* [stackdriver addon] Bump prometheus-to-sd to v0.5.0 to pick up security fixes. ([#75362](https://github.com/kubernetes/kubernetes/pull/75362), [@serathius](https://github.com/serathius))
    * [fluentd-gcp addon] Bump fluentd-gcp-scaler to v0.5.1 to pick up security fixes.
    * [fluentd-gcp addon] Bump event-exporter to v0.2.4 to pick up security fixes.

* Fix a bug where soft eviction would not trigger when the threshold was crossed ([#52046](https://github.com/kubernetes/kubernetes/pull/52046), [@dashpole](https://github.com/dashpole))
* Addon manager supports HA masters. ([#55782](https://github.com/kubernetes/kubernetes/pull/55782), [@x13n](https://github.com/x13n))

- kubeadm: `kubeadm upgrade node` now supports `addon` and `post-upgrade` phases. Users can use `kubeadm upgrade node phase addon` to execute the addon upgrade, or use `kubeadm upgrade node --skip-phases addon` to skip the addon upgrade. If you were previously skipping an addon subphase on `kubeadm init` you should now skip the same addon when calling `kubeadm upgrade apply` and `kubeadm upgrade node`. Currently, the `post-upgrade` phase is...

  - ip-mask-agent addon starts to use the label `node.kubernetes.io/masq-agent-ds-ready` instead of `beta.kubernetes.io/masq-agent-ds-ready` as its node selector.
  - kube-proxy addon starts to use the label `node.kubernetes.io/kube-proxy-ds-ready` instead of `beta.kubernetes.io/kube-proxy-ds-ready` as its node selector.

### Other notable changes

* Trusty: Update heapster manifest handling code ([#23434](https://github.com/kubernetes/kubernetes/pull/23434), [@andyzheng0831](https://github.com/andyzheng0831))
* Support addon Deployments, make heapster a deployment with a nanny. ([#22893](https://github.com/kubernetes/kubernetes/pull/22893), [@Q-Lee](https://github.com/Q-Lee))

   */
  private static <E extends @Nullable Object> boolean addAllImpl(
      Multiset<E> self, AbstractMapBasedMultiset<? extends E> elements) {
    if (elements.isEmpty()) {
      return false;
    }
    elements.addTo(self);
    return true;
  }

  /** An implementation of {@link Multiset#removeAll}. */
  static boolean removeAllImpl(Multiset<?> self, Collection<?> elementsToRemove) {
    Collection<?> collection =

* Unmount operation should not fail if volume is already unmounted ([#38547](https://github.com/kubernetes/kubernetes/pull/38547), [@rkouj](https://github.com/rkouj))
* Updates base image used for `kube-addon-manager` to latest `python:2.7-slim` and embedded `kubectl` to `v1.3.10`. No functionality changes expected. ([#42842](https://github.com/kubernetes/kubernetes/pull/42842), [@ixdy](https://github.com/ixdy))

* 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](...

* Add generic NoSchedule toleration to fluentd in gcp config. ([#48182](https://github.com/kubernetes/kubernetes/pull/48182), [@gmarek](https://github.com/gmarek))
* Update cluster-proportional-autoscaler, fluentd-gcp, and kube-addon-manager, and kube-dns addons with refreshed base images containing fixes for CVE-2016-9841, CVE-2016-9843, CVE-2017-2616, and CVE-2017-6512. ([#47454](https://github.com/kubernetes/kubernetes/pull/47454), [@ixdy](https://github.com/ixdy))

- Update crictl to v1.16.1. ([#82856](https://github.com/kubernetes/kubernetes/pull/82856), [@Random-Liu](https://github.com/Random-Liu))
- Bump addon-resizer to 1.8.7 to fix issues with using deprecated extensions APIs ([#85864](https://github.com/kubernetes/kubernetes/pull/85864), [@liggitt](https://github.com/liggitt))