The third phase is all about migrating microservices to cloud environments (private, public, and hybrid). There are several public cloud environments across the globe and they offer a number of benefits, such as affordability, scalability, availability, and security. Microservices can accommodate all kinds of changes induced by business needs, end users, expectations, and technology advancements. The scale and simplicity, along with frequent changes, make microservices the perfect tool for enterprise IT in fulfilling the various functional and non-functional requirements. Also, microservices enable the smooth transition from monolithic to microservices applications.

Not all applications are fit for modernization and migration to cloud environments. Applications have to be continuously subjected to a variety of investigations in order to double-check their value and validity. Application rationalization, optimization, and modernization are vital for applications to be continuously relevant for their administrators and users. With the arrival of highly-optimized and -organized IT infrastructures, applications need to be be able to work in newer environments while guaranteeing all the performance requirements. Some applications have to be meticulously refactored to be taken to the cloud. Experts prescribe a series of best practices for legacy modernization and migration. We'll look at one such approach in the following section; more details can be found at https://dzone.com/articles/choosing-a-legacy-software-modernization-strategy.