Keep in mind there is an official HackerNews plug-in for filebeats that can stream comments live to Elasticsearch. You can find these clusters online streaming in the very comments we make now to alert groups of down voters to smother you. Something to think about / use Binary Edge and the query “elasticsearch.docs:>100000” to find the really big clusters. No password at all fully exposed and there are 7,600 of those online worldwide now.