• Data sources allow Terraform to use information defined outside of Terraform, defined by another separate Terraform configuration, or modified by functions.
• Data sources are like resources, but they don't create anything, just get some data you can refer to.
• A data source is accessed via a special kind of resource …

Terraform Module Basics

• Terraform Modules are containers for multiple resources that are used together.
• A module consists of a collection of .tf and/or .tf.json files kept together in a directory.
• Modules are the main way to package and reuse resource configurations with Terraform.

Root and Child Modules

• Every …

Terraform offer output values make information about your infrastructure available on the command line, and can expose information for other Terraform configurations to use.

About Output Values

• A child module can use outputs to expose a subset of its resource attributes to a parent module.
• A root module can use …

Terraform offers defining local values

About Local Values

• A local value assigns a name to an expression, so you can use the name multiple times within a module instead of repeating the expression.
• If you're familiar with traditional programming languages, it can be useful to compare Terraform modules to function …

About Input Variables

• Terraform offers input variables
• they are called "variables", but in fact these are parameters delivered to the current terraform module
• Variables are declared in a variable section, and they are parsed before other tf sections.
• Variables cannot reference other variables
• Variables …

About Terraform Resources

• Resources are the main thing we want to create with terraform, these are the components that make our infrastructure.
• Terraform intent is to create the resource idempotently, so that running apply more that once will not create multiple resources.
• body of resource contains configuration of …

Terraform Basics

• Terraform Introduction

• Terraform Workflow

• Terraform init and Providers

Terraform Configuration

• Terraform Resources

• input variables

• locals

• outputs

• data sources

• terraform modules

tf files

• After installation, you would start with a directory that has some file with a .tf extension.
• Convention says you should call the main configuration main.tf. but is you don't, terraform will load all files that ends with .tf
• Here's an example of the main configuration part, that should exist within one of you …

Terraform Workflow

There are 3 basic stages to the TF workflow:

1. Write - Author infrastructure as code.
2. Plan - Preview changes before applying.
3. Apply - Provision reproducible infrastructure.

<img
  loading="lazy" …</picture></figure></a></p>

<img
  loading="lazy"
  decoding="async"
  alt="terraform"
  
    class="image_figure image_internal image_unprocessed"
    src="/terraform/terraform.png"
  
  
/>

</picture>

Where to …