I use OSS version of Elasticsearch 6.8.0 + Kibana and I'm not able to turn on monitoring features. This page - https://www.elastic.co/what-is/open-x-pack - says that "Starting with version 6.3, all of the free X-Pack features (monitoring, Search Profiler, Grok Debugger, zoom levels in Elastic Maps Service, dedicated APM UIs, and more) ship with the default distributions of Elasticsearch, Kibana, Beats, and Logstash."
So I would expect that since XPack is opensource and I'm using opensource version of Elasticsearch I'm able to use monitoring in Kibana.
When I add "xpack.monitoring.collection.enabled: true" to "elasticsearch.yml" it fails to start complaining that it does not know that setting. So how is it with OSS version and monitoring?