* Docker versions 1.10.3, 1.11.2, 1.12.6 have been validated

    * Docker version 1.12.6 known issues

        * overlay2 driver not fully supported

        * live-restore not fully supported

        * no shared pid namespace support

[CRD Validation Expression Language](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/2876-crd-validation-expression-language/README.mdv) is promoted to beta, which makes it possible to declare how custom resources are validated using the [Common Expression Language (CEL)](https://github.com/google/cel-spec). Please see the [validation rules](https://kubernetes.io/docs/tasks/extend-kubernetes/custom-resources/custom-resource-definitions/#validation-rules) guide.

applied by Affirmer to the Work. Should any part of the License for any
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partial invalidity or ineffectiveness shall not invalidate the remainder
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will not (i) exercise any of his or her remaining Copyright and Related

* Rescheduler is v0.4.0, compared with v0.3.1 in v1.10 ([#65454](https://github.com/kubernetes/kubernetes/pull/65454))
* The validated docker versions are the same as for v1.10: 1.11.2 to 1.13.1 and 17.03.x (ref)
* The Go version is go1.10.2, as compared to go1.9.3 in v1.10. ([#63412](https://github.com/kubernetes/kubernetes/pull/63412))

- On compatible systems, a mounter's Unmount implementation is changed to not return an error when the specified target can be detected as not a mount point. On Linux, the behavior of detecting a mount point depends on `umount` command is validated when the mounter is created. Additionally, mount point checks will be skipped in CleanupMountPoint/CleanupMountWithForce if the mounter's Unmount having the changed behavior of not returning error when target is not a mount point. ([#109676](htt...

##  External Dependencies

- Default etcd server is unchanged at v3.2.24 since Kubernetes 1.12. ([#68318](https://github.com/kubernetes/kubernetes/pull/68318))
- The list of validated docker versions remain unchanged at 1.11.1, 1.12.1, 1.13.1, 17.03, 17.06, 17.09, 18.06 since Kubernetes 1.12. ([#68495](https://github.com/kubernetes/kubernetes/pull/68495))

  healthy.'
   ([#113375](https://github.com/kubernetes/kubernetes/pull/113375), [@atiratree](https://github.com/atiratree))
- '`metav1.LabelSelectors` specified in API objects are now validated to ensure
  they do not contain invalid label values that will error at time of use. Existing
  invalid objects can be updated, but new objects are required to contain valid
  label selectors.'

- Kubeadm: during join when a check is performed that a Node with the same name already exists in the cluster, make sure the NodeReady condition is properly validated ([#89602](https://github.com/kubernetes/kubernetes/pull/89602), [@kvaps](https://github.com/kvaps)) [SIG Cluster Lifecycle]

- The list of validated docker versions remains unchanged.
  - The current list is 1.13.1, 17.03, 17.06, 17.09, 18.06, 18.09. ([#72823](https://github.com/kubernetes/kubernetes/pull/72823), [#72831](https://github.com/kubernetes/kubernetes/pull/72831))

*   The supported etcd server version is **3.1.10**, as compared to 3.0.17 in v1.8 ([#49393](https://github.com/kubernetes/kubernetes/pull/49393),[ @hongchaodeng](https://github.com/hongchaodeng))
*   The validated docker versions are the same as for v1.8: **1.11.2 to 1.13.1 and 17.03.x**