### **Application Autoscaling**
#### Horizontal Pod Autoscaler
* [alpha] [HPA Status Conditions](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/#appendix-horizontal-pod-autoscaler-status-conditions).


### **Cluster Lifecycle**
#### kubeadm

evicts pods from nodes in preparation for disruptive operations like kernel
upgrades or maintenance.
     * Custom Metrics for Autoscaling (HorizontalPodAutoscaler API in the Autoscaling
API group): The Horizontal Pod Autoscaling feature now supports custom metrics
(Alpha), allowing you to specify application-level metrics and thresholds to
trigger scaling up and down the number of pods in your application.

group-horizontal-lg>.list-group-item:last-child{border-top-right-radius:.25rem;border-bottom-left-radius:0}.list-group-horizontal-lg>.list-group-item.active{margin-top:0}.list-group-horizontal-lg>.list-group-item+.list-group-item{border-top-width:1px;border-left-width:0}.list-group-horizontal-lg>.list-group-item+.list-group-item.active{margin-left:-1px;border-left-width:1px}}@media (min-width:1200px){.list-group-horizontal-xl{-ms-flex-direction:row;flex-direction:row}.list-group-horizontal-xl>.l...

.list-group-item.active {\n  margin-top: -1px;\n  border-top-width: 1px;\n}\n\n.list-group-horizontal {\n  -ms-flex-direction: row;\n  flex-direction: row;\n}\n\n.list-group-horizontal > .list-group-item:first-child {\n  border-bottom-left-radius: 0.25rem;\n  border-top-right-radius: 0;\n}\n\n.list-group-horizontal > .list-group-item:last-child {\n  border-top-right-radius: 0.25rem;\n  border-bottom-left-radius: 0;\n}\n\n.list-group-horizontal > .list-group-item.active {\n  margin-top: 0;\n}\n\n.list-group-horizontal...

### Autoscaling
* **[alpha]** The Horizontal Pod Autoscaler now supports drawing metrics through the API server aggregator.
* **[alpha]** The Horizontal Pod Autoscaler now supports scaling on multiple, custom metrics.
* Cluster Autoscaler publishes its status to kube-system/cluster-autoscaler-status ConfigMap.

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Instead, you may use the [metrics server](https://github.com/kubernetes-incubator/metrics-server). It's a simplified heapster that is able to gather and serve current metrics values. It provides the Metrics API that is used by `kubectl top`, and horizontal pod autoscaler. Note that it doesn't include some features of Heapster, such as short term metrics for graphs in kube-dashboard and dedicated push sinks, which proved hard to maintain and scale. Clusters using Heapster for transferring metrics into...

A739          ; valid                                  # 5.1  LATIN SMALL LETTER AV
A73A          ; mapped                 ; A73B          # 5.1  LATIN CAPITAL LETTER AV WITH HORIZONTAL BAR
A73B          ; valid                                  # 5.1  LATIN SMALL LETTER AV WITH HORIZONTAL BAR
A73C          ; mapped                 ; A73D          # 5.1  LATIN CAPITAL LETTER AY
A73D          ; valid                                  # 5.1  LATIN SMALL LETTER AY

*   HPA tolerance is now configurable by setting the `horizontal-pod-autoscaler-tolerance` flag. ([#52275](https://github.com/kubernetes/kubernetes/pull/52275),[ @mattjmcnaughton](https://github.com/mattjmcnaughton))

  - [stable] Enable DNS Horizontal Autoscaling with beta ConfigMap parameters support ([docs](http://kubernetes.io/docs/tasks/administer-cluster/dns-horizontal-autoscaling/))
- **Node**