refact(eks): update modulo version 19.20.0 to 21.15.1

[pb-kaio-santos]

Upgrade EKS module to v21.0

This upgrade introduced multiple drifts and variable renames.
All drifts were resolved and deprecated variables were updated accordingly.

For detailed upgrade notes:
https://github.com/terraform-aws-modules/terraform-aws-eks/blob/master/docs/UPGRADE-21.0.md

[gemini-code-assist]

Summary of Changes

Hello @pb-kaio-santos, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a significant upgrade of the AWS EKS Terraform module to its latest major version. This update necessitated extensive refactoring of module inputs and variable definitions to ensure compatibility and leverage the new functionalities. The changes aim to keep the EKS infrastructure definitions current and robust, while also providing a new example for Terragrunt users.

Highlights

• EKS Module Upgrade: The AWS EKS Terraform module has been upgraded from version 19.20.0 to 21.15.1, incorporating the latest features and changes from the upstream module.
• Variable Refactoring: Numerous variables in main.tf and variables.tf were updated, renamed, or removed to align with the breaking changes and new input requirements of the upgraded EKS module.
• New Terragrunt Example: A new terragrunt.hcl example configuration was added to demonstrate the usage of the upgraded EKS module within a Terragrunt setup.

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Changelog

• aws/modules/eks/examples/terragrunt.hcl
  • Added a new Terragrunt example configuration for the EKS module.
• aws/modules/eks/main.tf
  • Updated the EKS module version from 19.20.0 to 21.15.1.
  • Adjusted module inputs to align with the new version's requirements, including name, kubernetes_version, endpoint_private_access, endpoint_public_access, kms_key_administrators, enable_irsa, addons, security_group_additional_rules, node_security_group_additional_rules, and tags.
  • Removed deprecated inputs such as cluster_name, cluster_version, cluster_addons, cluster_security_group_additional_rules, eks_managed_node_group_defaults, manage_aws_auth_configmap, aws_auth_roles, and aws_auth_users.
• aws/modules/eks/variables.tf
  • Renamed eks_version to kubernetes_version and updated its description.
  • Added explicit type definitions to all variables.
  • Updated descriptions for endpoint_private_access, endpoint_public_access, and vpc_id.
  • Removed deprecated variables including disk_size_gb, instance_type, additional_roles, ebs_service_account_role, manage_aws_auth_configmap, and aws_auth_users.
  • Introduced new variables addons, security_group_additional_rules, and node_security_group_additional_rules with default values.
  • Updated the eks_node_groups variable definition to include iam_role_additional_policies as an optional map.

Activity

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[gemini-code-assist]

Code Review

This pull request effectively upgrades the EKS Terraform module from v19.20.0 to v21.15.1. The changes correctly handle the breaking changes from the module upgrade, such as variable renames and a more flexible approach to configuring addons and security group rules. This refactoring improves the module's maintainability and usability. I've also noticed that explicit types have been added to many variables, which is a great improvement for code quality. My review includes a couple of minor suggestions to correct invalid Kubernetes versions used in an example file and a variable description to avoid confusion.