Day 47: Terraform Variables

Hello everyone!

Variables in Terraform are quite important, as you need to hold values of names of instances, configs, etc.

We can create a variable.tf file which will hold all the variables.

variable "filename" {
default = "/home/ubuntu/terrform-tutorials/terraform-variables/demo-var.txt"
}

variable "content" {
default = "This is coming from a variable which was updated"
}

These variables can be accessed by var object in main.tf

Tasks:

Task 1) Create a local file using Terraform

Create a variable.tf file

variable "filename" {
default = "/home/terraform/var-demo.txt"
}
variable "content" {
default = "This is demo terraform variable file"
}

Create a main.tf file

resource "local_file" "devops" {
filename = var.filename
content = var.content
}

Initializes a new or existing working directory for Terraform

terraform init

terraform plan
terraform apply

Our file has been created.

Data Types in Terraform

Map

A map is a collection of values where each value is identified by a string label

variable.tf

variable "file_contents" {
type = map
default = {
"statement1" = "this is cool"
"statement2" = "this is cooler"
}
}

A map variable named content_map is defined in the example, with a default value of two key-value pairs. Strings serve as both the keys and the values.

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Thanks for reading ;)