* Eviction thresholds set to 0% or 100% will turn off eviction. ([#59681](https://github.com/kubernetes/kubernetes/pull/59681), [@mtaufen](https://github.com/mtaufen))

* CustomResourceDefinitions: OpenAPI v3 validation schemas containing `$ref`references are no longer permitted. Before upgrading, ensure CRD definitions do not include those `$ref` fields. ([#58438](https://github.com/kubernetes/kubernetes/pull/58438), [@carlory](https://github.com/carlory))

- Fixed nil pointer error in `NodeVolumeLimits` csi logging ([#115179](https://github.com/kubernetes/kubernetes/pull/115179), [@sunnylovestiramisu](https://github.com/sunnylovestiramisu))
- Fixed panic validating custom resource definition schemas that set `multipleOf` to 0 ([#114869](https://github.com/kubernetes/kubernetes/pull/114869), [@liggitt](https://github.com/liggitt))

  clearing of the `terminatedEndpoints` map. ([#135146](https://github.com/kubernetes/kubernetes/pull/135146), [@princepereira](https://github.com/princepereira)) [SIG Network and Windows]
- Fixed a bug in `ValidatingAdmissionPolicy` where schemas with `additionalProperties: true` could cause the kube-controller-manager to crash with a nil pointer exception. ([#135155](https://github.com/kubernetes/kubernetes/pull/135155), [@jpbetz](https://github.com/jpbetz))

- Added support for CEL(Common Expression Language) expressions and `additionalProperties` to be used under nested quantifiers in CRD schemas. ([#124381](https://github.com/kubernetes/kubernetes/pull/124381), [@alexzielenski](https://github.com/alexzielenski)) [SIG API Machinery]
- Added support for building Windows kube-proxy container image.

### Other notable changes

- Kube-apiserver: openapi schemas published for custom resources now reference standard ListMeta schema definitions ([#92546](https://github.com/kubernetes/kubernetes/pull/92546), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

## Changelog since v1.21.5

## Changes by Kind

### API Change

- Kube-apiserver: Fixes handling of CRD schemas containing literal null values in enums (#104989, @liggitt) [SIG API Machinery, Apps and Network]

### Feature

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://github.com/elastic/elasticsearch/tree/master/docs/changelog",
  "$ref": "#/definitions/Changelog",
  "definitions": {
    "Changelog": {
      "type": "object",
      "properties": {
        "pr": {
          "type": "integer"
        },
        "issues": {
          "type": "array",
          "items": {
            "type": "integer"
          }
        },

## Changelog since v1.22.2

## Changes by Kind

### API Change

- Kube-apiserver: Fixes handling of CRD schemas containing literal null values in enums (#104988, @liggitt) [SIG API Machinery, Apps and Network]

### Feature

작동 방식은, 각 route를 처리하는 함수의 docstring 안에 YAML 형식으로 schema 정의를 작성하고,

그로부터 OpenAPI schema를 생성합니다.

Flask, Starlette, Responder 등에서 이런 방식으로 동작합니다.

하지만 다시, Python 문자열 내부(큰 YAML)에서 micro-syntax를 다루어야 한다는 문제가 있습니다.

에디터가 이를 크게 도와주지 못합니다. 또한 파라미터나 Marshmallow schema를 수정해놓고 YAML docstring도 같이 수정하는 것을 잊어버리면, 생성된 schema는 오래된 상태가 됩니다.

/// info | 정보

APISpec은 Marshmallow와 같은 개발자들이 만들었습니다.