Before installing EJBCA, review this list of required software to be installed. 

Java
OpenJDK 8Supported.
OpenJDK 11Supported and recommended.

OpenJDK is available for both Linux and Windows. 

There are also commercial JDK versions available, which may work but are not regularly regression tested by PrimeKey.

The Oracle JDK (starting April 16, 2019) is one example of a commercial JDK. For more information, see Oracle Java SE Support Roadmap and Java SE Development Kit 8 Downloads. 

Application Server
JBoss EAP 7.4JBoss EAP 7.4 is currently recommended. See Application Servers.
WildFlyWildFly 26 is currently recommended. See Application Servers. WildFly makes frequent releases, and newer versions usually work well, but may not be regularly tested by PrimeKey.
Databases
MariaDB, MySQL et alEJBCA supports multiple relational databases such as MariaDB, MySQL, Oracle Database, PostgreSQL and others. MariaDB and MySQL are recommended. For more information, see Creating the Database.
Build Tool
Apache Ant 1.8 or later

JavaScript support may be needed in Ant for some components.

Next Step

Next, configure properties prior to the installation according to information in Managing EJBCA Configurations.