- fluentd-gcp-scaler has been updated to v0.5.0 ([#68837](https://github.com/kubernetes/kubernetes/pull/68837))
- Fluentd in fluentd-elasticsearch is unchanged at v1.2.4 since Kubernetes 1.11 ([#67434](https://github.com/kubernetes/kubernetes/pull/67434))
- fluentd-elasticsearch has been updated to v2.2.1 ([#68012](https://github.com/kubernetes/kubernetes/pull/68012))

- Fluentd: isolate logging resources in separate namespace `logging` ([#68004](https://github.com/kubernetes/kubernetes/pull/68004), [@saravanan30erd](https://github.com/saravanan30erd))

- 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))

- Add fish shell completion to kubectl. ([#92989](https://github.com/kubernetes/kubernetes/pull/92989), [@WLun001](https://github.com/WLun001))
- Add mechanism to load simple sniffer class into fluentd-elasticsearch image ([#92853](https://github.com/kubernetes/kubernetes/pull/92853), [@cosmo0920](https://github.com/cosmo0920))
- Add support for Portworx plugin to csi-translation-lib. Alpha release
  

* [fluentd-gcp addon] Fixes fluentd deployment on GCP when custom resources are set. ([#55950](https://github.com/kubernetes/kubernetes/pull/55950), [@crassirostris](https://github.com/crassirostris))

* fluentd-gcp-scaler is v0.3.0 ([#61269](https://github.com/kubernetes/kubernetes/pull/61269))
* Updated fluentd in fluentd-es-image to fluentd v1.1.0 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525), [@monotek](https://github.com/monotek))
* fluentd-elasticsearch is v2.0.4 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525))

* - fluentd-gcp runs with a dedicated fluentd-gcp service account ([#54175](https://github.com/kubernetes/kubernetes/pull/54175), [@tallclair](https://github.com/tallclair))
    * - Stop mounting the host certificates into fluentd's prometheus-to-sd container

### 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.

- fluentd-gcp-scaler is unchanged at v0.5.0 since Kubernetes 1.13 ([#68837](https://github.com/kubernetes/kubernetes/pull/68837))
- Fluentd in fluentd-elasticsearch has been upgraded to v1.3.3 ([#71180](https://github.com/kubernetes/kubernetes/pull/71180))
- fluentd-elasticsearch has been updated to v2.4.0 ([#71180](https://github.com/kubernetes/kubernetes/pull/71180))

### Other notable changes

* Fix for service controller so that it won't retry on doNotRetry service update failure. ([#54184](https://github.com/kubernetes/kubernetes/pull/54184), [@MrHohn](https://github.com/MrHohn))
* [fluentd-gcp addon] Fluentd now runs in its own network, not in the host one. ([#54395](https://github.com/kubernetes/kubernetes/pull/54395), [@crassirostris](https://github.com/crassirostris))