Release 0.11.0

CHANGELOG.md

@@ -7,6 +7,17 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [Unreleased]
 
+## [0.11.0] - 2020-06-30
+
+### Important
+
+**Elasticsearch upgrade notice.** We'll be raising Elasticsearch compatibility to 7.* in the next release. Up until now, Segments API supported Elasticsearch 6.*.
+
+We recommend two upgrade scenarios:
+
+- When new release is ready, you can upgrade your existing cluster based on the documentation available at https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-upgrade.html.
+- If you clear your Elastic data recurrently and archive stored events to CSV, you can spin up new v7 cluster and configure [Telegraf](./Docker/telegraf/telegraf.conf) to push data to both v6 and v7 of Elastic. Once you're satisfied with the amount of data in v7 (~1 month tends to be sufficient), wait for the next release and change Elastic address in Segments API to v7 cluster. If there are no issues, you can stop pushing new events to v6 cluster in Telegraf and stop the cluster completely. 
+
 ### Docker
 
 - **BREAKING**: Replaced `spotify/kafka` docker image with `wurstmeister/kafka` as original image was no longer maintained and new installations stopped working. remp/remp#638