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

Knative Autoscaler

Knative has a built-in autoscaling feature that automatically scales the application pods based on the number of HTTP requests it receives. This will increase the pod count when there is increased demand and decrease the pod count when the demand decreases. The pod count will scale to zero when pods are idle and there are no incoming requests.

Knative uses two components, the autoscaler, and the activator, to achieve the previously mentioned functionality. These components are deployed as pods in the knative-serving namespace, as you can see in the following snippet:

NAME                          READY   STATUS    RESTARTS   AGE
activator-7c8b59d78-9kgk5     2/2     Running   0       ...