* Fix a bug where pod address is not removed from endpoints object while pod is in graceful termination. ([#54828](https://github.com/kubernetes/kubernetes/pull/54828), [@freehan](https://github.com/freehan))
* fix warning messages due to GetMountRefs func not implemented in windows ([#52401](https://github.com/kubernetes/kubernetes/pull/52401), [@andyzhangx](https://github.com/andyzhangx))

- JSON log output is configurable and now supports writing info messages to stdout and error messages to stderr. Info messages can be buffered in memory. The default is to write both to stdout without buffering, as before. ([#104873](https://github.com/kubernetes/kubernetes/pull/104873), [@pohly](https://github.com/pohly))

- Modified log messages that were logged with `"v":0` in JSON output although they were debug messages with a higher verbosity. ([#106978](https://github.com/kubernetes/kubernetes/pull/106978), [@p...

- Fixes the flooding warning messages about setting volume ownership for configmap/secret volumes ([#92878](https://github.com/kubernetes/kubernetes/pull/92878), [@jvanz](https://github.com/jvanz)) [SIG Instrumentation, Node and Storage]

- Migrate some log messages to structured logging in `pkg/volume/plugins.go`. ([#101510](https://github.com/kubernetes/kubernetes/pull/101510), [@huchengze](https://github.com/huchengze))

### Structured logging

SIG Instrumentation standardized the structure of log messages and references to Kubernetes objects. Structured logging makes parsing, processing, storing, querying and analyzing logs easier. New methods in the klog library enforce log message structure.

* The alpha `metadata.initializers` field, deprecated in 1.13, has been removed. ([#79504](https://github.com/kubernetes/kubernetes/pull/79504), [@yue9944882](https://github.com/yue9944882))
* Fix duplicate error messages in cli commands ([#79493](https://github.com/kubernetes/kubernetes/pull/79493), [@odinuge](https://github.com/odinuge))

- Improved `kubectl run` and `kubectl debug` error messages upon attaching failures. ([#110764](https://github.com/kubernetes/kubernetes/pull/110764), [@soltysh](https://github.com/soltysh))

* NodeController waits for informer sync before doing anything ([#34809](https://github.com/kubernetes/kubernetes/pull/34809), [@gmarek](https://github.com/gmarek))
* azure: lower log priority for skipped nic update message ([#34730](https://github.com/kubernetes/kubernetes/pull/34730), [@colemickens](https://github.com/colemickens))

- When using `kubectl logs <pod-name>` and the pod is not found, the error message now includes the namespace. Previously, the message would be "Error from server (NotFound): pods "my-pod-name" not found". Now, it reflects the namespace in the message as follows: "Error from server (NotFound): pods "my-pod-name" not found in namespace "default"".