Sample EKS Terraform Script

Prerequisites:

0. A machine that will be used as k8s control plane
1. Install terraform. See https://learn.hashicorp.com/tutorials/terraform/install-cli.
2. Install aws cli. See https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html.
3. Configure aws by running aws configure and put in correct information
4. Generate ssh key by running ssh-keygen -t rsa -N '' -f ~/.ssh/id_rsa

Create EKS cluster

0. Download the files in this repo
1. Run terraform init
2. Run terraform apply -auto-approve. This step takes around 10-15 minutes. By default the EKS is deployed on 2 r5.2xlarge EC2 instances with k8s version 1.22
3. After the cluster is created, run aws eks update-kubeconfig --region us-east-1 --name <test-eks-xxxxxxxx>. The name is at the end of the stdout of step 2, in the form of test-eks-xxxxxxx

Destroy cluster

4. Run terraform destroy -auto-approve

EKS configuration

1. Cluster version: modify main.tf line 121
2. ec2 instance type: modify main.tf line 136
3. Launch on-demand ec2 instances instead of spot instances: comment out main.tf line 138, 139, 140
4. Launch different ec2 instance types: add another worker group in the form of main.tf line 134 - 150

If the control plane is an ec2 instance

Above commands are in ec2-setup.sh