### Autoscaling

- Horizontal Pod Autoscaling can now scale targets up even when one or more metrics are invalid/unavailable, as long as one metric indicates a scale up should occur. ([#78503](https://github.com/kubernetes/kubernetes/pull/78503), [@gjtempleton](https://github.com/gjtempleton))


### AWS

* Update etcd 2.2 references to use 3.0.x ([#29399](https://github.com/kubernetes/kubernetes/pull/29399), [@timothysc](https://github.com/timothysc))
* HPA: ignore scale targets whose replica count is 0 ([#29212](https://github.com/kubernetes/kubernetes/pull/29212), [@sjenning](https://github.com/sjenning))

* Fix a bug that caused invalid Tolerations to be applied to Pods created by DaemonSets. ([#45349](https://github.com/kubernetes/kubernetes/pull/45349), [@gmarek](https://github.com/gmarek))
* 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))

## Changes since v1.1.1

### Major Themes

  * <strong>Significant scale improvements</strong>. Increased cluster scale by 400% to 1000 nodes with 30,000 pods per cluster.
Kubelet supports 100 pods per node with 4x reduced system overhead.
  * <strong>Simplified application deployment and management. </strong>

* Fix GPU resource validation ([#28743](https://github.com/kubernetes/kubernetes/pull/28743), [@therc](https://github.com/therc))
* Scale kube-proxy conntrack limits by cores (new default behavior) ([#28876](https://github.com/kubernetes/kubernetes/pull/28876), [@thockin](https://github.com/thockin))

- If `ComponentSLIs` feature gate is enabled, then `/metrics/slis` now becomes available on cloud-controller-manager allowing you to scrape health check metrics. ([#113340](https://github.com/kubernetes/kubernetes/pull/113340), [@Richabanke...

  - `node_cpu_usage_seconds_total`
  - `node_memory_working_set_bytes`
  - `pod_cpu_usage_seconds_total`
  - `pod_memory_working_set_bytes`
  - `resource_scrape_error`
  
  Deprecated (renamed) `scrape_error` in favor of `resource_scrape_error` ([#116897](https://github.com/kubernetes/kubernetes/pull/116897), [@Richabanker](https://github.com/Richabanker)) [SIG Architecture, Instrumentation, Node and Testing]

* Admission webhooks rules can now limit scope to only match namespaced, or only cluster-scoped resources with a `scope: "Cluster" | "Namespaced" | "*"` field. ([#74477](https://github.com/kubernetes/kubernetes/pull/74477), [@liggitt](https://github.com/liggitt))

  * kubernetes-master juju charm properly detects etcd-scale events and reconfigures appropriately. ([#44967](https://github.com/kubernetes/kubernetes/pull/44967), [@chuckbutler](https://github.com/chuckbutler))