Sourced from sigs.k8s.io/controller-runtime's releases.

v0.21.0

Highlights

• Bump to Kubernetes v1.33 libraries
• Improvements for priority queue (#2374)
• envtest now has an option to download envtest binaries (can be used to replace setup-envtest depending on use case)
• Metric improvements: native histograms, all Go runtime metrics are enabled now
• Various bug fixes
• New reviewers: @​troy0820, @​JoelSpeed!!

:warning: Breaking Changes

• Bump to k8s.io/* v0.33.0 and Go 1.24 (#3104 #3142 #3161 #3204 #3215)
• config: Stop enabling client-side ratelimiter by default (#3119)
  • Previous behavior can be preserved by setting QPS 20 and Burst 30 on the rest.Config
• controller: NewUnmanaged/NewTypedUnmanaged: Stop requiring a manager (#3141)
• reconcile: Deprecate Result.Requeue (#3107)

:sparkles: New Features

• controller: priority queue:
  • Add debug logging for the state of the priority queue (#3075)
  • Add priority label to queue depth metric (#3156)
  • Leverage IsInInitialList (#3162)
  • Remove redundant WithLowPriorityWhenUnchanged in builder (#3168)
  • Retain the priority after Reconcile (#3167)
  • Set priority automatically in handlers (#3111 #3152 #3160 #3174)
• envtest: Add Environment.KubeConfig field (#2278)
• envtest: Add option to download envtest binaries (#3135 #3137)
• events: Add IsInInitialList to TypedCreateEvent (#3162)
• log/zap: Enable panic log level (#3186)
• logging: Adopt WarningHandlerWithContext (#3176)
• logging: Improve logging by adopting contextual logging (#3149)
• metrics: Adopt native histograms (#3165)
• metrics: Expose all Go runtime metrics (#3070)

:bug: Bug Fixes

• apiutil: restmapper: Respect preferred version (#3151)
• builder: webhook: Fix custom path for webhook conflicts (#3102)
• cache: Clone maps to prevent data races when concurrently creating caches using the same options (#3078)
• cache: Stop accumulating lists in multi-namespace cache implementation (#3195)
• cache: List out of global cache when present and necessary (#3126)
• client: Return error if pagination is used with the cached client (#3134)
• controller: Support WaitForSync in TypedSyncingSource (#3084)
• controller: priority queue: Fix behavior of rate limit option in priorityqueue.AddWithOpts (#3103)
• controller: priority queue: Yet another queue_depth metric fix (#3085)
• controllerutil: CreateOrUpdate: Avoid panic when the MutateFn is nil (#2828)
• envtest: Fix nil pointer exception in Stop() (#3153)
• fake client: Fix data races when writing to the scheme (#3143)

... (truncated)

• 71f7db5 Merge pull request #3225 from troy0820/troy0820/prepare-for-0.21-release
• 52d8779 update README with go version
• ab37f74 Merge pull request #3223 from troy0820/troy0820/return-warnings-on-webhooks
• 250a88f return warnings on webhooks
• 85ee7a9 Merge pull request #3217 from kubernetes-sigs/dependabot/github_actions/all-g...
• 81f1fae :seedling: Bump the all-github-actions group across 1 directory with 3 updates
• d9a2274 Merge pull request #3187 from dongjiang1989/update-golangci-lint-v2
• 9c38211 update golangci-lint to v2
• 9b5f6a7 Merge pull request #3208 from troy0820/troy0820/api-machinery-marshal
• b3278df use sigs.k8s.io/json to unmarshal in fakeclient
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