- `kube-apiserver` updated:

debating the need for a debug utility for quite some time already. With the development of [ephemeral containers](https://kubernetes.io/docs/concepts/workloads/pods/ephemeral-containers/), it became more obvious how we can support developers with tooling built on top of `kubectl exec`. The addition of the `kubectl debug` [command](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cli/1441-kubectl-debug/README.md) (it is alpha but your feedback is more than welcome), allows developers...

### DaemonSet
* **[beta]** Introduce the rolling update feature for DaemonSet. See [Performing a Rolling Update on a DaemonSet](https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/).

### Deployment

more robust has been a major focus for this cycle for SIG Cluster Lifecycle (see the May 6, 2019 [Community Update](https://docs.google.com/presentation/d/1QUOsQxfEfHlMq4lPjlK2ewQHsr9peEKymDw5_XwZm8Q/edit?usp=sharing)). Bug fixes across bare metal tooling and production-ready user stories, such as the high availability use cases have been given priority for 1.15.

kubeadm, the cluster lifecycle building block, continues to receive features and stability work required for bootstrapping production...

- Revised the logic for DaemonSet rolling update to exclude nodes if scheduling constraints are not met.

The cri-tools project, which aims to provide consistent tooling for operators to debug and introspect their nodes in production independent of their chosen container runtime, graduated to GA.

* The `batch/v2alpha1.ScheduledJob` was removed. Migrate to `batch/v1beta.CronJob` to continue managing time based jobs.

* Fixes an issue with APIService auto-registration affecting rolling HA apiserver restarts that add or remove API groups being served. ([#51921](https://github.com/kubernetes/kubernetes/pull/51921), [@liggitt](https://github.com/liggitt))

  For more information, see [#56348](https://github.com/kubernetes/kubernetes/issues/56348).

*   API server times out after performing a rolling update of the etcd cluster. This issue will be fixed in a future release.

  For more information, see [#47131](https://github.com/kubernetes/kubernetes/issues/47131)

- CoreDNS adds readinessProbe which prevents loadbalancing to unready pods, and also allows rolling updates to work as expected. ([#74137](https://github.com/kubernetes/kubernetes/pull/74137), [@rajansandeep](https://github.com/rajansandeep))