* Add fallbacks to ARM API when getting empty node IP from Azure IMDS ([#69077](https://github.com/kubernetes/kubernetes/pull/69077), [@feiskyer](https://github.com/feiskyer))
* Verify invalid secret/configmap/projected volumes before calling setup ([#68691](https://github.com/kubernetes/kubernetes/pull/68691), [@gnufied](https://github.com/gnufied))

* Fix a regression that prevented using `subPath` volume mounts with secret, configMap, projected, and downwardAPI volumes ([#61080](https://github.com/kubernetes/kubernetes/pull/61080), [@liggitt](https://github.com/liggitt))

* Fix a regression that prevented using `subPath` volume mounts with secret, configMap, projected, and downwardAPI volumes ([#61080](https://github.com/kubernetes/kubernetes/pull/61080), [@liggitt](https://github.com/liggitt))



# v1.9.4

causes a <a href="#Run_time_panics">run-time panic</a>.
</p>

<p>
The <code>protect</code> function in the example below invokes
the function argument <code>g</code> and protects callers from
run-time panics raised by <code>g</code>.
</p>

<pre>
func protect(g func()) {
	defer func() {
		log.Println("done")  // Println executes normally even if there is a panic

* client-go: shortens refresh period for token files to 1 minute to ensure auto-rotated projected service account tokens are read frequently enough. ([#72437](https://github.com/kubernetes/kubernetes/pull/72437), [@liggitt](https://github.com/liggitt))

- Number of errors reported to the metric `storage_operation_duration_seconds_count` for emptyDir decreased significantly because previously one error was reported for each projected volume created. ([#117022](https://github.com/kubernetes/kubernetes/pull/117022), [@mpatlasov](https://github.com/mpatlasov)) [SIG Storage]

- Kube-apiserver: the `--encryption-provider-config` file is now loaded with strict deserialization, which fails if the config file contains duplicate or unknown fields. This protects against accidentally running with config files that are malformed, mis-indented, or have typos in field names, and getting unexpected behavior. When `--encryption-provider-config-automatic-reload` is used, new encryption config files that contain...

- Introducing Memory quality of service support with `cgroups v2 (Alpha)`. The `MemoryQoS` feature is now in Alpha. This allows `kubelet` running with `cgroups v2` to set memory QoS at container, pod and QoS level to protect and guarantee better memory quality. This feature can be enabled through feature gate Memory QoS. ([#102970](https://github.com/kubernetes/kubernetes/pull/102970), [@borgerli](https://github.com/borgerli))

* Support KUBE_MAX_PD_VOLS on Azure ([#41398](https://github.com/kubernetes/kubernetes/pull/41398), [@codablock](https://github.com/codablock))
* Projected volume plugin ([#37237](https://github.com/kubernetes/kubernetes/pull/37237), [@jpeeler](https://github.com/jpeeler))

- Kubeadm: add startup probes for static Pods to protect slow starting containers ([#91179](https://github.com/kubernetes/kubernetes/pull/91179), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]