• Manage infrastructure on multiple cloud platforms
• Human-readable
• Track resource changes

~~~graph-easy --as=boxart
[ Dev ] -> [ IaC ] -> [Plan] -> [Apply] -> [AWS]
[Apply] -> [Azure]
[Apply] -> [K8s]
~~~

To deploy infrastructure with Terraform:

• Scope - Identify the infrastructure for your project.
• Author - Write the configuration for your infrastructure.
• Initialize - Install the plugins Terraform needs to manage the infrastructure.
• Plan - Preview the changes Terraform will make to match your configuration.
• Apply - Make the planned changes.

resource "local_file" "foo" {
  content  = "foo!"
  filename = "${path.module}/foo.txt"
}

resource "random_string" "password" {
  length  = 18
  upper   = true
  lower   = true
  number  = true
  special = false
}

output "password" {
  value = random_string.password.result
}

• Data sources provide dynamic information about entities that are not managed by the current Terraform and configuration.
• Variables provide static information.
• Data sources allow data to be fetched or computed for use elsewhere in Terraform configuration.

data "aws_ami" "free" {
  most_recent = true
  owners      = ["amazon"]

  filter {
    name   = "name"
    values = ["amzn2-ami-hvm-2.0.????????.?-x86_64-gp2"]
  }
}

variable "instance_name" {
  description = "Value of the Name tag for the EC2 instance"
  type        = string
  default     = "TerraformDemo"
}

• terraform init
• terraform validate
• terraform plan
• terraform apply
• terraform show

• terraform-cli
• aws-cli
• graph-easy

• Terraform Doc
• Terraform Register
• Terraform AWS Doc