### Volumes
* **[stable]** StorageClass API is promoted to v1 (storage.k8s.io/v1).
* **[stable]** Default storage classes are deployed during installation on Azure, AWS, GCE, OpenStack and vSphere.
* **[stable]** Added ability to populate environment variables from a configmap or secret.

  - [stable] kubelet is able to evict pods when it observes disk pressure ([docs](http://kubernetes.io/docs/admin/out-of-resource/)) ([kubernetes/features#39](https://github.com/kubernetes/enhancements/issues/39))

   ([#123738](https://github.com/kubernetes/kubernetes/pull/123738), [@kannon92](https://github.com/kannon92))
- Promoted `AdmissionWebhookMatchConditions` to GA. The feature is now stable, and the feature gate is now locked to default.
   ([#123560](https://github.com/kubernetes/kubernetes/pull/123560), [@ivelichkovich](https://github.com/ivelichkovich))

Pod’s SELinux context, if specified
  * A stable client library release\_1\_2 is added. The library is [here](pkg/client/clientset_generated/), and detailed doc is [here](docs/devel/generating-clientset.md#released-clientsets). We will keep the interface of this go client stable.
  * New Azure File Service Volume Plugin enables mounting Microsoft Azure File

- Removed the `CronJobTimeZone` feature gate (the feature is stable and always enabled)
  - Removed the `JobMutableNodeSchedulingDirectives` feature gate (the feature is stable and always enabled)

[@fabianofranz](https://github.com/fabianofranz))

* [alpha] The Kubernetes API supports retrieving tabular output for API resources via a new mime-type application/json;as=Table;v=v1alpha1;g=meta.k8s.io. The returned object (if the server supports it) will be of type meta.k8s.io/v1alpha1 with Table, and contain column and row information related to the resource. Each row will contain information about the resource - by default it will be the object metadata, but callers can add the...

### Other notable changes

* Test x509 intermediates correctly ([#34524](https://github.com/kubernetes/kubernetes/pull/34524), [@liggitt](https://github.com/liggitt))
* Remove headers that are unnecessary for proxy target ([#34076](https://github.com/kubernetes/kubernetes/pull/34076), [@mbohlool](https://github.com/mbohlool))



# v1.3.8

* kubeadm: fix "upgrade plan" not defaulting to a "stable" version if no version argument is passed ([#75900](https://github.com/kubernetes/kubernetes/pull/75900), [@neolit123](https://github.com/neolit123))

- 'Promoted `cronjob_job_creation_skew` metric to stable to follow the cronjob v2 controller,
  the following metrics had their name updated to match metrics API guidelines:
    - `cronjob_job_creation_skew_duration_seconds` -> `job_creation_skew_duration_seconds`.' ([#113008](https://github.com/kubernetes/kubernetes/pull/113008), [@soltysh](https://github.com/soltysh))