and `sync_partial_proxy_rules_duration_seconds` (in addition to the existing
  `sync_proxy_rules_duration_seconds`), to give better information about how long
  each sync type is taking, rather than only giving a weighted average of the two
  sync types together. ([#117787](https://github.com/kubernetes/kubernetes/pull/117787), [@danwinship](https://github.com/danwinship)) [SIG Network]

  - the NormalizeScore plugin set is removed from scheduler framework config API. Use ScorePlugin only. ([#80930](https://github.com/kubernetes/kubernetes/pull/80930), [@liu-cong](https://github.com/liu-cong))

### Workloads that saturate nodes with pods may see pods that fail due to node admission

- Fixes an issue with the max-in-flight API server filter where the filter could take a long time to process an incoming request if it had been a long time since the last request. ([#96282](https://github.com/kubernetes/kubernetes/pull/96282), [@staebler](https://github.com/staebler)) [SIG API Machinery]

- New "field_validation_request_duration_seconds" metric, measures how long requests take, indicating the value of the fieldValidation query parameter and whether or not server-side field validation is enabled on the apiserver ([#109120](https://github.com/kubernetes/kubernetes/pull/109120), [@kevindelgado](https://github.com/kevindelgado))...

- Kubelet: added log for volume metric collection taking too long ([#107490](https://github.com/kubernetes/kubernetes/pull/107490), [@pacoxu](https://github.com/pacoxu))

    * Kubernetes:     v1.4.5
    * Docker:         v1.11.2
    * Changelog (vs 55-8872-18-0)
            * Updated kubernetes to v1.4.5
            * Fixed a bug in e2fsprogs that caused mke2fs to take a very long time. Upstream fix: http://git.kernel.org/cgit/fs/ext2/e2fsprogs.git/commit/?h=next&id=d33e690fe7a6cbeb51349d9f2c7fb16a6ebec9c2

- Fixed a bug where startupProbe stopped working after a container's first restart ([#101093](https://github.com/kubernetes/kubernetes/pull/101093), [@wzshiming](https://github.com/wzshiming)) [SIG Node]
- Fixed port-forward memory leak for long-running and heavily used connections. ([#99839](https://github.com/kubernetes/kubernetes/pull/99839), [@saschagrunert](https://github.com/saschagrunert)) [SIG API Machinery and Node]

#### CustomResourceDefinition OpenAPI Publishing

OpenAPI specs for native types have long been served at /openapi/v2, and they are consumed by a number of components, notably kubectl client-side validation, kubectl explain and OpenAPI based client generators.

With Kubernetes 1.15 as beta, OpenAPI schemas are also published for CRDs, as long as their schemas are structural.

* Pipe get options to storage ([#37693](https://github.com/kubernetes/kubernetes/pull/37693), [@wojtek-t](https://github.com/wojtek-t))