This is a short and simple example on how to build a proper Keycloak cluster, using JDBC_PING as discovery protocol and an NGINX server as reverse proxy.

Please see also my video about Keycloak Clustering: http://www.youtube.com/watch?v=P96VQkBBNxU

(Steps taken from: https://www.baeldung.com/x-509-authentication-in-spring-security)

All passwords: "secret"

openssl req -x509 -sha256 -days 3650 -newkey rsa:4096 -keyout rootCA.key -out rootCA.crt