The Red Hat Single Sign-On or just RHSSO is an enterprise version of Keycloak, which is an open-source Identity and Access Management solution aimed at modern applications and services.
In the last few days, I needed to install RHSSO on Openshift version 4.8, however, I needed to implement small customization in the database connection. By default a non-ephemeral RHSSO installation uses an embedded installation of PostgreSQL database, however, I would change the type of database from PostgreSQL to MySQL, and even change the location of this one to the outside of Openshift.