- fluentd has been updated to v1.5.1 ([#79014](https://github.com/kubernetes/kubernetes/pull/79014))
- fluentd-elasticsearch plugin has been updated to v3.5.3 ([#79014](https://github.com/kubernetes/kubernetes/pull/79014))
- elasticsearch has been updated to v7.1.1 ([#79014](https://github.com/kubernetes/kubernetes/pull/79014))

* Upgrade Elasticsearch/Kibana to 5.5.1 in fluentd-elasticsearch addon ([#48722](https://github.com/kubernetes/kubernetes/pull/48722), [@aknuds1](https://github.com/aknuds1))
        * Switch to basing our image of Elasticsearch in fluentd-elasticsearch addon off the official one
        * Switch to the official image of Kibana in fluentd-elasticsearch addon

- Fluentd in fluentd-elasticsearch is unchanged from v1.11:  v1.2.4 ([#67434](https://github.com/kubernetes/kubernetes/pull/67434))
- fluentd-elasticsearch is unchanged from 1.10: v2.0.4 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525))

#### **Other**

*   Fix a typo in prometheus-to-sd configuration, that drops some stackdriver metrics. ([#56473](https://github.com/kubernetes/kubernetes/pull/56473),[ @loburm](https://github.com/loburm))
*   [fluentd-elasticsearch addon] Elasticsearch and Kibana are updated to version 5.6.4 ([#55400](https://github.com/kubernetes/kubernetes/pull/55400),[ @mrahbar](https://github.com/mrahbar))

- 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))
- The fluent-plugin-kubernetes_metadata_filter plugin in fluentd-elasticsearch has been updated to v2.1.6 ([#71180](https://github.com/kubernetes/kubernetes/pull/71180))

- Elasticsearch supports automatically setting the advertise address ([#85944](https://github.com/kubernetes/kubernetes/pull/85944), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle and Instrumentation]

- 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 in fluentd-elasticsearch has been upgraded to v1.4.2. ([#76854](https://github.com/kubernetes/kubernetes/pull/76854))
- fluentd-elasticsearch has been updated to v2.5.2. ([#76854](https://github.com/kubernetes/kubernetes/pull/76854))
- event-exporter has been updated to v0.2.5. ([#77815](https://github.com/kubernetes/kubernetes/pull/77815))

* Fix a bug that fluentd doesn't inject container logs for CRI container runtimes (containerd, cri-o etc.) into elasticsearch on GCE. ([#61818](https://github.com/kubernetes/kubernetes/pull/61818), [@Random-Liu](https://github.com/Random-Liu))

* Stackdriver Logging deployment exposes metrics on node port 31337 when enabled. ([#47402](https://github.com/kubernetes/kubernetes/pull/47402), [@crassirostris](https://github.com/crassirostris))

* Upgrade Elasticsearch Addon to v5.4.0 ([#45589](https://github.com/kubernetes/kubernetes/pull/45589), [@it-svit](https://github.com/it-svit))

#### Internal storage layer