Summary

This pattern walks you through the steps for migrating from an on-premises Red Hat Enterprise Linux (RHEL) 6.9 or later system that’s running IBM WebSphere Application Server (WAS) to RHEL 8 running Apache Tomcat on an Amazon Elastic Compute Cloud (Amazon EC2) instance. 

The pattern can be applied to the following source and target versions: 

• WebSphere Application Server 7.x to Apache Tomcat 8 (with Java 7 or later) 

• WebSphere Application Server 8.x to Apache Tomcat 8 (with Java 7 or later) 

• WebSphere Application Server 8.5.5.x to Apache Tomcat 9 (with Java 8 or later) 

• WebSphere Application Server 8.5.5.x to Apache Tomcat 10 (with Java 8 or later) 

Prerequisites and limitations

Prerequisites  

• An active AWS account 

• Source Java code, with the following assumptions:

  • Uses the Java Development Kit (JDK) version of Java 7 or later

  • Uses the Spring or Apache Struts framework

  • Doesn't use the Enterprise Java Beans (EJB) framework or any other WebSphere server functionality that's not readily available for Tomcat

  • Primarily uses servlets or Java Server Pages (JSPs) 

  • Uses Java Database Connectivity (JDBC) connectors to connect to databases  

• Source IBM WebSphere Application Server version 7.x or higher 

• Target Apache Tomcat version 8.5 or higher  

Architecture

 Source technology stack

• A web application built using the Apache Struts Model-View-Controller (MVC) framework 

• A web application running on IBM WebSphere Application Server version 7.x or 8.x

• A web application that uses a Lightweight Directory Access Protocol (LDAP) connector to connect to an LDAP directory (iPlanet/eTrust) 

• An application that uses IBM Tivoli Access Manager (TAM) connectivity to update the TAM user password (in the present implementation, applications use PD.jar)

 On-premises databases

• Oracle Database 21c (21.0.0.0)

• Oracle Database 19c (19.0.0.0)

• Oracle Database 12c Release 2 (12.2.0.1)

• Oracle Database 12c Release 1 (12.1.0.2)

Target technology stack

• Apache Tomcat version 8 (or later) running on RHEL on an EC2 instance

• Amazon Relational Database Service (Amazon RDS) for Oracle

For more information about the Oracle versions supported by Amazon RDS, see the Amazon RDS for Oracle website.

Target architecture

https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/migrate-from-ibm-websphere-application-server-to-apache-tomcat-on-amazon-ec2.html?did=pg_card&trk=pg_card