Migrating from RedHat JBoss7 to RedHat JBoss8 involves several steps. Here’s a general outline:
1. Review Documentation: Start by reading the migration guide provided by RedHat for JBoss7 to JBoss8.
2. Backup Current Environment: Make sure to backup your existing JBoss7 environment, including configuration files, deployed applications, and database schemas.
3. Set Up New JBoss8 Environment: Install JBoss8 on a new environment to avoid impacting your current setup. Ensure that all dependencies and required software are also installed.
4. Configuration Changes: Compare the configuration files between JBoss7 and JBoss8. There might be new configurations or changes in how certain configurations are handled. Update your configuration files accordingly.
5. Application Compatibility: Check for any deprecated features or changes in JBoss8 that might affect your application. You might need to update your application code to ensure compatibility.
6. Database Migration: If there are any database schema changes or if you are using features that have been updated, ensure that your database is compatible with the new JBoss version.
7. Testing: Thoroughly test your application on the JBoss8 environment. This includes functional tests, load tests, and integration tests.
8. Deployment: Once everything is tested and confirmed to be working, you can deploy your application to the new JBoss8 environment.
9. Monitor and Rollback Plan: After the migration, closely monitor the application for any issues. Have a rollback plan in case something goes wrong.
Reference URL : https://developers.redhat.com/articles/2022/12/15/how-migrate-apps-jboss-eap-7x-jboss-eap-8-beta#