In this knolx, I'll be discussing about the components involved in setting up an EC2 instance and how we can achieve it via Terraform

1. Presented By: Yatharth Sharma
Understanding AWS
with Terraform

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3. Agenda
01 Introduction to Cloud Providers - AWS
02 Benefits
03 AWS Infrastructure
04 Setting up Infrastructure - From Scratch
05 Infrastructure as Code - Terraform
04 Demo

4. Introduction to Cloud Providers - AWS
General Client-Server Architecture
Server Components
● Compute (CPU)
● Memory (RAM)
● Storage
Database (Structured Storage)
Network Devices
● Routers
● Switches
● DNS server

5. Benefits
● On Demand service
● Pay as you go
● Access resources instantly
● Easy to access/use

6. AWS Infrastructure
● AWS is global
○ Regions
■ Availability Zones
● Data Centers
○ Edge Locations (Point of Presence)
AWS Infrastructure

7. Setting up Infrastructure -
From Scratch
LucidChart

8. Setting up Infrastructure -
From Scratch
● VPC - Logically Isolated sections where AWS Resources are launched.
● Subnet - Logical subdivision of an IP network.
● Internet Gateway - Highly available VPC component that allows communication between your
VPC and the internet.
● Elastic IP - An Elastic IP address is a static IPv4 address.
● NAT Gateway - Enable instances in a private subnet to connect to the internet or other AWS
services, but prevent the internet from initiating a connection with those instances.
● Route Tables - Contains a set of rules, called routes, that are used to determine where network
traffic from your subnet or gateway is directed.
● Instance - Server holding compute, storage and memory

9. Infrastructure as Code
Provisioning Infrastructure via s/w to achieve consistent and predictable
environments.
Benefits of IaC
● Automate deployment
● Consistent environments
● Reusable components
● Documented Architecture

10. IaC - Terraform
Features of Terraform
● Defined in code
● Stored in source control
● Declarative Syntax
● Idempotent
● Follows Push mechanism

11. IaC - Terraform
Terraform Concepts
● Provider
○ AWS, Azure, GCP
terraform {
required_providers {
aws = {
source = "hashicorp/aws"
version = "3.23.0"
}
}
}
provider "aws" {
# Configuration options
}

12. IaC - Terraform
Terraform Concepts
● Resources
○ VPC, Subnet, Instance, RDS
resource "aws_vpc" "main" {
cidr_block = "10.0.0.0/16"
instance_tenancy = "default"
tags = {
Name = "main"
}
}

13. IaC - Terraform
Terraform Concepts
● Variables
○ Image id, AZs etc
variable "user_information" {
type = object({
name = string
address = string
})
sensitive = true
}
resource "some_resource" "a" {
name = var.user_information.name
address = var.user_information.address
}

14. IaC - Terraform
Terraform Concepts
● Data
data "aws_ami" "web" {
filter {
name = "state"
values = ["available"]
}
filter {
name = "tag:Component"
values = ["web"]
}
most_recent = true
}
resource "aws_instance" "web" {
ami = data.aws_ami.web.id
instance_type = "t1.micro"
}

15. IaC - Terraform
Terraform Concepts
● Output
output "instance_ip_addr" {
value = aws_instance.server.private_ip
description = "The private IP address of the main server instance."
}

16. Terraform
Benefits out of the box
● Inspect state file
● Dependency graph: Tf knows the order in which resources needs to be created first
● Calculates Additions, updations and deletions
● Parallel Execution
● Allow saving the plan

17. Demo

18. Thank You !
Get in touch with me:
yatharth.sharma@knoldus.com