So recently I've been trying to get astronomical data in Elasticsearch with Logstash to visualize it with Kibnana. I've asked some questions here before to get it done. And I'm happy to say I got it working. I promissed to make a video about how I did it. And I actually made two: one about the general story and one about the code.
http://marcel-jan.eu/datablog/2018/05/13/making-a-hertzsprung-russell-diagram-from-gaia-dr2-data-with-elasticsearch/
I've made the code of the Elasticsearch index mapping, the Logstash config file and the Kibana Vega code available on GitHub:
https://github.com/Marcel-Jan/fun-with-Gaia