* 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))

- 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))

- 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-es-image is unchanged from 1.10: v1.1.0 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525))
* fluentd-elasticsearch is unchanged from 1.10: v2.0.4 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525))
* fluentd-gcp is unchanged from 1.10: v3.0.0. ([#60722](https://github.com/kubernetes/kubernetes/pull/60722))

  -  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))

*   [fluentd-elasticsearch addon] Elasticsearch service name can be overridden via env variable ELASTICSEARCH_SERVICE_NAME ([#54215](https://github.com/kubernetes/kubernetes/pull/54215),[ @mrahbar](https://github.com/mrahbar))

### **Multicluster**

#### **Federation**

* 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))

* Fix a bug under the rkt runtime whereby image-registries with ports would not be fetched from ([#34375](https://github.com/kubernetes/kubernetes/pull/34375), [@euank](https://github.com/euank))
* Updated default Elasticsearch and Kibana used for elasticsearch logging destination to versions 2.4.1 and 4.6.1 respectively. ([#34969](https://github.com/kubernetes/kubernetes/pull/34969), [@Crassirostris](https://github.com/Crassirostris))

- 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))