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In this example, the instance_count variable is defined with a type of number, and it is given a default value of 1. The AWS provider is then configured to use the us-west-2 region.
The aws_instance resource is used to launch Amazon EC2 instances. The count argument is set to the value of the instance_count variable, which means that Terraform will launch instance_count number of EC2 instances.
You can change the value of instance_count by modifying the default value in the variable definition, or you can specify a different value when you run Terraform by using the -var flag. For example, if you want to launch 3 instances, you can run the following command:
| variable "instance_count" { | |
| type = number | |
| default = 1 | |
| } | |
| provider "aws" { | |
| region = "us-west-2" | |
| } | |
| resource "aws_instance" "example" { | |
| count = var.instance_count | |
| ami = "ami-0c55b159cbfafe1f0" | |
| instance_type = "t2.micro" | |
| } |
by $ terraform apply -var ‘instance_count=3’
| provider "aws" { | |
| region = "ap-south-1" | |
| access_key = "" | |
| secret_key = "" | |
| } | |
| variable "numofusers" { | |
| type = number | |
| description = "This is for demo of number variable" | |
| default = 3 | |
| } | |
| resource "aws_iam_user" "example" { | |
| count = "${var.numofusers}" | |
| name = "rajesh.${count.index}" | |
| } |
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