* Conformance tests may now include disruptive tests. If you are running tests against a live cluster, consider skipping those tests tagged as `Disruptive` to avoid non-test workloads being impacted. Be aware, skipping any conformance tests (even disruptive ones) will make the results ineligible for consideration for the CNCF Certified Kubernetes program. ([#82664](https://g...

### Failing Test

- Deflaked a preemption test that may patch Nodes incorrectly. ([#114350](https://github.com/kubernetes/kubernetes/pull/114350), [@Huang-Wei](https://github.com/Huang-Wei))

- Introduced end-to-end tests to verify component invariant metrics across the entire test suite. ([#133394](https://github.com/kubernetes/kubernetes/pull/133394), [@BenTheElder](https://github.com/BenTheElder))
- Introduced new kubelet metrics for the Ensure Secret Pulled Images KEP, including:

n,"")+"|^"+this.weekdaysShort(n,"")+"|^"+this.weekdaysMin(n,""),this._weekdaysParse[s]=new RegExp(r.replace(".",""),"i")),t&&"dddd"===a&&this._fullWeekdaysParse[s].test(e))return s;if(t&&"ddd"===a&&this._shortWeekdaysParse[s].test(e))return s;if(t&&"dd"===a&&this._minWeekdaysParse[s].test(e))return s;if(!t&&this._weekdaysParse[s].test(e))return s}},pt.weekdaysRegex=function(e){return this._weekdaysParseExact?(h(this,"_weekdaysRegex")||$e.call(this),e?this._weekdaysStrictRegex:this._weekdaysRegex...

### Failing Test

- Added mock framework support for unit tests for Windows in `kubeproxy`. ([#120105](https://github.com/kubernetes/kubernetes/pull/120105), [@princepereira](https://github.com/princepereira))

### SIG Scalability

SIG Scalability has mostly focused on stability and deflaking our tests, investing into framework for writing scalability tests (ClusterLoader v2) with a goal to migrate all tests to it by the end of 2018 and on the work towards extending definition of Kubernetes scalability by providing more/better user-friendly SLIs/SLOs.

### SIG Scheduling

### Feature

- Kubernetes is now built with Golang 1.16.9 (#105672, @cpanato) [SIG Cloud Provider, Instrumentation, Release and Testing]

### Failing Test

- Backport: e2e.test now uses the secure port to retrieve metrics data to ensure compatibility with 1.21 and 1.22 (for upgrade tests) (#104328, @pohly) [SIG API Machinery, Instrumentation, Storage and Testing]

### Bug or Regression

- Aggregate errors when putting vmss

- Replaced deprecated package `k8s.io/utils/pointer` with `k8s.io/utils/ptr` for ./test/e2e and ./test/utils. ([#132763](https://github.com/kubernetes/kubernetes/pull/132763), [@PatrickLaabs](https://github.com/PatrickLaabs)) [SIG Autoscaling and Testing]

* Make error message and service event message more clear ([#86078](https://github.com/kubernetes/kubernetes/pull/86078), [@feiskyer](https://github.com/feiskyer))
* e2e-test-framework: add e2e test namespace dump if all tests succeed but the cleanup fails. ([#85542](https://github.com/kubernetes/kubernetes/pull/85542), [@schrodit](https://github.com/schrodit))

    *   Bug fixes in validation test suites.
*   [beta] [cri-containerd](https://github.com/kubernetes-incubator/cri-containerd): CRI implementation for containerd is now v1.0.0-beta.0, [[@Random-Liu](https://github.com/Random-Liu)]
    *   This release supports Kubernetes 1.9+ and containerd v1.0.0+.
    *   Pass all Kubernetes 1.9 e2e test, node e2e test and CRI validation tests.