- Updates the `requestedToCapacityRatioArguments` to add resources parameter that allows the users to specify the resource name along with weights for each resource to score nodes based on the request to capacity ratio. ([#77688](https://github.com/kubernetes/kubernetes/pull/77688), [@sudeshsh](https://github.com/sudeshsh))

  swap access, and it is a way to opt-out of swap for a single container.
  
  The formula for the swap limit for Burstable QoS pods is:
  `(<memory-request>/<node-memory-capacity>)*<node-swap-capacity>`.
  
  Support for `cgroup v1` is removed. ([#118764](https://github.com/kubernetes/kubernetes/pull/118764), [@iholder101](https://github.com/iholder101))

   ([#122285](https://github.com/kubernetes/kubernetes/pull/122285), [@sanposhiho](https://github.com/sanposhiho))
- Removed the incorrect warning event `FileSystemResizeFailed` during pod creation if it uses a readonly volume and the capacity of the volume is greater than or equal to its requested storage.
   ([#122508](https://github.com/kubernetes/kubernetes/pull/122508), [@carlory](https://github.com/carlory))

### **Storage**

*   [stable] `PersistentVolume` and `PersistentVolumeClaim` objects must now have a capacity greater than zero.
*   [stable] Mutation of `PersistentVolumeSource` after creation is no longer allowed

    * $ kubectl get pv --show-labels
    * NAME           CAPACITY   ACCESSMODES   STATUS    CLAIM            REASON    AGE       LABELS

*   Built out a good suite of tests, things should break less!
*   Added `MetaGraphDef` which makes it easier to save graphs with metadata
*   Added assignments for "Deep Learning with TensorFlow" udacity course

## Bug Fixes and Other Changes

*   Added a versioning framework for `GraphDef`s to ensure compatibility
*   Enforced Python 3 compatibility

In Kubernetes v1.15, SIG Storage continued work to [enable migration of in-tree volume plugins](https://github.com/kubernetes/enhancements/issues/625) to the Container Storage Interface (CSI). SIG Storage worked on bringing CSI to feature parity with in-tree functionality, including functionality like resizing, inline volumes, and more. SIG Storage introduces new alpha functionality in CSI that doesn't exist in the Kubernetes Storage subsystem yet, like volume cloning.

- Promoted `LocalStorageCapacityIsolation` to beta; the behaviour is enabled by default. Within the kubelet, storage capacity isolation is active if the feature gate is enabled and the specific Pod is using a user namespace. ([#126014](https://github.com/kubernetes/kubernetes/pull/126014), [@PannagaRao](https://github.com/PannagaRao)) [SIG Apps, Autoscaling, Node, Storage...

### Fixes

* 🐛 Allow exit code for dependencies with `yield` to always execute, by removing capacity limiter for them, to e.g. allow closing DB connections without deadlocks. PR [#5122](https://github.com/tiangolo/fastapi/pull/5122) by [@adriangb](https://github.com/adriangb).