Hey Bernd,
I would like to set a ruleset to monitor my Elasticsearch cluster health status using the REST API. I found a curl command to set a ruleset, https://checkmk.com/cms_web_api_references.html but its not very helpful in terms of how the request should look when making an Active check via HTTP.
To summarise, I want to defuine a monitored service that returns my ELK cluster health status.