Automatic merge from submit-queue (batch tested with PRs 41756, 36344, 34259, 40843, 41526)
add InternalDNS/ExternalDNS node address types
This PR adds internal/external DNS names to the types of NodeAddresses that can be reported by the kubelet.
will spawn follow up issues for cloud provider owners to include these when possible
```release-note
Nodes can now report two additional address types in their status: InternalDNS and ExternalDNS. The apiserver can use `--kubelet-preferred-address-types` to give priority to the type of address it uses to reach nodes.
```
Automatic merge from submit-queue (batch tested with PRs 38796, 40823, 40756, 41083, 41105)
Add more options to the RecommendedOptions struct.
Builds on https://github.com/kubernetes/kubernetes/pull/41028
Adds `AuditOptions` to the `RecommendedOptions`
@sttts @kubernetes/sig-api-machinery-pr-reviews
Automatic merge from submit-queue
Added validation for API server's 'apiserver-count' flag.
Added validation for API server's 'apiserver-count' flag. The value of this flag should be a positive number, otherwise, will cause error while reconciling endpoints in MasterCountEndpointsReconciler.
Fixed#38143
Automatic merge from submit-queue (batch tested with PRs 38212, 38792, 39641, 36390, 39005)
Generate a kubelet CA and kube-apiserver cert-pair for kubelet auth.
cc @cjcullen
Automatic merge from submit-queue
Format apiserver options
Trivial change, code formatting only: it was hard to read long lines, and my editor was really slow when scrolling through them.
Automatic merge from submit-queue
Cache Webhook Authentication responses
Add a simple LRU cache w/ 2 minute TTL to the webhook authenticator.
Kubectl is a little spammy, w/ >= 4 API requests per command. This also prevents a single unauthenticated user from being able to DOS the remote authenticator.
