Update metrics server version Terraform.

Change Summary

This update involves a version upgrade of the metrics-server Helm chart from version 3.12.2 to 3.13.0 within the main.tf file of the metrics module. This change aims to incorporate the latest features, bug fixes, and security patches provided by the new version.

Technical Details

• File Modified: IaC/modules/metrics/main.tf
• Change: The version attribute of the helm_release resource named release was updated from 3.12.2 to 3.13.0.
• Helm Chart: metrics-server from the repository https://kubernetes-sigs.github.io/metrics-server/
• Namespace: The release is deployed in the namespace defined by kubernetes_namespace_v1.metrics.metadata[0].name.

Key Learnings & Insights

• Version Management: Regularly updating Helm charts to their latest versions ensures that the system benefits from community improvements and security enhancements.
• Change Minimization: This change is isolated to a single attribute update, minimizing risk and ensuring that the broader configuration remains stable.
• Automation: Utilizing Infrastructure as Code (IaC) practices allows for seamless version upgrades with minimal manual intervention.

Impact Assessment

• Performance: The new version may include performance optimizations that could enhance the metrics collection and reporting efficiency.
• Security: Upgrading to the latest version typically incorporates the latest security patches, reducing vulnerability risks.
• Maintainability: Keeping dependencies up-to-date simplifies future upgrades and maintenance tasks.

Developer Notes

• Gotchas: Ensure that the new version of the metrics-server chart is compatible with the existing Kubernetes cluster version.
• Edge Cases: Monitor metric collection post-upgrade for any anomalies or unexpected behavior.
• Future Improvements: Consider implementing a CI/CD pipeline to automate the testing and deployment of such upgrades, reducing manual effort and potential errors.