New supported distribution checker fails for AWS Managed Elasticsearch

[nkazarian-spokeo]

We use this library and mainly talk to AWS' managed elasticsearch service, which seems to not play nice with the most recent version of this library

Elasticsearch version (bin/elasticsearch --version): 7.4

elasticsearch-py version (elasticsearch.__versionstr__): 7.14.0

Description of the problem including expected versus actual behavior:

We expect connecting to ES to work just fine via this library, instead we get:

Unable to connect to Elasticsearch cluster. Error: The client noticed that the server is not a supported distribution of Elasticsearch

We also have issues with curator since it sources this same library. I imagine this has a huge blast radius if Amazon ES is going to be problematic with the new changes/checks for "supported distributions"?

[sethmlarson]

The Elasticsearch clients go through rigorous testing and validation against the official Elasticsearch distribution coming from Elastic. Since the AWS Elasticsearch Service has incompatible APIs with Elasticsearch itself, either by missing APIs or has incompatible format, we do not support it. Please consider using Elastic Cloud for an official and formally supported hosted Elasticsearch distribution.

[nkazarian-spokeo]

So it was (unofficially) supported until 2 days ago? Seems like more of an oversight to me, a missed edge case perhaps. I would have liked something in the changelog that would've highlighted this change (a warning to those using managed Elasticsearch service on AWS or other cloud providers too perhaps), as it occurred quite abruptly and disrupted workflows for us.