Terraform final deployment - VPC, ALB, React App, API and MongoDB - Lab 45

Part three of Terraform project. In this lab I will add an React App backed with API and MongoDB

Services Covered

Terraform

Lab description

Previousll I created an advanced AWS VPC spanning 2 AZs with both public and private subnets. An internet gateway and NAT gateway was deployed into it. Public and private route tables were established. An application load balancer (ALB) will be installed which will load balance traffic across an auto scaling group (ASG) of Nginx web servers. Security groups will be created and deployed to secure all network traffic between the various components.

Private subnets will host the frontend application and ALB will distribute traffic to them. Application includes bootstrapped React app with API backed with a MongoDB instance. The public subnet will host bastion host for connectivity.

Project structure

├── main.tf
├── modules
│   ├── application
│   │   ├── main.tf
│   │   ├── outputs.tf
│   │   └── vars.tf
│   ├── bastion
│   │   ├── main.tf
│   │   ├── outputs.tf
│   │   └── vars.tf
│   ├── network
│   │   ├── main.tf
│   │   ├── outputs.tf
│   │   └── vars.tf
│   ├── security
│   │   ├── main.tf
│   │   ├── outputs.tf
│   │   └── vars.tf
│   └── storage
│       ├── install.sh
│       ├── main.tf
│       ├── outputs.tf
│       └── vars.tf
├── outputs.tf
├── terraform.tfvars
└── variables.tf├── ec2.userdata
├── main.tf
├── outputs.tf
├── terraform.tfvars
└── variables.tf

Learning Objectives

Create Terraform template to launch resources
Create AWS environment including VPC, subnets, EC2 instance, route table, internet gateway
Provide EC2 userdata from a separate file
Use terraform modules for application, network, bastion, storage and security layers

Lab date

16-11-2021

Prerequisites

AWS account
Terraform installed
KeyPair in EC2 (I called my cloudacademydemo)

Lab steps

Start off with initializing terraform project in your directory
```
terraform init
```
Plan the terraform environment execution by running
```
terraform plan
```
Deploy the resources by running
```
terraform apply
```
When terraform completes there should be 4 instances running

Navigate to the DNS name found in the Load Balancers tab. You should be able to vote on your favorite language. Votes are send by executing a Ajax request to API and logged in the MongoDB database.
Try connecting to the bastion host and jump over to the MongoDB instance. I use PuTTY to connect to the bastion’s public IP and use Allow agent forwarding option to connect to database instance.
Delete all the resources by running:
```
terraform destroy
```

Lab files

Acknowledgements

cloudacademy