Serverless Microservices with Python on Kubernetes

Serverless Computing is Exploding

As we move to the different models of production, distribution, and management when it comes to applications, it only makes sense that abstracting out the, behind the scenes processes should be handled by third parties, in a move towards further decentralization. And that’s exactly what serverless computing does – and startups and big companies are adopting this new way of running applications.

In this post, we will discover answers to questions: What Serverless is all about and how does this new trend affect the way people write and deploy applications?

Serverless Computing

"Serverless” denotes a special kind of software architecture in which application logic is executed in an environment without visible processes, operating systems, servers or virtual machines. It’s worth mentioning that such an environment is actually running on the top of an operating system and use physical servers or virtual machines, but the responsibility for provisioning and managing the infrastructure entirely belongs to the service provider. Therefore, a software developer can focus more on writing code.

Serverless Computing Advances the way Applications are Developed

Serverless applications will change the way we develop applications. Traditionally a lot of business rules, boundary conditions, complex integrations are built into applications and this prolongs the completion of the system as well as introduces a lot of defects and in effect, we are hard wiring the system for certain set of functional requirements. The serverless application concept moves us away from dealing with complex system requirements and evolves the application with time. It is also easy to deploy these microservices without intruding the system.

Below figure shows how the way of application development changed with time.

Monolith- A monolith application puts all its functionality into a single process and scale by replicating the monolith on multiple servers.

Microservice- A microservice architecture puts each functionality into a separate service and scale by distributing these services across servers, replicating as needed.

FaaS- Distributing Microservices further into functions which are triggered based on events.

Monolith => Microservice => FaaS

Let’s get started with the deployment of a Serverless Application on NexaStack. To create a function, you first package your code and dependencies in a deployment package. Then, you upload the deployment package on our environment to create your function.

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Database integration for your application

Creating a Deployment Package – Organizing Code and Dependencies

To create a function you first create a function deployment package, a .zip file consisting of your code and any dependencies.

Creating function

Testing

Serverless Architecture: Still in development

There are some problems with the maturity of the FaaS technologies at this point. There is no organizational framework for FaaS. This means that your company may write hundreds or even thousands of these functions and after a while, nobody may know what functionality was included in what function and what functions are still used or if the code is replicated.

One option to avoid the cold start is to make sure your function remains in an active state by sending periodic requests to your function.

Summary

Serverless Framework is growing both in size itself and in the community, so jump on board and discuss business opportunities with us. KNOW MORE...

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