- Easier to understand a cluster (eg: API audit logs, server-based API defaults)
- **Stateful Application Support**
  - Enhanced persistence capabilities (eg: `StorageClasses`, new volume plugins)
  - New resources and scheduler features (eg: `ScheduledJob` resource, pod/node affinity/anti-affinity)
- **Cluster Federation**
  - Global Multi-cluster HTTP(S) Ingress across GCE and GKE clusters.

* `cluster/update-storage-objects.sh` now supports updating StorageClasses in etcd to storage.k8s.io/v1. You must do this prior to upgrading to 1.8. ([#46116](https://github.com/kubernetes/kubernetes/pull/46116), [@ncdc](https://github.com/ncdc))


### Controller Manager

- Fix to allow `fsGroup` to be applied for CSI Inline Volumes ([#108662](https://github.com/kubernetes/kubernetes/pull/108662), [@dobsonj](https://github.com/dobsonj))
- Fixed CSI migration of Azure Disk in-tree StorageClasses with topology requirements in Azure regions that do not have availability zones. ([#109154](https://github.com/kubernetes/kubernetes/pull/109154), [@jsafrane](https://github.com/jsafrane))

  * Configurable [Dynamic Provisioning](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#dynamic) and [StorageClass](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#storageclasses)
* DaemonSets [can now be updated by a rolling update](https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set).

## Action Required

### Certificates API

* Support updating storageclasses in etcd to storage.k8s.io/v1. You must do this prior to upgrading to 1.8. ([#46116](https://github.com/kubernetes/kubernetes/pull/46116), [@ncdc](https://github.com/ncdc))