Book Image

Mastering AWS Lambda

By : Yohan Wadia, Udita Gupta
Book Image

Mastering AWS Lambda

By: Yohan Wadia, Udita Gupta

Overview of this book

AWS is recognized as one of the biggest market leaders for cloud computing and why not? It has evolved a lot since the time it started out by providing just basic services such as EC2 and S3 and today; they go all the way from IoT to Machine Learning, Image recognition, Chatbot Frameworks, and much more! One of those recent services that is also gaining a lot of traction is AWS Lambda! Although seemingly simple and easy to use, Lambda is a highly effective and scalable compute service that provides developers with a powerful platform to design and develop Serverless event-driven systems and applications. The book begins with a high-level introduction into the world of Serverless computing and its advantages and use cases, followed by a deep dive into AWS Lambda! You’ll learn what services AWS Lambda provides to developers; how to design, write, and test Lambda functions; as well as monitor and troubleshoot them. The book is designed and accompanied with a vast variety of real-world examples, use cases, and code samples that will enable you to get started on your Serverless applications quickly. By the end of the book, you will have gained all the skills required to work with AWS Lambda services!
Table of Contents (11 chapters)

Monitoring Lambda functions using CloudWatch

Throughout the book we have been talking about checking and monitoring your Lambda functions using CloudWatch. It's really not that difficult to set it up and once you have the base ready, you can reuse the same setup for monitoring almost all of your functions. So, let us quickly recap on how to monitor Lambda functions using CloudWatch!

To start off, we first need to prepare the base that we talked about. The base here is nothing more that the correct set of policies that allow your function to send its logs to CloudWatch. In most cases, your functions will require rights to create log groups and streams in CloudWatch, as well as to put log events into that particular stream. The log group creation, as well as the stream creation, is all taken care of by CloudWatch itself. Here is a simple IAM policy that will basically allow...