Note that as a new builtin command, `kubectl debug` takes priority over any `kubectl` plugin named “debug”. You will need to rename the affected plugin.
Invocations using `kubectl alpha debug` are now deprecated and will be removed in a subsequent release. Update your scripts to use `kubectl debug` instead of `kubectl alpha debug`!

### SIG CLI introduces kubectl debug

- Added "general", "baseline", and "restricted" debugging profiles for kubectl debug. ([#114280](https://github.com/kubernetes/kubernetes/pull/114280), [@sding3](https://github.com/sding3)) [SIG CLI]
- Added "netadmin" debugging profiles for kubectl debug. ([#115712](https://github.com/kubernetes/kubernetes/pull/115712), [@wedaly](https://github.com/wedaly)) [SIG CLI]

- Kubectl: The deprecated `kubectl alpha debug` command is removed. Use `kubectl debug` instead. ([#98111](https://github.com/kubernetes/kubernetes/pull/98111), [@pandaamanda](https://github.com/pandaamanda)) [SIG CLI]

Users who create ephemeral containers using `kubectl debug` should note that kubectl version 1.22 will attempt to fall back to the old API; older versions of kubectl will not work with cluster versions of 1.22 or later. Please update kubectl to 1.22 if you wish to use `kubectl debug` with a mix of cluster versions.

## Known Issues

- Added validation of `containerLogMaxFiles` within kubelet configuration files. ([#129072](https://github.com/kubernetes/kubernetes/pull/129072), [@kannon92](https://github.com/kannon92))
- Adding resource completion in kubectl debug command ([#130033](https://github.com/kubernetes/kubernetes/pull/130033), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI]

* Exposed `/debug/flags/v` to allow dynamically set glog logging level.  For example, to change glog level to 3, send a PUT request such as `curl -X PUT http://127.0.0.1:8080/debug/flags/v -d "3"`. ([#63777](https://github.com/kubernetes/kubernetes/pull/63777), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

   ([#123413](https://github.com/kubernetes/kubernetes/pull/123413), [@seans3](https://github.com/seans3))
- A new flag called `custom` has been introduced in `kubectl debug`, allowing users to customize pre-defined profiles. ([#120346](https://github.com/kubernetes/kubernetes/pull/120346), [@ardaguclu](https://github.com/ardaguclu))

- The apiserver debug endpoint `/debug/api_priority_and_fairness/dump_requests` has been extended to dump executing requests as well as queued ones.  A column for StartTime has been added to the returned table, with the queued requests having a StartTime of "0001-01-01T00:00:00Z"....

#### Audit Logging
* [alpha] Advanced Auditing enhances the Kubernetes API [audit logging](https://kubernetes.io/docs/tasks/debug/debug-cluster/audit/#log-backend) capabilities through a customizable policy, pluggable audit backends, and richer audit data.

#### Encryption at Rest