Is it possible to connect to more than one cluster?

[gstamp]

Is elastic capable of connecting to more than a single cluster? Based on the docs it seems like you can only specify connection details for a single cluster.

[radar]

I’ve never had to do it myself and so elastic doesn’t currently support it. A quick search turns up https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-cross-cluster-search.html so maybe it depends on how you query the HTTP endpoint.

Do you have an example of what this would look like over HTTP other than that? I ask as that’s elastic’s only way of communicating with ES servers currently.

[gstamp]

In my case I'm not looking to search across two different clusters. Just to be able to make two independent connections and access those two clusters independently.

It's a slightly unusual use-case so I guess I'm not surprised it's not supported.

As an example it might be worth taking a quick look at elasticsearch-elixir which supports multiple connections by defining modules and associating config against those. Similar to how Ecto Repos are defined. Unfortunately elasticsearch-elixir's API is a little more intrusive that I'd prefer - I much prefer the simple approach taken by your library.

[radar]

Seems like it could be done relatively straightforward.

I would imagine configuration like:

config :elastic, clusters: %{
  primary: "primary.example.com",
  secondary: "secondary.example.com"
}

Then to query either cluster:

Elastic.Cluster.[function]

Where function there would be the functions from Elastic.HTTP. There would of course need to be changes done to Elastic.HTTP to support that.

Happy to accept patches for this.