- Added configurable flags to kube-apiserver for coordinated leader election. ([#132433](https://github.com/kubernetes/kubernetes/pull/132433), [@michaelasp](https://github.com/michaelasp)) [SIG API Machinery and Testing]
- Added machine readable output options (JSON & YAML) to `kubectl api-resources`. ([#132604](https://github.com/kubernetes/kubernetes/pull/132604), [@dharmit](https://github.com/dharmit)) [SIG Apps, CLI and Network]

  * Authorization sets `authorization.k8s.io/decision` and `authorization.k8s.io/reason` annotations with the authorization decision ("allow" or "forbid") and a human-readable description of why the decision was made (for example, RBAC includes the name of the role/binding/subject which allowed a request).

  logs to populate the termination message if the user does not write to the
  termination message log file. The termination message file is now properly
  readable for end users and has a maximum size (4k bytes) to prevent abuse.
  Each pod may have up to 12k bytes of termination messages before the contents
  of each will be truncated.

- Added readiness gates in extended output for pods ([#70775](https://github.com/kubernetes/kubernetes/pull/70775), [@freehan](https://github.com/freehan))
- Added `Ready` column and improve human-readable output of Deployments and StatefulSets ([#70466](https://github.com/kubernetes/kubernetes/pull/70466), [@Pingan2017](https://github.com/Pingan2017))

## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

- Audit log files are now created with a mode of 0600. Existing file permissions will not be changed. If you need the audit file to be readable by a non-root user, you can pre-create the file with the desired permissions. ([#95387](https://github.com/kubernetes/kubernetes/pull/95387), [@JAORMX](https://github.com/JAORMX)) [SIG API Machinery and Auth]

- In text format, log messages that previously used quoting to prevent multi-line output (for example, text="some \"quotation\", a\nline break") will now be printed with more readable multi-line output without the escape sequences. ([#107103](https://github.com/kubernetes/kubernetes/pull/107103), [@pohly](https://github.com/pohly))

- Generated `ResourceClaim` names are now more readable because of an additional hyphen before the random suffix (`<pod name>-<claim name>-<random suffix>`). ([#120336](https://github.com/kubernetes/kubernetes/pull/120336), [@pohly](https://github.com/pohly))

- The default value for node-monitor-grace-period has been increased...

   ([#122530](https://github.com/kubernetes/kubernetes/pull/122530), [@neolit123](https://github.com/neolit123))

uster/kubelet-config-file/) are now deprecated in favor of the file. ([#60148](https://github.com/kubernetes/kubernetes/pull/60148), [@mtaufen](https://github.com/mtaufen))

* `--show-all` (which only affected pods and only for human readable/non-API printers) is now defaulted to true and deprecated.  The flag determines whether pods in a terminal state are displayed. It will be inert in 1.11 and removed in a future release. ([#60210](https://github.com/kubernetes/kubernetes/pull/60210),...