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Kubernetes Clusters on AWS with Rancher

With these Terraform configuration files you can create Kubernetes clusters on AWS using both EC2 and EKS options with Rancher.

Before using these configurations files, you need to have Rancher deployed in your preffered environment and you need to configure the network connection requirements between your Rancher Server and AWS.

File Structure

You can see there are seperate files for both EC2 and EKS cluster configurations. All of the configurations use variables whenever possible. You need to update variables file according to your needs.

Cluster Informations

  • EC2 Cluster
    • EC2 Cluster has 3 controlplane nodes and 3 worker nodes. You can change the node counts but it is recommended to use multiple controlplane nodes (odd numbers) for HA Configuration.
    • Both controlplane and worker nodes have different node template configurations. There is a file for these node templates that you can update the values from node-templates. You need to update the configurations for these node templates according to your needs.
    • You need to update variables file.
  • EKS Cluster
    • EKS Cluster's controlplane is managed by AWS. You don't have to deploy controlplane when using EKS.
    • There is one node group for worker nodes in EKS cluster. You can change min_size, desired_size and max_size values according to your needs.
    • You can change the Kubernetes version.
    • You need to update variables file.

Usage

After changing the values you can run terraform init command to initialize Terraform.

  • You can run terraform plan and terraform apply for creating the resources.
  • You can run terraform destroy for destroying the resources.