Support for specifying muliple elasticsearch hosts

[cen1]

Apiman Version

master

Apiman Manager Distro

WildFly

Apiman Gateway Distro

WildFly

Java Version

11

Operating System

Centos 8

Are you running Apiman in a container, or on an orchestration platform?

No (Bare Metal)

Describe the bug

It seems that it is not possible to specify multiple ES hosts when running against a proper multi node production ES cluster.

A look into the code also reveals that a single host is used:

apiman/common/es/src/main/java/io/apiman/common/es/util/DefaultEsClientFactory.java

Line 105 in 347f4a8

RestClientBuilder clientBuilder = RestClient.builder(new HttpHost(host, port, protocol))

even though the builder can accept multiple.

Is this just an original sin that was overlooked when ES support was added? Is there a way to do it that I missed?

I saw some workarounds with keepalived thrown across the ES nodes but that is not a good solution, all ES libraries I have ever used accept an array and handle the proper selection internally.

Expected behaviour

No response

Actual behaviour

No response

How to Reproduce

No response

Relevant log output

No response

Anything else?

No response