Add an option to disallow deleting all indices

[karmi]

A setting called: action.disable_delete_all_indices (defaults to false) that can be set to true in order to disable deleting all indices in a single API call.

curl -X DELETE localhost:9200

It would, obviously, be a very good idea to set this as false in a production elasticsearch.yml :)

EDIT: Updated wording

[JustinTArthur]

You mean a good idea to set it to true in production, right?

[Erni]

Why not add this option (and all the possible ones) in elasticsearch.yml? Even if they were commented by default, people could see that they are available.