documentation for usage in combination with security plugins

[rursprung]

there are various security plugins available for elasticsearch (x-pack, SearchGuard and OpenDistro being the most well known).
is there any documentation on how to use elasticsearch-prometheus-exporter in combination with them?

i see two aspects to this:

• this plugin does REST calls to elasticsearch, so if security is enabled there it needs to be able to
  • provide authentication
  • validate & accept the TLS cert (it might well be a self-signed CA at the top!)
• since the prometheus plugin exposes a new path on the existing 9200 port instead of opening a dedicated port it is behind HTTPS (if this is enabled in the security plugin) and behind authentication. but when using prometheus in a kubernetes environment with automatic scrapping there's no good way to configure the scraper to accept self-signed CAs or provide authentication