Terraform infrastructure as code for mere mortals
Download as PPTX, PDF1 like101 views
Terraform is an infrastructure as code tool that allows users to define and provision cloud infrastructure resources through configuration files. It has three main components - the Terraform executable, configuration files with the .tf extension that define infrastructure as code, and Terraform state files with the .tfstate extension that track the current and desired state of resources. Configuration files use variables, providers that connect to cloud platforms, and resources to define what infrastructure to provision. The Terraform executable is then used to plan changes, apply configurations to provision resources, and destroy resources.
Terraform infrastructure as code for mere mortals
- 1. Terraform Infrastructure as Code for Mere Mortals
- 2. What’s the scenario? ● Provisioning Resources ○ What you need to deliver your solution ● Planning Updates ○ Things can change, so what? ● Using Source Control ○ Keep tracking of all changes and the big picture
- 3. Terraform Components ● Terraform Executable ○ Download, add to the path and let’s play! ● Terraform File ○ Where you design your infrastructure. (*.tf) ● Terraform State ○ Records the state of our infrastructure. (*.tfstate)
- 4. Terraform Components ● Variables ○ Used to replace placeholders ● Providers and Credentials ○ Basic configuration to interact with some Cloud Provider ● Resources ○ The infrastructure per se hosted in a provider
- 5. Terraform Components - Variables example # Variables Example variable “aws_access_key” {} variable “aws_secret_key” {} variable “private_key_path” {} variable “key_name” { default = “ExampleKey” }
- 6. Terraform Components - Providers example # Providers Example provider “aws” { access_key = “${var.aws_access_key}” secret_key = “${var.aws_access_key}” region = “us-east-1” }
- 7. Terraform Components - Resources example # Resources Example resourcer “aws_instance” “resource_name” { ami = “ami-c5866s22” instance_type = “m3-large” key_name = “${var.key_name}” ... }
- 8. Terraform Components - Output example # Output Example output “aws_instance_public_dns” { value = “${aws_instance.foo_instance.public_dns}” }
- 9. Terraform Components - Terraform executable (Planning) $ terraform plan - Shows what will be done (Provisioning) $ terraform apply - Apply the what is in the code (Deprovisioning) $ terraform destroy - Destroy the what is in the code