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

OpenJDK 8Recommended.
OpenJDK 11

(warning) Note that EJBCA currently does not support Java 11. If running on a platform that comes with Java 11 by default, such as Ubuntu 18.04, switch to using Java 8 by running the following:

$ sudo update-java-alternatives --set java-1.8.0-openjdk-amd64

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 7.0-7.2JBoss EAP 7.2 is currently recommended. See Application Servers.
WildFly 10, 12, 14WildFly 14 is currently recommended. See Application Servers.
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.