* Update version of Istio addon from 0.6.0 to 0.8.0. ([#64537](https://github.com/kubernetes/kubernetes/pull/64537), [@ostromart](https://github.com/ostromart))
    * See https://istio.io/news/2018/announcing-0.8/  for full Isto release notes.

    * kubeadm upgrade can now rollback and restore etcd after an upgrade failure
* Update version of Istio addon from 0.5.1 to 0.6.0. ([#61911](https://github.com/kubernetes/kubernetes/pull/61911), [@ostromart](https://github.com/ostromart))
    * See https://istio.io/news/releases/0.x/announcing-0.6/ for full Isto release notes.

  // items if unspecified, each key-value pair in the Data field of the referenced
  // ConfigMap will be projected into the volume as a file whose name is the
  // key and content is the value. If specified, the listed keys will be
  // projected into the specified paths, and unlisted keys will not be
  // present. If a key is specified which is not present in the ConfigMap,

* **[stable]** Add support to use NFSv3, NFSv4, and GlusterFS on GCE/GKE GCI image based clusters.
* **[beta]** Added support for mount options in persistent volumes.
* **[alpha]** All in one volume proposal - a new volume driver capable of projecting secrets, configmaps, and downward API items into the same directory.

## Deprecations

* scheduler: makes pod less racing so as to be put back into activeQ properly ([#73078](https://github.com/kubernetes/kubernetes/pull/73078), [@Huang-Wei](https://github.com/Huang-Wei))
* jsonpath expressions containing `[start:end:step]` slice are now evaluated correctly ([#73149](https://github.com/kubernetes/kubernetes/pull/73149), [@liggitt](https://github.com/liggitt))

*   Pod preemption has been improved.
    *   Now takes PodDisruptionBudget into account. ([#56178](https://github.com/kubernetes/kubernetes/pull/56178),[ @bsalamat](https://github.com/bsalamat))

controller back-off logic is now decoupled from workqueue. In case of parallelism > 1, if there are multiple new failures in a reconciliation cycle, all the failures are taken into account to compute the back-off. Previously, the back-off kicked in for all types of failures; with this change, only pod failures are taken into account. If the back-off limits exceeds, the job is marked as failed immediately; before this change, the job is marked as failed in the next back-off. ([#114768](https://git...

- Istio addon is unchanged from v1.11, at  0.8.0. See [full Istio release notes](https://istio.io/news/releases/0.x/announcing-0.6/) ([#64537](https://github.com/kubernetes/kubernetes/pull/64537))

- the IP allocator in v1.17.0 can return errors such as `the cluster IP <ip> for service <service-name> is not within the service CIDR <cidr>; please recreate` in the logs of...

  - The schema for the alpha `CSINodeInfo` CRD has been split into `spec` and `status` fields, and new fields `status.available` and `status.volumePluginMechanism` added. Clusters using the previous alpha schema must delete and recreate the CRD using the new schema. ([#70515](https://github.com/kubernetes/kubernetes/pull/70515),...