Book Image

Accelerating DevSecOps on AWS

By : Nikit Swaraj
Book Image

Accelerating DevSecOps on AWS

By: Nikit Swaraj

Overview of this book

Continuous integration and continuous delivery (CI/CD) has never been simple, but these days the landscape is more bewildering than ever; its terrain riddled with blind alleys and pitfalls that seem almost designed to trap the less-experienced developer. If you’re determined enough to keep your balance on the cutting edge, this book will help you navigate the landscape with ease. This book will guide you through the most modern ways of building CI/CD pipelines with AWS, taking you step-by-step from the basics right through to the most advanced topics in this domain. The book starts by covering the basics of CI/CD with AWS. Once you’re well-versed with tools such as AWS Codestar, Proton, CodeGuru, App Mesh, SecurityHub, and CloudFormation, you’ll focus on chaos engineering, the latest trend in testing the fault tolerance of your system. Next, you’ll explore the advanced concepts of AIOps and DevSecOps, two highly sought-after skill sets for securing and optimizing your CI/CD systems. All along, you’ll cover the full range of AWS CI/CD features, gaining real-world expertise. By the end of this AWS book, you’ll have the confidence you need to create resilient, secure, and performant CI/CD pipelines using the best techniques and technologies that AWS has to offer.
Table of Contents (15 chapters)
1
Section 1:Basic CI/CD and Policy as Code
5
Section 2:Chaos Engineering and EKS Clusters
9
Section 3:DevSecOps and AIOps

Writing Sentinel policies to enforce rules on Terraform templates

In this section, we will learn about HashiCorp Sentinel and how we can enable it in Terraform Cloud. After that, we will write a Sentinel policy to enforce rules on Terraform templates.

HashiCorp Sentinel

Sentinel is a framework for policy and language, built in software to enforce fine-grained, logic-based policy decisions. It is an enterprise feature of Terraform, Vault, Nomad, and Consul. Sentinel is easy to learn and needs minimal programming experience. Sentinel policies are written in a text file using the Sentinel language with the .sentinel file extension. The Sentinel language has a main function, whose value decides whether a policy passes or fails. Here's an example:

main = 9 > 3

When you execute this policy using a Sentinel command, the result will be true. Sentinel handles the result of the execution in levels known as an enforcement level. Sentinel has three enforcement levels:

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