- Kubeadm: graduate the "kubeadm alpha certs" command to a parent command "kubeadm certs". The command "kubeadm alpha certs" is deprecated and will be removed in a future release. Please migrate. ([#94938](https://github.com/kubernetes/kubernetes/pull/94938), [@yagonobre](https://github.com/yagonobre)) [SIG Cluster...

- [alpha: kubectl apply --prune --applyset] Enabled certain custom resources (CRs) to be used as `ApplySet` parent objects. To enable this for a given CR, apply the label `applyset.kubernetes.io/is-parent-type: true` to the CustomResourceDefinition (CRD) that defines it. ([#116353](https://github.com/kubernetes/kubernetes/pull/116353), [@KnVerey](https://github.com/KnVerey))

- FibreChannel volume plugin may match the wrong device and wrong associated devicemapper parent. This may cause a disaster that pods attach wrong disks. ([#110719](https://github.com/kubernetes/kubernetes/pull/110719), [@xakdwch](https://github.com/xakdwch))

	* ip-masq-agent is now on by default for GCE ([#47794](https://github.com/kubernetes/kubernetes/pull/47794), [@dnardo](https://github.com/dnardo))

* addon-resizer flapping behavior was removed. ([#46850](https://github.com/kubernetes/kubernetes/pull/46850), [@x13n](https://github.com/x13n))
* Change default `httpGet` probe `User-Agent` to `kube-probe/<version major.minor>` if none specified, overriding the default Go `User-Agent`. ([#47729](https://github.com/kubernetes/kubernetes/pull/47729), [@paultyng](https://github.com/paultyng))

- Kubernetes 1.12 includes a large number of metadata agent improvements, including expanding the metadata agent's access to all API groups and removing metadata agent config maps in favor of command line flags. It also includes improvements to the logging agent, such as multiple fixes and adjustments.

* Add NoSchedule/NoExecute tolerations to ip-masq-agent, ensuring it to be scheduled in all nodes except master. ([#66260](https://github.com/kubernetes/kubernetes/pull/66260), [@tanshanshan](https://github.com/tanshanshan))
* Metadata Agent Improvements ([#66485](https://github.com/kubernetes/kubernetes/pull/66485), [@bmoyles0117](https://github.com/bmoyles0117))
    * Bump metadata agent version to 0.2-0.0.21-1.

### Other notable changes

* Metadata Agent Improvements ([#66485](https://github.com/kubernetes/kubernetes/pull/66485), [@bmoyles0117](https://github.com/bmoyles0117))
    * Bump metadata agent version to 0.2-0.0.21-1.
    * Expand the metadata agent's access to all API groups.
    * Remove metadata agent config maps in favor of command line flags.

  // +optional
  optional bool readOnlyRootFilesystem = 6;

  // AllowPrivilegeEscalation controls whether a process can gain more
  // privileges than its parent process. This bool directly controls if
  // the no_new_privs flag will be set on the container process.
  // AllowPrivilegeEscalation is true always when the container is:
  // 1) run as Privileged

- Gracefully delete nodes when their parent scale set went missing ([#95289](https://github.com/kubernetes/kubernetes/pull/95289), [@bpineau](https://github.com/bpineau)) [SIG Cloud Provider]