[keycloak-user] Configuring Keycloak in Standalone Clustered Mode

Hello Keycloak communities, I am configuring Keycloak for production, and we will need to use it in a clustered fashion. I have read about the two possible deployment scenarios “Standalone clustered mode” and “domain clustered mode”. It seems that the “Standalone clustered mode” is the simpler one. Also, we will be using Docker to deploy Keycloak. Therefore, we will not have the burden of managing configuration files manually. The update (configurations and/or Keycloak versions) should always be a matter of stopping and starting a new version of the Docker container. I have one doubt though. It seems pretty magical that to configure Keycloak in HA mode I only need to use “standalone-ha.xml”. How does the discovery process of nodes happen? I mean, are the replicates communicating with each other directly, or is everything via a shared database? Do I need to expose some specific port from my Keycloaks replicas to the network? Or only the standard 443/80 is enough? Thanks in advance for your help ;) -- Rafael Weingärtner