- *apiserver_cache_list_fetched_objects_total*: Counter of objects read from watch cache in the course of serving a LIST request, broken down by resource_prefix and index_name
  - *apiserver_cache_list_evaluated_objects_total*: Counter of objects tested in the course of serving a LIST request from watch cache, broken down by resource_prefix

- Replace scale down forbidden window with scale down stabilization window. Rather than waiting a fixed period of time between scale downs HPA now scales down to the highest recommendation it during the scale down stabilization window. ([#68122](https://github.com/kubernetes/kubernetes/pull/68122), [@krzysztof-jastrzebski](https://github.com/krzysztof-jastrzebski))...

* Bump cluster autoscaler to v0.5.4, which fixes scale down issues with pods ignoring SIGTERM. ([#45483](https://github.com/kubernetes/kubernetes/pull/45483), [@mwielgus](https://github.com/mwielgus))

- Fix: set "host is down" as corrupted mount ([#101398](https://github.com/kubernetes/kubernetes/pull/101398), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider and Storage]

* Kubeadm now includes CoreDNS version 1.6.5 ([#85108](https://github.com/kubernetes/kubernetes/pull/85108), [@rajansandeep](https://github.com/rajansandeep))
    *  - `kubernetes` plugin adds metrics to measure kubernetes control plane latency.
    *  -  the `health` plugin now includes the `lameduck` option by default, which waits for a duration before shutting down.

  
  Also, compute the backoff delay more accurately for deleted pods. ([#119466](https://github.com/kubernetes/kubernetes/pull/119466), [@mimowo](https://github.com/mimowo)) [SIG Apps]

- Fix a number of race conditions in the kubelet when pods are starting up or shutting down that might cause pods to take a long time to shut down. ([#102344](https://github.com/kubernetes/kubernetes/pull/102344), [@smarterclayton](https://github.com/smarterclayton)) [SIG Apps, Node, Storage and Testing]

* hyperkube

  * The hyperkube image has been slimmed down and no longer includes addon manifests and other various scripts. These were introduced for the now removed docker-multinode setup system. ([#44555](https://github.com/kubernetes/kubernetes/pull/44555), [@luxas](https://github.com/luxas))

## Known Issues

- There is a known issue [coredns/coredns#2629](https://github.com/coredns/coredns/issues/2629) in CoreDNS 1.3.1, wherein if the Kubernetes API shuts down while CoreDNS is connected, CoreDNS will crash. The issue is fixed in CoreDNS 1.4.0 in [coredns/coredns#2529](https://github.com/coredns/coredns/pull/2529).

- Fixed incorrect calculation for ResourceQuota with PriorityClass as its scope. ([#117677](https://github.com/kubernetes/kubernetes/pull/117677), [@Huang-Wei](https://github.com/Huang-Wei)) [SIG API Machinery]