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Become an AWS pro with Terraform by learning its essentials, exploring features, and building projects. Developed by AWS Solution Certified Architects. Get hands-on, no setup, no cleanup, no hassle.

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j01-tinit

j02-tapply

j03-tapply-layout

j04-tplan

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In this course, you will work from the ground up, starting with what Terraform is and the problems it solves. The course will then guide you through the features of Terraform.

You will build on your knowledge with the end goal of you being comfortable building projects using Terraform.

Terraform: From Beginner to Master with Examples in AWS

# Terraform local

A local is Terraform’s representation of a normal programming language variable. Confusingly,
Terraform also has a concept called a variable which is really an input (variables are covered in the [variables] chapter). A local can refer to a fixed value such as a string, or it can be used to refer to an expression such as two other locals concatenated together.

[variables]:
https://www.educative.io/courses/terraform-beginner-master-aws/variables



# Project example
Let's dive into an example:



provider "aws" {
    region = "us-east-2"
}

locals {
    first_part = "hello"
    second_part = "${local.first_part}-there"
    bucket_name = "${local.second_part}-how-are-you-today"
}

resource "aws_s3_bucket" "bucket" {
    bucket = local.bucket_name
}


## Project code in detail
In the code above:

* We define a local block by using the keyword `locals` and then an opening `{`.

* We define each local on a new line by giving it a name. The first local we define is called
`first_part`. 

* We then follow it with an `=` and give it a value. For the `first_part` local, we
give it the value of the string literal `hello`. 

* For the second local `second_part`, we are use the value `"${local.first_part}-there"`. 

* As the whole expression is inside quotes, we need to use
the `${` and `}` around our expression so Terraform evaluates it. 

* To reference a local, we use the
expression syntax `local.local_identifier`. 

* The `second_part` local will be set to `“hello-there”`.
In the `bucket_name` local, we are using the `second_part` local in the expression `"${local.second_part}-how-are-you-today"` which will evaluate to `hello-there-how-are-you-today`.

## Project code in detail
In the code above:

* We define a local block by using the keyword `locals` and then an opening `{`.

* We define each local on a new line by giving it a name. The first local we define is called
`first_part`. 

* We then follow it with an `=` and give it a value. For the `first_part` local, we
give it the value of the string literal `hello`. 

* For the second local `second_part`, we are use the value `"＄{local.first_part}-there"`. 

* As the whole expression is inside quotes, we need to use
the `＄{` and `}` around our expression so Terraform evaluates it. 

* To reference a local, we use the
expression syntax `local.local_identifier`. 

* The `second_part` local will be set to `“hello-there”`.
In the `bucket_name` local, we are using the `second_part` local in the expression `"＄{local.second_part}-how-are-you-today"` which will evaluate to `hello-there-how-are-you-today`.

This lesson will cover Terraform local, how they work, and how to use them.

Getting Started

Introduction to Terraform

Your First Terraform Project

Resources

Providers

Data Sources

Outputs

Locals

Templates and Files

Variables

Using Variables to Create Dynamic Terraform Configurations

Project Layout

Modules

Create SQS Queues Using Terraform Modules

Plans

State

Manipulate State Using Terraform

Workspaces

Provisioners

Advanced Resources

Exercise

Create a VPC with a CIDR Range and Two Subnets with Terraform

Conclusion

Appendix

Locals in Detail

Terraform local

Project example