This fixes an issue with KubeletConfiguration validation, where the
feature gates set by the new config were not taken into account.
Also fixes a validation issue with dynamic Kubelet config, where flag
precedence was not enforced prior to dynamic config validation in the
controller; this prevented rejection of dynamic configs that don't merge
well with values set via legacy flags.
Kubernetes-commit: 647e90341ca08640ab8fb3d49edb8027faf4836f
Command line flag API remains the same. This allows ComponentConfig
structures (e.g. KubeletConfiguration) to express the map structure
behind feature gates in a natural way when written as JSON or YAML.
For example:
KubeletConfiguration Before:
```
apiVersion: kubeletconfig/v1alpha1
kind: KubeletConfiguration
featureGates: "DynamicKubeletConfig=true,Accelerators=true"
```
KubeletConfiguration After:
```
apiVersion: kubeletconfig/v1alpha1
kind: KubeletConfiguration
featureGates:
DynamicKubeletConfig: true
Accelerators: true
```
Kubernetes-commit: 131b419596a3d4fce1020c3b11f78034b5880593
Tim Allclair
Lubomir I. Ivanov
Michael Taufen
Jordan Liggitt
dahefanteng
Nikhita Raghunath
Dr. Stefan Schimanski
Timothy St. Clair
Robert Rati