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 PubSub Triggers

Kubeless functions can be invoked by sending input messages to topics in messaging systems. This method is known as a PubSub mechanism. Currently, Kubeless supports two messaging systems, namely, Kafka and NATS.

In order to create PubSub triggers in Kubeless, we need to have a running Kafka cluster or NATS cluster. Once the Kafka or NATS cluster is ready, we can use kubeless trigger kafka create to create a Kafka trigger or kubeless trigger nats create to create a NATS trigger and associate our PubSub function with the new trigger:

$ kubeless trigger <trigger-type> create <trigger-name> \
                             --function-selector <label-query> \