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# Terraform Workshop
---
## What is Terraform
IaC (Infrastructure as Code) framework which enables programatic definition,
deployment and management of infrastructure resources for cloud and on-premises
in a declarative manner. It targets all major cloud platforms (GCP, AWS, Azure, DO etc.)
---
## Why do We Need it
* Standardization of deployment to ensure a consistent state
* Version control
* Deploying an additional clone env for testing
* Easier auditability to improve quality and security
* Modular - reuse & ease of understanding
* Resource Graph (dependency graph + parallel execution when possible)
* Version control
* Enables use of hardened deployment pipelines
* Enables immutable infrastructure
---
## Human-Readible Configuration Language
* HashiCorp Configuration Language (HCL) or JSON
```
provider "aws" {
region = "us-west-2"
}
resource "aws_instance" "example" {
ami = "ami-0c55b159cbfafe1f0" # Amazon Linux 2 AMI ID
instance_type = "t2.micro"
tags = {
Name = "HelloWorldEC2Instance"
}
}
output "instance_public_ip" {
value = aws_instance.example.public_ip
}
```
---
## Workflow
* Write your configuration file
* Use the the `terraform plan` action to simulate deployment of resources and assess the outcome
* Use `terraform apply` to actually deploy resources
---
# Exercise
* Set up local credentials for your cloud platform of choice
* Write a file that deploys an EC2 instance
* Use `terraform plan` and `terraform apply` in order to deploy the resource
* Remove the resource by updating your configuration file and using `terraform plan` and `terraform apply`
---
# Extend Configuration
* Add a VPC
* Define security group that limits ingress and egress to port 22
* Add SSH key(s) which may connect to the instance
---
# Next Steps
* ...