Automatic merge from submit-queue (batch tested with PRs 50489, 51070, 51011, 51022, 51141)
Fix the method name of BuiltInAuthenticationOptions.WithAnyonymous
change the BuiltInAuthenticationOptions.WithAnyonymous to
WithAnonymous would be better.
**What this PR does / why we need it**:
The BuiltInAuthenticationOptions.WithAnyonymous method name should be a meaningful name of WithAnonymous
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
This change renames the `--experimental-bootstrap-token-auth` flag to `--enable-bootstrap-token-auth`. The old flag is accepted but generates a warning.
In 1.9, we will drop support for `--experimental-bootstrap-token-auth` entirely.
Add the following flags to control the prefixing of usernames and
groups authenticated using OpenID Connect tokens.
--oidc-username-prefix
--oidc-groups-prefix
e2e and integration tests have been switched over to the tokenfile
authenticator instead.
```release-note
The --insecure-allow-any-token flag has been removed from kube-apiserver. Users of the flag should use impersonation headers instead for debugging.
```
Automatic merge from submit-queue
Delete "hard-coded" default value in flags usage.
**What this PR does / why we need it**:
Some flags of kubernetes components have "hard-coded" default values in their usage info. In fact, [pflag pkg](https://github.com/kubernetes/kubernetes/blob/master/vendor/github.com/spf13/pflag/flag.go#L602-L608) has already added a string `(default value)` automatically in the usage info if the flag is initialized. Then we don't need to hard-code the default value in usage info. After this PR, if we want to update the default value of a flag, we only need to update the flag where it is initialized. `pflag` will update the usage info for us. This will avoid inconsistency.
For example:
Before
```
kubelet -h
...
--node-status-update-frequency duration Specifies how often kubelet posts node status to master. Note: be cautious when changing the constant, it must work with nodeMonitorGracePeriod in nodecontroller. Default: 10s (default 10s)
...
```
After
```
kubelet -h
...
--node-status-update-frequency duration Specifies how often kubelet posts node status to master. Note: be cautious when changing the constant, it must work with nodeMonitorGracePeriod in nodecontroller. (default 10s)
...
```
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
This PR doesn't delete some "hard-coded" default values because they are not explicitly initialized. We still need to hard-code them to give users friendly info.
```
--allow-privileged If true, allow containers to request privileged mode. [default=false]
```
**Release note**:
```release-note
None
```
```release-note
kube-apiserver: --service-account-lookup now defaults to true. This enables service account tokens to be revoked by deleting the Secret object containing the token.
```
