- When proxying to an aggregated API server, kube-apiserver used the
  `EndpointSlices` of the `service` indicated by the `APIServer`, rather than
  using Endpoints.
  
  If you were using the aggregated API server feature, and you were writing out
  the endpoints for it by hand (rather than letting kube-controller-manager

    nonePlusA.callStart(FailingCall())
    assertThat(a.takeEvent()).isInstanceOf<CallStart>()
    assertThat(a.eventSequence).isEmpty()
  }

  /** Make sure we didn't mess up our special case for combining aggregates. */
  @Test
  fun moreThanTwoAggregation() {
    val a = EventRecorder(enforceOrder = false)
    val b = EventRecorder(enforceOrder = false)
    val c = EventRecorder(enforceOrder = false)

- Fix race in alpha aggregated discovery handler
  Yes, discovery document will correctly return the resources for aggregated apiservers that do not implement aggregated disovery ([#115805](https://github.com/kubernetes/kubernetes/pull/115805), [@alexzielenski](https://github.com/alexzielenski)) [SIG API Machinery]

		m.Merge(&mLocal)

		mRemote := collectRemoteMetrics(ctx, madmin.MetricsBatchJobs, collectMetricsOpts{})
		m.Merge(&mRemote)

		if m.Aggregated.BatchJobs == nil {
			return metrics
		}

		for _, mj := range m.Aggregated.BatchJobs.Jobs {
			jtype := toSnake(mj.JobType)
			var objects, objectsFailed float64
			var bucket string
			switch madmin.BatchJobType(mj.JobType) {

- OpenAPI V2 will no longer publish aggregated API server OpenAPI for group versions that do not match the APIService specified group version. ([#123570](https://github.com/kubernetes/kubernetes/pull/123570), [@Jefftree](https://github.com/Jefftree))

                        Severity.ERROR,
                        Version.BASE,
                        "packaging",
                        null,
                        "with value '" + m.getPackaging() + "' is invalid. Aggregator projects "
                                + "require 'pom' as packaging.",
                        m);
            }

            for (int i = 0, n = m.getModules().size(); i < n; i++) {

    - [Taints and Tolerations](#taints-and-tolerations)
    - [Volumes](#volumes-2)
  - [Changes to Major Components](#changes-to-major-components)
    - [API Server](#api-server)
    - [API Server Aggregator](#api-server-aggregator)
      - [Generic API Server](#generic-api-server)
    - [Client](#client)
      - [client-go](#client-go)
    - [Cloud Provider](#cloud-provider)
      - [AWS](#aws)
      - [Azure](#azure)

* Resolves an issue serving aggregated APIs backed by services that respond to requests to `/` with non-2xx HTTP responses ([#79895](https://github.com/kubernetes/kubernetes/pull/79895), [@deads2k](https://github.com/deads2k))

Work this cycle focused on graduating existing functions, and on making security functions more understandable for users.

- The sample-apiserver aggregated conformance test has updated to use the Kubernetes v1.17.0 sample apiserver ([#84735](https://github.com/kubernetes/kubernetes/pull/84735), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Architecture, CLI and Testing]