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Oluwabamidele Ayanda
Oluwabamidele Ayanda

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Bash Script : How to Create a k8s Cluster on AWS EKS using eksctl.

This article is a simple shell script tutorial about automating your kubernetes cluster setup on Amazon Elastic Kubernetes Service (EKS).

AWS EKS: Amazon Elastic Kubernetes Service (EKS) is a managed service and certified Kubernetes conformant to run Kubernetes on AWS and on-premises.

Eksctl: is a simple CLI tool for creating and managing clusters on EKS - Amazon's managed Kubernetes service for EC2.


Create an access key for your IAM user

  • Login into your AWS account
  • Go to IAM dashboard
  • Select Users and click on your IAM user name
  • Click on Security Credential Tab
  • Scroll down to Access keys and Click on Create access key
  • Select Command Line Interface (CLI), agree with recommendation click Next and follow the prompts.

access key

Configure AWS CLI

# In your CLI, configure AWS cli with your access keys
aws configure
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aws configure

Create a file with permission

# Create file

# Make execute permission
chmod +x
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Copy and paste the code snippet below. Change the variables to your preferred names and values. Also change the values under the Creation of EKS cluster to preferred cluster requirements.

# Variables

# Set AWS credentials before script execution

aws sts get-caller-identity >> /dev/null
if [ $? -eq 0 ]
  echo "Credentials tested, proceeding with the cluster creation."

  # Creation of EKS cluster
  eksctl create cluster \
  --name $CLUSTER_NAME \
  --version 1.22 \
  --region $REGION \
  --nodegroup-name $NODE_NAME \
  --nodes 2 \
  --nodes-min 1 \
  --nodes-max 4 \
  --node-type t3.micro \
  --node-volume-size 8 \
  --ssh-access \
  --ssh-public-key $KEY_NAME \

  if [ $? -eq 0 ]
    echo "Cluster Setup Completed with eksctl command."
    echo "Cluster Setup Failed while running eksctl command."
  echo "Please run aws configure & set right credentials."
  echo "Cluster setup failed."

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Make sure the key pair is in the same directory with the script or you specify.


aws sts get-caller-identity - checks if the AWS identity is created correctly. if [ $? -eq 0 ] - check if the last command, in this case aws sts get-caller-identity succeeded without no error. If it equals 0, it should go ahead and create the cluster. After the cluster is created, print a created message else inform us the AWS credential was not configured correctly.

eks cluster

Cluster Nodes on EC2 dashboard


Clean Up

  # Delete EKS Cluster
  eksctl delete cluster my-cluster
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delete cluster

As always, I look forward to getting your thoughts on this article. Please feel free to leave a comment!

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