* Update cluster-proportional-autoscaler, etcd-empty-dir-cleanup, fluentd-gcp, and kube-addon-manager addons with refreshed base images containing fixes for CVE-2015-8271, CVE-2016-7543, CVE-2016-9841, CVE-2016-9843, CVE-2017-1000366, CVE-2017-2616, and CVE-2017-7507. ([#48011](https://github.com/kubernetes/kubernetes/pull/48011), [@ixdy](https://github.com/ixdy))...

  - support for the `v1alpha3` configuration file format is deprecated and will be removed in 1.14. Use `kubeadm config migrate` to migrate `v1alpha3` configuration files to `v1beta1`, which provides improvements in image repository management, addons configuration, and other areas. The documentation for `v1beta1` can be found here: https://godoc.org/k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1beta1

* ignore nonexistent ns net file error when deleting container network in case a retry ([#57697](https://github.com/kubernetes/kubernetes/pull/57697), [@dixudx](https://github.com/dixudx))

* Use old dns-ip mechanism with older cdk-addons. ([#57403](https://github.com/kubernetes/kubernetes/pull/57403), [@wwwtyro](https://github.com/wwwtyro))

    - [libvirt CoreOS](#libvirt-coreos)
    - [GCE](#gce-1)
    - [OpenStack](#openstack)
    - [Container Images](#container-images)
    - [Other Notable Changes](#other-notable-changes-16)
  - [Changes to Addons](#changes-to-addons)
    - [Dashboard](#dashboard)
    - [DNS](#dns)
    - [DNS Autoscaler](#dns-autoscaler)
    - [Cluster Autoscaler](#cluster-autoscaler-1)
    - [Cluster Load Balancing](#cluster-load-balancing)

- Expose docker registry config for addons used in Juju deployments ([#66092](https://github.com/kubernetes/kubernetes/pull/66092), [@kwmonroe](https://github.com/kwmonroe))

* Impersonate user extra ([#30881](https://github.com/kubernetes/kubernetes/pull/30881), [@deads2k](https://github.com/deads2k))
* DNS, Heapster and UI are critical addons ([#30995](https://github.com/kubernetes/kubernetes/pull/30995), [@piosz](https://github.com/piosz))
* AWS: Support HTTP->HTTP mode for ELB ([#30563](https://github.com/kubernetes/kubernetes/pull/30563), [@knarz](https://github.com/knarz))

- Add init containers log to cluster dump info. ([#88324](https://github.com/kubernetes/kubernetes/pull/88324), [@zhouya0](https://github.com/zhouya0)) [SIG CLI]
- Addons: elasticsearch discovery supports IPv6 ([#85543](https://github.com/kubernetes/kubernetes/pull/85543), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle and Instrumentation]

- `kubeadm`: Introduced a new feature gate `UpgradeAddonsBeforeControlPlane` to
  fix a kube-proxy skew policy misalignment. Its default value is `false`. Upgrade
  of the CoreDNS and kube-proxy addons will now trigger after all the control plane
  instances have been upgraded, unless the fearure gate is set to true. This feature

- The fluentd-elasticsearch addon is no longer included in the cluster directory. It is available from https://github.com/kubernetes-sigs/instrumentation-addons/tree/master/fluentd-elasticsearch. ([#107553](https://github.com/kubernetes/kubernetes/pull/107553), [@liggitt](https://github.com/liggitt))

  -  Don't break metric storage when duplicate pod metrics encountered causing hpa to fail ([#83907](https://github.com/kubernetes/kubernetes/pull/83907), [@olagacek](https://github.com/olagacek))
- addons: elasticsearch discovery supports IPv6 ([#85543](https://github.com/kubernetes/kubernetes/pull/85543), [@SataQiu](https://github.com/SataQiu))