1)What is terraform?

Terraform is an open source “Infrastructure as Code” tool, created by HashiCorp.

A declarative coding tool, Terraform enables developers to use a high-level configuration language called HCL (HashiCorp Configuration Language) to describe the desired “end-state” cloud or on-premises infrastructure for running an application. It then generates a plan for reaching that end-state and executes the plan to provision the infrastructure.

2)One example terraform program

variable “include_ec2_instance” 

{

 type = bool default = true

 } 

resource “aws_instance” “example”

 { 

count = var.include_ec2_instance ? 1 :0 # (other resource arguments…) 

} 

output “instance_ip_address”

 {

 value = one(aws_instance.example[*].private_ip) 

}

3)List of 5 terraform commands and its use

  import             Import existing infrastructure into Terraform
  apply              Builds or changes infrastructure
  get                Download and install modules for the configuration
  push               Upload this Terraform module to Terraform Enterprise to run
 refresh            Update local state file against real resources