Fix missing volumeattachments permission for autoscaler clusterrole

[pat-s]

fix #1694

ref: kubernetes/autoscaler#7904

[gemini-code-assist]

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Summary of Changes

Hello team, gemini-code-assist here to provide a summary of this pull request. This PR, authored by pat-s, addresses issue #1694 by adding a missing permission to the Kubernetes ClusterRole used by the autoscaler. Specifically, it grants the autoscaler the ability to watch, list, and get volumeattachments resources. This change aligns with updates in the upstream Kubernetes autoscaler project (referenced via kubernetes/autoscaler/pull/7904) and is necessary for the autoscaler to function correctly, likely when interacting with persistent storage components.

Highlights

• Fix Missing Permission: Adds the volumeattachments resource to the autoscaler's ClusterRole definition.
• Kubernetes Role Update: Modifies the ClusterRole template (templates/autoscaler.yaml.tpl) to include the necessary permission for volumeattachments.

Changelog

• templates/autoscaler.yaml.tpl
  • Added volumeattachments to the list of resources in the ClusterRole definition (inserted at line 43 in the updated file) to grant watch, list, and get permissions.

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Role needs one more right,
Volume attach, watch, and list,
Autoscale works now.

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[gemini-code-assist]

Code Review

This pull request addresses a missing permission for the cluster autoscaler by adding volumeattachments to its ClusterRole with watch, list, and get verbs. This change aligns with upstream Kubernetes autoscaler requirements (as referenced in kubernetes/autoscaler/pull/7904) for scenarios involving CSI migration or CSI volume limits, ensuring the autoscaler can accurately assess node resources.

The change is clear, concise, and correctly implemented in the templates/autoscaler.yaml.tpl file. Well done for identifying and fixing this!

Summary of Findings

• Explanatory Comment (Low Severity): Consider adding a brief YAML comment next to the volumeattachments permission explaining why it's needed, potentially referencing the upstream issue or PR (e.g., # Required for CSI volume limits and CSIMigration features). This would enhance long-term maintainability. (Not added as a direct review comment due to severity settings).

Merge Readiness

The pull request is well-defined and the change is correct and necessary for the proper functioning of the cluster autoscaler under certain configurations. It directly addresses the issue described. I see no critical or high-severity issues. Based on this review, the PR appears ready for merging. As always, ensure any internal testing or further review processes are completed. I am not authorized to approve pull requests.

[mysticaltech]

Awesome, thanks @pat-s