Learn how to build projects using Terraform.

DevOps for Developers

In this module, you will work from the ground up, starting with what Terraform is and the problems it solves. It 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

# Foreach
The `for_each` construct allows you to create a set of resources similar to what we have just seen before by using the count.
A `for_each` statement is more useful when you are projecting a set of values
into a set of resources though.



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

locals {
  fruit = toset(["apple", "orange", "banana"])
}

resource "aws_sqs_queue" "queues" {
    for_each = local.fruit
    name = "queue-${each.key}"
}

output "queue-apple-name" {
  value = aws_sqs_queue.queues["apple"].name
}


A few things have changed from the count example. Firstly we have defined a local called "fruit" to hold a list of all of the names of queues we want to create. The value of the fruit is an array that we are then passing to the `toset` function. We do this because the foreach operator only
works with a map or a set (we will see why shortly). A set is a distinct set of values, whereas a list can contain the same value multiple times. Inside the `queues` resource, we use another special attribute, `for_each`. 


We set this to the value of our set. This tells Terraform that we want to run the code block once for each item in our set. To access the current value within the resource,
we can use the special value `each.key`. To reference a created resource using a `for_each`, we have to
index the value from the set. In the above example, we select the queue created with the
name apple by using `["apple"]`.

In this lesson we'll discuss the advanced "foreach" resource.