I followed this, and deployed elasticsearch on Openshift.

First issue is with certificate, when trying to access with HTTPS:

SSL certificate problem: self signed certificate in certificate chain

I can see the elasticsearch-es-http-certs-internal secret created by the above template, and mounted into the elastic pod.

Also, on Events Tab - at Pod page I see an error:

Readiness probe failed: {"timestamp": "2020-05-12T11:36:29+0000", "message": "readiness probe failed", "curl_rc": "7"}

Can you please help - what am I missing?