Why Do We Want Serverless?
The productivity of software development and product teams utilising Serverless is outperforming teams using a traditional Infrastructure as Code (IaC) approach. By utilising Serverless we can deliver more reliable software faster, reduce operational complexity and focus on our customer needs.Why is the level of productivity between these approaches so fundamentally different?A traditional IaC delivery requires a team to manage the entire technology stack. This includes tasks like installing and updating operating systems, deploying and updating software packages such as databases, application runtimes, patching and managing auto-scaling, load balancing, certificate management and many more. None of those activities are perceived by a customer as a ‘feature’ or customer experience improvement. They are rather taken for granted.We do not need to perform any of these tasks when we use Serverless. AWS will manage all these responsibilities for us and probably much better than we would ever be able to.By eliminating these tasks we can focus on the customer facing features.
The following diagram illustrates the difference between a traditional IaS approach versus a Serverless approach.
Accelerate our Approach with AWS Native Services
AWS offers a variety of Serverless Technologies for different use cases.Let’s have a look at a very common use case: a public facing web application. By using Serverless we can implement and operate the solution in a much more efficient way compared to traditional IaS solutions. The solution is typically hosted behind a Content Distribution Network (CDN) that caches static content closer to the user’s geographical location. Hence, a CDN can significantly reduce the latency. The AWS out-of-the-box CDN solution is called CloudFront.We are now going through the common building blocks of our Serverless web application. We will also look at what we will need to consider for our deployment.We can see that all key aspects of web application can be addressed with Serverless technologies. Due to the flexibility of Serverless architectures we can plugin other tools that might offer additional functionality that are not available out of the box.Therefore Serverless should be one of the first architecture considerations if we want to accelerate our web application delivery and improve our customer focus.
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