### kubeadm
* A new label and taint is used for marking the master. The label is `node-role.kubernetes.io/master=""` and the taint has the effect `NoSchedule`. Tolerate the `node-role.kubernetes.io/master="":NoSchedule` taint to schedule a workload on the master (a networking DaemonSet for example).
* The kubelet API is now secured, only cluster admins are allowed to access it.

- [v1.7.0-rc.1](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v170-rc1)
- [v1.7.0-beta.2](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v170-beta2)
- [v1.7.0-beta.1](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v170-beta1)
- [v1.7.0-alpha.4](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v170-alpha4)

- [v1.8.0-rc.1](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v180-rc1)
- [v1.8.0-beta.1](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v180-beta1)
- [v1.8.0-alpha.3](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v180-alpha3)
- [v1.8.0-alpha.2](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md#v180-alpha2)

- [CHANGELOG-1.2.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.2.md)
- [CHANGELOG-1.3.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.3.md)
- [CHANGELOG-1.4.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.4.md)
- [CHANGELOG-1.5.md](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.5.md)

* Kubernetes cluster on GCE have crictl installed now. Users can use it to help debug their node. The documentation of crictl can be found https://github.com/kubernetes-incubator/cri-tools/blob/master/docs/crictl.md. ([#63357](https://github.com/kubernetes/k...

forwarded to kubelet static pods to control pull policy for etcd and control plane images. This option allows for precise image pull policy specification for master nodes and thus for more tight control over images. It is useful in CI environments and in environments, where the user has total control over master VM templates (thus, the master VM templates can be preloaded with the required Docker images for the control plane services). ([#58960](https://github.com/kubernetes/kubernetes/pull/58960),...

- kubeadm: all master components are now exclusively relying on the `PriorityClassName` pod spec for annotating them as cluster critical components. Since `scheduler.alpha.kubernetes.io/critical-pod` annotation is no longer supported by Kubernetes 1.14 this annotation is no longer added to master components. ([#73857](https://github.com/kubernetes/kubernetes/pull/73857), [@ereslibre](https://github.com/ereslibre))...

  - Kubeadm:
  - The label applied to control-plane nodes "node-role.kubernetes.io/master" is now deprecated and will be removed in a future release after a GA deprecation period.
  - Introduce a new label "node-role.kubernetes.io/control-plane" that will be applied in parallel to "node-role.kubernetes.io/master" until the removal of the "node-role.kubernetes.io/master" label.

- Ensured that the `node-role.kubernetes.io/master` taint is applied to the master with NoSchedule on GCE. ([#78183](https://github.com/kubernetes/kubernetes/pull/78183), [@cheftako](https://github.com/cheftako))

a critical security issue in the Kubernetes API Server, is resolved in v1.13.0 (and in [v1.10.11](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.10.md/#v11011), [v1.11.5](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.11.md/#v1115), and [v1.12.3](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.12.md/#v1123)). We recommend all clusters running previous versions update to one of these releases immediately. See issue...