Book Image

Infrastructure as Code with Azure Bicep

By : Yaser Adel Mehraban
1 (1)
Book Image

Infrastructure as Code with Azure Bicep

1 (1)
By: Yaser Adel Mehraban

Overview of this book

It’s no secret that developers don’t like using JSON files to declare their resources in Azure because of issues such as parameter duplication and not being able to use comments in templates. Azure Bicep helps resolve these issues, and this book will guide you, as a developer or DevOps engineer, to get the most out of the Bicep language. The book takes you on a journey from understanding Azure Resource Manager (ARM) templates and what their drawbacks are to how you can use Bicep to overcome them. You will get familiar with tools such as Visual Studio Code, the Bicep extension, the Azure CLI, PowerShell, Azure DevOps, and GitHub for writing reusable, maintainable templates. After that, you’ll test the templates and deploy them to an Azure environment either from your own system or via a continuous integration and continuous delivery (CI/CD) pipeline. The book features a detailed overview of all the Bicep features, when to use what, and how to write great templates that fit well into your existing pipelines or in a new one. The chapters progress from easy to advanced topics and every effort has been put into making them easy to follow with examples, all of which are accessible via GitHub. By the end of this book, you’ll have developed a solid understanding of Azure Bicep and will be able to create, test, and deploy your resources locally or in your CI/CD pipelines.
Table of Contents (17 chapters)
1
Section 1: Getting Started with Azure Bicep
6
Section 2: Azure Bicep Core Concepts
11
Section 3: Deploying Azure Bicep Templates

Understanding expressions

Azure Bicep supports a variety of expressions and operators that will help you create more dynamic templates and flows within your deployment, whether it is to decide which resource gets deployed and which ones do not, or when you are accessing elements within an object or array to calculate values.

Let's start with unary operators.

Unary operators

There are two unary operators, unary NOT (!) and unary minus (-), both of which operate on a single operand.

Unary NOT

This operator negates the specified value and is equivalent to the not function in ARM templates. Here is an example:

param isProd bool = true
var shouldDeployFirewall = !isProd

In the preceding code snippet, the value of the shouldDeployFirewall variable would be false, which can be used later to decide whether to deploy a firewall or not.

Unary minus

This operator multiplies the operand by -1. The result of applying this operator to a positive integer returns a...