Bump sigs.k8s.io/metrics-server to v0.8.1-0.20251210102930-049165f394c7

[RainbowMango]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

This PR bumps sigs.k8s.io/metrics-server to a pseudo version v0.8.1-0.20251210102930-049165f394c7 as there will not be a semantic version until Kubernetes v1.36 or Golang 1.26, as mentioned at kubernetes-sigs/metrics-server#1739 (comment).

Which issue(s) this PR fixes:
Fixes #
Part of #6862

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[gemini-code-assist]

Summary of Changes

Hello @RainbowMango, 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 comprehensive update of Go module dependencies across the project. Key changes include bumping sigs.k8s.io/metrics-server to a specific pseudo-version and a major version upgrade of the github.com/cenkalti/backoff library from v4 to v5, which necessitated adapting to its new API. Additionally, various components of OpenTelemetry and gRPC have been updated, bringing in new features, fixes, and improved compatibility with their latest versions.

Highlights

• Dependency Updates: The primary change involves updating numerous Go module dependencies, including sigs.k8s.io/metrics-server to a pseudo-version, github.com/onsi/gomega to v1.38.0, golang.org/x/time to v0.12.0, google.golang.org/grpc to v1.73.0, and go.opentelemetry.io modules to v1.36.0/0.58.0/0.12.0.
• Backoff Library Upgrade: The github.com/cenkalti/backoff library has been upgraded from v4 to v5, introducing significant API changes such as the removal of RetryNotify and RetryWithData functions, modifications to the ExponentialBackOff constructor, and the introduction of RetryAfterError.
• OpenTelemetry HTTP Instrumentation Enhancements: Updates to go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp include improved span naming for http.ServeMux, refined metric recording, and enhanced attribute handling, particularly concerning the OTEL_SEMCONV_STABILITY_OPT_IN environment variable.
• OpenTelemetry Core Improvements: The core OpenTelemetry library (go.opentelemetry.io/otel) received updates to its IDGenerator to utilize math/rand/v2, changes to attribute.Value handling, and modifications to propagation.Baggage to support the ValuesGetter interface for multi-value header extraction.
• gRPC Client and Server Enhancements: gRPC (google.golang.org/grpc) updates include changes to ClientConn's address resolution waiting mechanism, the addition of an AuthorityValidator interface for credentials, and adjustments to clientStream behavior for CloseSend and RPC stats reporting.

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[gemini-code-assist]

Code Review

This pull request updates sigs.k8s.io/metrics-server to a pseudo-version, which also brings in updates to several other direct and indirect dependencies as reflected in go.mod and go.sum. The rationale for using a pseudo-version is clearly stated in the description. The changes are consistent with the goal of updating dependencies and appear to be correct. I have no further comments.

[Copilot]

Pull request overview

This PR updates sigs.k8s.io/metrics-server to pseudo version v0.8.1-0.20251210102930-049165f394c7 as explained in the description - there will not be a semantic version until Kubernetes v1.34 or Golang 1.26. This is a reasonable dependency management approach for tracking upstream changes.

Summary

• Bumps metrics-server to a pseudo version commit
• Updates transitive dependencies including gRPC (1.72.1→1.73.0), OpenTelemetry (1.35.0→1.36.0), and backoff (v4→v5)
• Replaces interface{} with any in metrics-server code (cosmetic change)

Reviewed changes

Copilot reviewed 1 out of 125 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vendor/modules.txt	Updates all dependency versions including the primary metrics-server bump
vendor/sigs.k8s.io/metrics-server/pkg/api/table.go	Replaces interface{} with any type alias (no functional change)
vendor/google.golang.org/grpc/*	gRPC 1.73.0 update with new features (authority validation, name resolution tracking)
vendor/go.opentelemetry.io/otel/*	OpenTelemetry 1.36.0 update with various improvements
vendor/github.com/cenkalti/backoff/v5/*	Major version update from v4 to v5 with API changes
vendor/go.opentelemetry.io/contrib/*	Minor updates to HTTP instrumentation
vendor/github.com/onsi/gomega/*	Test framework update (1.37.0→1.38.0)

All changes appear to be standard dependency updates from vendored packages. The metrics-server change itself is minimal (cosmetic type alias update), and the transitive dependency updates follow normal semantic versioning practices.

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[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.61%. Comparing base (9ba7dc0) to head (983631b).
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7022      +/-   ##
==========================================
+ Coverage   46.60%   46.61%   +0.01%     
==========================================
  Files         699      699              
  Lines       48182    48182              
==========================================
+ Hits        22453    22461       +8     
+ Misses      24032    24026       -6     
+ Partials     1697     1695       -2     

Flag	Coverage Δ
unittests	46.61% <ø> (+0.01%)	⬆️

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[RainbowMango]

cc @whitewindmills

[whitewindmills]

/lgtm
/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: whitewindmills

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