetes applications in the AWS cloud. You can use EKS to deploy and manage your Kubernetes applications without having to worry about the underlying infrastructure.