https://github.com/vasuadari/hello-world-terraform

Terraform scripts to deploy vasuadari/hello-world app.
https://github.com/vasuadari/hello-world-terraform

hello-world terraform

Last synced: 18 days ago
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Terraform scripts to deploy vasuadari/hello-world app.

• Host: GitHub
• URL: https://github.com/vasuadari/hello-world-terraform
• Owner: vasuadari
• Created: 2020-03-31T14:52:44.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-09-06T10:42:36.000Z (about 4 years ago)
• Last Synced: 2024-10-09T13:03:00.037Z (29 days ago)
• Topics: hello-world, terraform
• Language: HCL
• Size: 37.1 KB
• Stars: 4
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Terraform for hello-world app

## Objective

Setup hello-world app in a secure network which is served via the aws load-balancer.

## Details on how terraform sets up the infrastructure

### VPC

1. Creates VPC with 10.1.0.0/16 cidr block

2. A route table is created which routes all traffic to internet gateway

3. Two subnets are created with 10.1.1.0/24 and 10.1.4.0/24 cidr block and it

   is associated with previously created route table

4. A NAT gateway is created for private subnets

5. A route table is created which routes all traffic to NAT gateway

6. A private subnet with cidr block 10.1.2.0/24 and associated with previously

   created route table

### EC2

#### Instance

A t2.micro instance is created in a private subnet with a user data which installs

docker and starts the app on port 80. A security group is attached which allows

incoming traffic to public subnets and outgoing to internet.

#### Application Load Balancer

1. Creates an application load balancer with following security groups

   - allows incoming traffic to port 80

   - allows outgoing traffic to private subnet range

2. Creates a target group A with port 80 with healthcheck path

3. Attaches target group A with t2.micro instance in which app is deployed

4. Adds a listener rule to foward the incoming requests to target group A

### Instructions to use terraform

1. Install terraform version 0.12.19 via [brew](https://brew.sh/) or [asdf](https://asdf-vm.com/)

2. Install awscli via [brew](https://brew.sh/)

3. Create an IAM access keys with full access to EC2 and VPC and configure with your awscli client

   Run `aws configure` and set region to ap-south-1

4. Run `terraform init` to initializes all the plugins and modules

5. Run `terraform plan` to check the resources to be created

6. Run `terraform apply` to setup the complete infrastructure and to deploy the application

## References

[Architecture Diagram](docs/architecture.pdf)