Improvement to taint based eviction/toleration needed

[tengqm]

This is a...

• Feature Request
• Bug Report

This is considered a Bug Report because the inaccuracy of related documentation may lead users to incorrect operations.

Problem:
Kubernetes supports more built-in taints than documented today, say node.alpha.kubernetes.io/diskPressure, node.alpha.kubernetes.io/memoryPressure,
node.alpha.kubernetes.io/outOfDisk, node.alpha.kubernetes.io/networkUnavailable and
node.cloudprovider.kubernetes.io/uninitialized.

These taints all have impacts on taints based pod evictions.

Proposed Solution:
Fix the documentation by adding text about these taints.
Maybe we need a dedicated article for taints.

Page to Update:
https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#taints-and-tolerations-beta-feature

[tengqm]

/assign @tengqm