- [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-13)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-4)
    - [Feature](#feature-12)

  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-13)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-3)
    - [Feature](#feature-11)

    *   Change `node.alpha.kubernetes.io/notReady` to `node.kubernetes.io/not-ready`
    *   Change `node.alpha.kubernetes.io/unreachable` to  `node.kubernetes.io/unreachable`

Flexvolume plugin directory for COS images on GCE has changed to `/home/kubernetes/flexvolume`, rather than `/etc/srv/kubernetes/kubelet-plugins/volume/exec`. Existing Flexvolume installations in clusters using COS images must be moved to the new directory, and installation processes must be updated with the new path. ([#58171](https://github.com/kubernetes/kubernetes/pull/58171), [@verult](https://github.com/verult))

* Default values differ between the Kubelet's componentconfig (config file)...

* Affinity in annotations alpha feature is no longer supported in 1.8. Anyone upgrading from 1.7 with AffinityInAnnotation feature enabled must ensure pods (specifically with pod anti-affinity PreferredDuringSchedulingIgnoredDuringExecution) with empty TopologyKey fields must be removed before upgrading to 1.8. ([#49976](https://github.com/kubernetes/kubernetes/pull/49976), [@aveshagarwal](https://github.com/aveshagarwal))

    - [Node binaries](#node-binaries-12)
  - [Changelog since v1.18.5](#changelog-since-v1185)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-13)
    - [API Change](#api-change-2)
    - [Bug or Regression](#bug-or-regression-12)
  - [Dependencies](#dependencies-14)

    - [Container Images](#container-images-9)
  - [Changelog since v1.27.0](#changelog-since-v1270)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-9)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-2)
    - [Feature](#feature-8)

    - [Node binaries](#node-binaries-7)
  - [Changelog since v1.17.8](#changelog-since-v1178)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Changes by Kind](#changes-by-kind-8)
    - [Bug or Regression](#bug-or-regression-7)
  - [Dependencies](#dependencies-8)
    - [Added](#added-8)

- If Openstack LoadBalancer is not defined in cloud config, the loadbalancer will no longer beis not initialized. any more in openstack. All setups must have some setting under that section for the OpenStack provider. ([#65781](https://github.com/kubernetes/kubernetes/pull/65781), [@zetaab](https://github.com/zetaab))

## Deprecations and removals

## Urgent Upgrade Notes

### (No, really, you MUST do this before you upgrade)

Before upgrading to Kubernetes 1.13, you must keep the following in mind:

- kube-apiserver