feat: add support for EKS Auto Mode

[romulofranca]

what

• Added support for EKS Auto Mode.
• Introduced new variables to control Auto Mode: cluster_auto_mode_enabled, node_pools, create_node_role, and node_role_arn.
• Updated the aws_eks_cluster resource to handle compute_config, elastic_load_balancing, and storage_config for Auto Mode.
• Implemented validation to prevent enabling Auto Mode with self-managed addons.
• Created new IAM policies and roles to support Auto Mode (auto_mode_policies, node_assume_role, and related attachments).
• Updated the default Kubernetes version to 1.32.
• Improved outputs to handle optional values using try() to support scenarios without node groups.
• Added a new automated test TestExamplesAutoMode to validate Auto Mode functionality.
• Updated Go module dependencies to ensure compatibility with Kubernetes 1.32.

why

• EKS Auto Mode is a new AWS feature that simplifies node management by removing the need for self-managed node groups.
• Adding Auto Mode support allows users to opt for fully managed compute configurations without losing flexibility.
• Keeping the module updated with Kubernetes 1.32 ensures compatibility with the latest EKS features.
• Introducing dynamic outputs and IAM role handling improves the module's robustness when switching between Auto Mode and managed node groups.
• Automated tests ensure the new functionality works reliably and prevent regressions in future updates.

references

• Related to EKS Auto Mode announcement: https://docs.aws.amazon.com/eks/latest/userguide/eks-auto-mode.html

• Related PRs and discussions:

  • https://github.com/cloudposse/terraform-aws-eks-cluster/issues/246 (Related Issue)
  • https://github.com/cloudposse/terraform-aws-eks-cluster/pull/249 (Previous Auto Mode PR attempt)

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📝 Walkthrough

Walkthrough

This change set introduces support for EKS Auto Mode, adding new variables and logic to manage compute resources and IAM roles conditionally. It updates the Kubernetes version to 1.32, modifies module and output configurations to handle optional node group creation, and adds validation and dependency management for the new features. Tests and dependencies are updated accordingly.

Changes

Files/Paths	Change Summary
examples/complete/fixtures.us-east-2.tfvars, examples/complete/variables.tf	Updated Kubernetes version from "1.29" to "1.32". Added variables for EKS Auto Mode: cluster_auto_mode_enabled, node_pools, create_node_role, and node_role_arn.
examples/complete/main.tf	Passed new variables to the eks_cluster module. Node group creation is now conditional based on cluster_auto_mode_enabled.
examples/complete/outputs.tf	Outputs for node group now use try() and index access for safety if node group is not created.
iam.tf	Added logic for conditional creation and attachment of an IAM node role and policies. Extended assume role and policy attachments for EKS Auto Mode.
main.tf	Added support for EKS Auto Mode in the cluster resource, including dynamic blocks, lifecycle precondition, and extended dependencies.
outputs.tf	Added output for node_role_arn representing the ARN of the node IAM role used.
variables.tf	Introduced variables for EKS Auto Mode, node pool validation, and node role management, with input validation logic.
test/src/examples_complete_test.go	Added TestExamplesAutoMode to test EKS Auto Mode provisioning and output validation.
test/src/go.mod	Updated Go version, toolchain, and upgraded Kubernetes and related dependencies. Added and removed several indirect dependencies.

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[mergify[bot]]

💥 This pull request now has conflicts. Could you fix it @romulofranca? 🙏

[gberenice]

/terratest

[mergify[bot]]

[!IMPORTANT]

Cloud Posse Engineering Team Review Required

This pull request modifies files that require Cloud Posse's review. Please be patient, and a core maintainer will review your changes.

To expedite this process, reach out to us on Slack in the #pr-reviews channel.

[Nuru]

@romulofranca Thank you very much for this substantial effort!

Unfortunately, this major a PR requires a lot of thoughtful review, not only for its impact on this module, but also for how it coordinates with our other modules such as eks-node-group, and components such as eks-alb-controller and eks-karpenter-node-pool. Given our current workload and resources, it may be quite a while before we get to this.

[SasquatchCorgi]

Any plans on wrapping the work in this PR up before EoY 2025?

[mergify[bot]]

💥 This pull request now has conflicts. Could you fix it @romulofranca? 🙏

[Firaenix]

I'd love this to be merged, I'm considering swapping to a different EKS TF module but cloudposse ones are by far the best