The use of has very quickly become an accepted approach for organizations deploying cloud applications, with a plethora of choices available for deployment. Even traditionally conservative organizations are making partial use of some serverless technologies. Most of the discussion goes to Functions as a Service (e.g., AWS Lambda, , ) while the appropriate patterns for use are still emerging. Deploying serverless functions undeniably removes the nontrivial effort that traditionally goes into server and OS configuration and orchestration. Serverless functions, however, are not a fit for every requirement. At this stage, you must be prepared to fall back to deploying containers or even server instances for specific requirements. Meanwhile, the other components of a serverless architecture, such as Backend as a Service, have become almost a default choice.
A approach replaces long-running virtual machines with ephemeral compute power that comes into existence on request and disappears immediately after use. Our teams like the serverless approach; it's working well for us and we consider it a valid architectural choice. Note that serverless doesn't have to be an all-or-nothing approach: some of our teams have deployed a new chunk of their systems using serverless while sticking to a traditional architectural approach for other pieces. Although AWS Lambda is almost synonymous with serverless, the other major cloud providers all have similar offerings, and we also recommend assessing niche players such as .
is an approach that replaces long-running virtual machines with ephemeral compute power that comes into existence on request and disappears immediately after use. Since the last Radar, we have had several teams put applications into production using a "serverless" style. Our teams like the approach, it¡¯s working well for them and we consider it a valid architectural choice. Note that serverless doesn¡¯t have to be an all-or-nothing approach: some of our teams have deployed a new chunk of their systems using serverless while sticking to a traditional architectural approach for other pieces.
Serverless architecture replaces long-running virtual machines with ephemeral compute power that comes into existence on request and disappears immediately after use. Examples include and AWS Lambda. Use of this architecture can mitigate some security concerns such as security patching and SSH access control, and can make much more efficient use of compute resources. These systems cost very little to operate and can have inbuilt scaling features (this is especially true for AWS Lambda). An example architecture could be a JavaScript app with static assets served by a CDN or S3 coupled with AJAX calls served by the API Gateway and Lambda. While serverless architectures have significant benefits, there are drawbacks too: Deploying, managing and sharing code across services is more complex, and local or offline testing is more difficult if not impossible.
