Book Image

Serverless Architectures with Kubernetes

By : Onur Yılmaz, Sathsara Sarathchandra
Book Image

Serverless Architectures with Kubernetes

By: Onur Yılmaz, Sathsara Sarathchandra

Overview of this book

Kubernetes has established itself as the standard platform for container management, orchestration, and deployment. By learning Kubernetes, you’ll be able to design your own serverless architecture by implementing the function-as-a-service (FaaS) model. After an accelerated, hands-on overview of the serverless architecture and various Kubernetes concepts, you’ll cover a wide range of real-world development challenges faced by real-world developers, and explore various techniques to overcome them. You’ll learn how to create production-ready Kubernetes clusters and run serverless applications on them. You'll see how Kubernetes platforms and serverless frameworks such as Kubeless, Apache OpenWhisk and OpenFaaS provide the tooling to help you develop serverless applications on Kubernetes. You'll also learn ways to select the appropriate framework for your upcoming project. By the end of this book, you’ll have the skills and confidence to design your own serverless applications using the power and flexibility of Kubernetes.
Table of Contents (11 chapters)
2. Introduction to Serverless in the Cloud

Kubeless Functions

Once Kubeless is successfully installed, you can now forget about the underlying infrastructure, including VMs and containers, and focus only on your function logic. Kubeless functions are code snippets written in one of the supported languages. As we discussed previously, Kubeless supports multiple programming languages and versions. You can execute the kubeless get-server-config command to get a list of language runtimes supported by your Kubeless version:

$ kubeless get-server-config 

The result is shown in the following screenshot:

Figure 7.23: Kubeless server configuration

In the following sections, we are going to create, deploy, list, invoke, update, and delete a Kubeless function.

Creating a Kubeless Function

Every Kubeless function, regardless of the language runtime, has the same format. It receives two arguments as input and returns a string or object as the response. The first argument of the function is an event,...