any                comparable                     // satisfied: any is comparable and implements the basic interface any
struct{f any}      comparable                     // satisfied: struct{f any} is comparable and implements the basic interface any
any                interface{ comparable; m() }   // not satisfied: any does not implement the basic interface interface{ m() }

  - the `--make-symlinks` flag, deprecated in v1.14, has been removed. ([#80017](https://github.com/kubernetes/kubernetes/pull/80017), [@Pothulapati](https://github.com/Pothulapati))

- kube-apiserver

  - the `--basic-auth-file` flag and authentication mode is deprecated and will be removed in a future release. It is not recommended for production environments. ([#81152](https://github.com/kubernetes/kubernetes/pull/81152), [@tedyu](https://github.com/tedyu))

- Fixed bug in error messaging for basic-auth and ssh secret validations. ([#106179](https://github.com/kubernetes/kubernetes/pull/106179), [@vivek-koppuru](https://github.com/vivek-koppuru))

* AWS EBS volumes can be now used as ReadOnly in pods. ([#64403](https://github.com/kubernetes/kubernetes/pull/64403), [@jsafrane](https://github.com/jsafrane))
* Basic plumbing for volume topology aware dynamic provisionin has been implemented. ([#63232](https://github.com/kubernetes/kubernetes/pull/63232), [@lichuqiang](https://github.com/lichuqiang))

#### Continuous Improvement
- Project sustainability is not just about features. Many SIGs have been working on  improving test coverage, ensuring the basics stay reliable, and stability of the core feature set and working on maturing existing features and cleaning up the backlog.

#### Extensibility

* Fix the bug where StartedAt time is not reported for exited containers. ([#45977](https://github.com/kubernetes/kubernetes/pull/45977), [@yujuhong](https://github.com/yujuhong))
* Enable basic auth username rotation for GCI ([#44590](https://github.com/kubernetes/kubernetes/pull/44590), [@ihmccreery](https://github.com/ihmccreery))

PR](https://github.com/kubernetes/community/pull/742)) ([kubernetes/features#290](https://github.com/kubernetes/enhancements/issues/290))

* [alpha] Integration with [containerd] (https://github.com/containerd/containerd) , which supports basic pod lifecycle and image management. ([docs](https://github.com/kubernetes-incubator/cri-containerd/blob/master/README.md) and [release notes](https://github.com/kubernetes-incubator/cri-containerd/releases/tag/v0.1.0)) ([kubernetes/features#286](h...

Additionally, these Kubernetes snapshot primitives act as basic building blocks that unlock the ability to develop advanced, enterprise-grade, storage administration features for Kubernetes: including application or cluster level backup solutions.

### Other (Cleanup or Flake)

- Added basic Denial Of Service prevention for the the node-local kubelet `podresource` API ([#116459](https://github.com/kubernetes/kubernetes/pull/116459), [@ffromani](https://github.com/ffromani)) [SIG Node and Testing]

        * Switch to basing our image of Elasticsearch in fluentd-elasticsearch addon off the official one
        * Switch to the official image of Kibana in fluentd-elasticsearch addon
        * Use StatefulSet for Elasticsearch instead of ReplicationController, with persistent volume claims
        * Require authenticating towards Elasticsearch, as Elasticsearch 5.5 by default requires basic authentication