* kubeadm: fixed nil pointer dereference caused by a bug in url parsing ([#74454](https://github.com/kubernetes/kubernetes/pull/74454), [@bart0sh](https://github.com/bart0sh))

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))
* fix Azure Container Registry anonymous repo image pull error ([#74715](https://github.com/kubernetes/kubernetes/pull/74715), [@andyzhangx](https://github.com/andyzhangx))

* Fix AWS device allocator to only use valid device names ([#41455](https://github.com/kubernetes/kubernetes/pull/41455), [@gnufied](https://github.com/gnufied))
* Trust region if found from AWS metadata ([#38880](https://github.com/kubernetes/kubernetes/pull/38880), [@justinsb](https://github.com/justinsb))

  integrity sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==

browserslist@^4.14.5:
  version "4.20.4"
  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.20.4.tgz#98096c9042af689ee1e0271333dbc564b8ce4477"

- Added port configuration to CRD Conversion webhook configuration service reference.
- Added port configuration to kube-aggregator service reference. ([#74855](https://github.com/kubernetes/kubernetes/pull/74855), [@mbohlool](https://github.com/mbohlool))
- Implemented deduplication logic for v1beta1.Event API ([#65782](https://github.com/kubernetes/kubernetes/pull/65782), [@yastij](https://github.com/yastij))

* Backporting TPR fix to 1.4 ([#42380](https://github.com/kubernetes/kubernetes/pull/42380), [@foxish](https://github.com/foxish))
* Fix AWS device allocator to only use valid device names ([#41455](https://github.com/kubernetes/kubernetes/pull/41455), [@gnufied](https://github.com/gnufied))

## Changelog since v1.5.3

### Other notable changes

* Fix AWS device allocator to only use valid device names ([#41455](https://github.com/kubernetes/kubernetes/pull/41455), [@gnufied](https://github.com/gnufied))

    assertThat(stats.loadExceptionCount()).isEqualTo(0);
    assertThat(stats.hitCount()).isEqualTo(3);

    // duplicate keys are ignored, and don't impact stats
    assertThat(cache.getAll(asList(4, 5))).containsExactly(4, 4, 5, 5);
    stats = cache.stats();
    assertThat(stats.missCount()).isEqualTo(5);
    assertThat(stats.loadSuccessCount()).isEqualTo(5);
    assertThat(stats.loadExceptionCount()).isEqualTo(0);

* mark container-port flag as deprecated ([#25072](https://github.com/kubernetes/kubernetes/pull/25072), [@AdoHe](https://github.com/AdoHe))
* Provide flags to use etcd3 backed storage ([#24455](https://github.com/kubernetes/kubernetes/pull/24455), [@hongchaodeng](https://github.com/hongchaodeng))

### Other notable changes

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))