Utilización de Dockers para desplegar en producción sistemas de información heredados

Abstract

This report addresses a specific case in which a legacy information system hosted on a personal computer needed to be extracted and transferred to a production environment using virtual machines. Since the operating system, library versions, and languages ​​used were not updated on a personal computer, some incompatibilities were found related to these components, resulting in outdated and unsupported software versions. Virtualization on Rocky Linux version 9 was attempted, but, since the operating system was new, it did not include the PHP 7.4 programming language used to develop the information system. This caused a chain reaction in the other components that depended on that module, getting to an insufficient level of virtualization to solve the problem. Using older versions was not the best option due to security risks and lack of support. Therefore, the use of the "Dockers" container platform was explored. This is an executable environment that runs on a main operating system (Rocky Linux) and brings together the necessary elements to run an application or information system. The original operating system (Debian Linux version 11) of the information system was installed on Docker, along with the package of libraries and tools necessary for the application's operation. Encapsulation allowed the security burden to be transferred to the main operating system and allowed the different work environments to be containerized: development, testing, and production within the same virtual machine. This saved time for updating information and facilitated the execution of functional and non-functional tests by allowing the main container to be copied.