As stated in a previous blog-post, at the beginning of this year we started with the project of migrating the open-source application Zurmo CRM into the cloud. In this first blog-post on the progress of this process we will describe our initial plan, show the basic components of a cloud-optimized application and talk about whether to stick with the monolithic architecture style of Zurmo or migrate it to a microservices architecture. We’ll furthermore discuss the first steps we took in migrating Zurmo to the cloud and how we plan to continue.
- We use the term cloud-optimized to describe an application which has the same characteristics as a cloud-native applicaton but is the result of a migration process.
- The basic components of a cloud-optimized application are: Application Core, Enabling Systems, Monitoring- and Management-Systems. All of which have to be scalable and resilient.
- A monolithic architecture style is best suited for smaller applications (little functionality / low number of developers) resp. when starting to build a new application.
- A microservices architecture style is best suited for large applications (lots of functionality / high number of developers). Its benefits are less of a technical nature but more of the way it helps to manage the development and deployment of applications.
- We decided to stick with the monolithic architecture. The first change we did to the application was to horizontally scale the web server with the use of a load balancer and make the application core stateless.