* [prometheus-to-sd addon] Bump prometheus-to-sd to 0.3.1 to pick up security fixes, bug fixes and new features.
    * [event-exporter addon] Bump event-exporter to 0.2.3 to pick up security fixes.
* Fix validation for HealthzBindAddress in kube-proxy when --healthz-port is set to 0 ([#66138](https://github.com/kubernetes/kubernetes/pull/66138), [@wsong](https://github.com/wsong))

    * [prometheus-to-sd addon] Bump prometheus-to-sd to 0.3.1 to pick up security fixes, bug fixes and new features.
    * [event-exporter addon] Bump event-exporter to 0.2.3 to pick up security fixes.

* Fixes storage e2e test failures in GKE regional clusters. ([#61303](https://github.com/kubernetes/kubernetes/pull/61303), [@verult](https://github.com/verult))
* [fluentd-gcp addon] Update fluentd and event-exporter images to have the latest base image. ([#61726](https://github.com/kubernetes/kubernetes/pull/61726), [@crassirostris](https://github.com/crassirostris))

    * [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.
    * [fluentd-gcp addon] Bump prometheus-to-sd to v0.5.0 to pick up security fixes.
    * [metatada-proxy addon] Bump prometheus-to-sd v0.5.0 to pick up security fixes.

### GCP

- [stackdriver addon] Bumped prometheus-to-sd to v0.5.0 to pick up security fixes.
[fluentd-gcp addon] Bumped fluentd-gcp-scaler to v0.5.1 to pick up security fixes.
[fluentd-gcp addon] Bumped event-exporter to v0.2.4 to pick up security fixes.
[fluentd-gcp addon] Bumped prometheus-to-sd to v0.5.0 to pick up security fixes.

- The `--cidr-allocator-type` option set to `CloudAllocator` for `kube-controller-manager` will be deprecated and removed in a future release. Users are advised to transition to and explore the available options provided by their external cloud provider. ([#123011](https://github.com/kubernetes/kubernetes/pull/123011), [@dims](https://github.com/dims))

* Bump Cluster Autoscaler to 0.6.3 version ([#59192](https://github.com/kubernetes/kubernetes/pull/59192), [@mwielgus](https://github.com/mwielgus))
* Fix a broken configuration of prometheus-to-sd for fluentd and event-exporter. ([#58959](https://github.com/kubernetes/kubernetes/pull/58959), [@loburm](https://github.com/loburm))

    * [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.
    * [fluentd-gcp addon] Bump prometheus-to-sd to v0.5.0 to pick up security fixes.
    * [metatada-proxy addon] Bump prometheus-to-sd v0.5.0 to pick up security fixes.