- Added support for a new kubectl output format, `kyaml`. KYAML was a strict subset of YAML and should be accepted by any YAML processor. The formatting of KYAML was halfway between JSON and YAML.  Because it was more explicit than the default YAML style, it was less error-prone. ([#132942](https://github.com/kubernetes/kubernetes/pull/132942), [@thockin](https://github.com/thockin)) [SIG API Machinery,...

* Check for known manifests during preflight instead of only checking for non-empty manifests directory. This makes the preflight checks less heavy-handed by specifically checking for well-known files (kube-apiserver.yaml, kube-controller-manager.yaml, kube-scheduler.yaml, etcd.yaml) in /etc/kubernetes/manifests instead of simply checking for a non-empty directory. ([#57287](https://github.com/kubernetes/kubernetes/pull/57287), [@mattkelly](https://github.com/mattkelly))

- sigs.k8s.io/kustomize/api: 6ce0bf3 → v0.17.2
- sigs.k8s.io/kustomize/cmd/config: v0.11.2 → v0.14.1
- sigs.k8s.io/kustomize/kustomize/v5: 6ce0bf3 → v5.4.2
- sigs.k8s.io/kustomize/kyaml: 6ce0bf3 → v0.17.1
- sigs.k8s.io/yaml: v1.3.0 → v1.4.0

### Removed
- github.com/GoogleCloudPlatform/k8s-cloud-provider: [f118173](https://github.com/GoogleCloudPlatform/k8s-cloud-provider/tree/f118173)

* Fix aggressive VM calls for Azure VMSS ([#83102](https://github.com/kubernetes/kubernetes/pull/83102), [@feiskyer](https://github.com/feiskyer))

    * Disable timestamp adjustment in logs to optimize performance.
    * Reduce logging agent buffer chunk limit to 512k to optimize performance.
* Fix a bug on GCE that /etc/crictl.yaml is not generated when crictl is preloaded. ([#66877](https://github.com/kubernetes/kubernetes/pull/66877), [@Random-Liu](https://github.com/Random-Liu))

- go.uber.org/multierr: v1.1.0 → v1.5.0
- go.uber.org/zap: v1.10.0 → v1.16.0
- gopkg.in/yaml.v3: 9f266ea → eeeca48
- k8s.io/kube-openapi: 591a79e → 9528897
- sigs.k8s.io/kustomize/api: v0.8.5 → v0.8.8
- sigs.k8s.io/kustomize/cmd/config: v0.9.7 → v0.9.10
- sigs.k8s.io/kustomize/kustomize/v4: v4.0.5 → v4.1.2
- sigs.k8s.io/kustomize/kyaml: v0.10.15 → v0.10.17
- sigs.k8s.io/structured-merge-diff/v4: v4.1.0 → v4.1.1

### Removed

  </mime-type>

  <mime-type type="text/x-yaml">
    <_comment>YAML source code</_comment>
    <alias type="application/x-yaml" />
    <alias type="application/x-yml" />
    <alias type="application/yaml" />
    <alias type="text/vnd.yaml" />
    <alias type="text/yaml" />
    <alias type="text/x-yml" />
    <glob pattern="*.yaml"/>
    <glob pattern="*.yml"/>
    <sub-class-of type="text/plain"/>

### Other notable changes

* Fix aggressive VM calls for Azure VMSS ([#83102](https://github.com/kubernetes/kubernetes/pull/83102), [@feiskyer](https://github.com/feiskyer))

_Nothing has changed._

### Changed
- sigs.k8s.io/kustomize/api: v0.8.5 → v0.8.8
- sigs.k8s.io/kustomize/cmd/config: v0.9.7 → v0.9.10
- sigs.k8s.io/kustomize/kustomize/v4: v4.0.5 → v4.1.2
- sigs.k8s.io/kustomize/kyaml: v0.10.15 → v0.10.17

### Removed
_Nothing has changed._



# v1.21.0

[Documentation](https://docs.k8s.io)

## Downloads for v1.21.0

### Source Code

- sigs.k8s.io/json: c049b76 → 9f7c6b3
- sigs.k8s.io/kustomize/api: v0.10.1 → v0.11.4
- sigs.k8s.io/kustomize/cmd/config: v0.10.2 → v0.10.6
- sigs.k8s.io/kustomize/kustomize/v4: v4.4.1 → v4.5.4
- sigs.k8s.io/kustomize/kyaml: v0.13.0 → v0.13.6
- sigs.k8s.io/structured-merge-diff/v4: v4.1.2 → v4.2.1

### Removed
- cloud.google.com/go/firestore: v1.1.0