If a REST API reaches the end of that nine-month countdown, then the next Kubernetes release will deprecate that API version. More information can be found on [the Kubernetes Blog](https://kubernetes.io/blog/2020/08/21/moving-forward-from-beta/).

### Expanded CLI support for debugging workloads and nodes

- Move volume expansion feature to GA ([#108929](https://github.com/kubernetes/kubernetes/pull/108929), [@gnufied](https://github.com/gnufied))
- Moving MixedProtocolLBService from alpha to beta ([#109213](https://github.com/kubernetes/kubernetes/pull/109213), [@bridgetkromhout](https://github.com/bridgetkromhout))

- New repository created for [Windows Operational Readiness](https://github.com/kubernetes-sigs/windows-operational-readiness)

### Moved container registry service from k8s.gcr.io to registry.k8s.io

- Prevented watch cache starvation by moving its watch to separate RPC. Added a `SeparateCacheWatchRPC` feature flag to disable this behavior. ([#123532](https://github.com/kubernetes/kubernetes/pull/123532), [@serathius](https://github.com/serathius))

Kubernetes 1.15 consists of **25 enhancements**: 2 moving to stable, 13 in beta, and 10 in alpha. The main themes of this release are:

#### Continuous Improvement

* Clean up items from moving local cluster setup guides ([#30035](https://github.com/kubernetes/kubernetes/pull/30035), [@pwittrock](https://github.com/pwittrock))

     1. Be authorized to make the create or update API request
     2. Be allowed to bind the referenced role, either by already having all of the permissions contained in the referenced role, or by having the "bind" permission on the referenced role.

- Fixes an issue calculating total CPU usage reported for Windows nodes ([#122999](https://github.com/kubernetes/kubernetes/pull/122999), [@marosset](https://github.com/marosset)) [SIG Node and Windows]
- Prevent watch cache starvation by moving its watch to separate RPC and add a SeparateCacheWatchRPC feature flag to disable this behavior ([#123693](https://github.com/kubernetes/kubernetes/pull/123693), [@mengqiy](https://github.com/mengqiy)) [SIG API Machinery]

- Moving MixedProtocolLBService from beta to GA ([#112895](https://github.com/kubernetes/kubernetes/pull/112895), [@janosi](https://github.com/janosi)) [SIG Apps, Network and Testing]

* Pre-existing log files are now opened with O_APPEND, instead of O_TRUNC. This helps prevent losing logs when components crash-loop, and also enables external log rotation utilities to truncate log files in-place without components extending log files to their pre-truncation sizes on subsequent writes. ([#74837](https://github.com/kubernetes/ku...