Can the latest version of Fluentd, only work with ES-6, or also with ElasticSearch-2?
Background:
We want to know if we can temporarily build a new ELK-6 stack, update fluentd and have updated fluend send all data also both ES-6 and ES-2 at the same time.
Also see Simplest upgrade data from ElasticSearch 2 to ElasticSearch 6? for more details.