├── .gitignore
├── dev
    └── main.tf
├── modules
    ├── ec2
    │   ├── instances.tf
    │   └── vars.tf
    └── vpc
    │   ├── networking.tf
    │   └── vars.tf
└── prod
    ├── main.tf
    └── vars.tf


/.gitignore:
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 1 | # Local .terraform directories
 2 | **/.terraform/*
 3 | 
 4 | # .tfstate files
 5 | *.tfstate
 6 | *.tfstate.*
 7 | 
 8 | # Crash log files
 9 | crash.log
10 | 
11 | # Ignore any .tfvars files that are generated automatically for each Terraform run. Most
12 | # .tfvars files are managed as part of configuration and so should be included in
13 | # version control.
14 | #
15 | # example.tfvars
16 | 


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/dev/main.tf:
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 1 | provider "aws" {
 2 |   region = "ap-south-1"
 3 | }
 4 | 
 5 | module "my_vpc" {
 6 |   source      = "../modules/vpc"
 7 |   vpc_cidr    = "192.168.0.0/16"
 8 |   tenancy     = "default"
 9 |   vpc_id      = "${module.my_vpc.vpc_id}"
10 |   subnet_cidr = "192.168.1.0/24"
11 | }
12 | 
13 | module "my_ec2" {
14 |   source        = "../modules/ec2"
15 |   ec2_count     = 1
16 |   ami_id        = "ami-5a8da735"
17 |   instance_type = "t2.micro"
18 |   subnet_id     = "${module.my_vpc.subnet_id}"
19 | }
20 | 


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/modules/ec2/instances.tf:
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 1 | resource "aws_instance" "web" {
 2 |   count         = "${var.ec2_count}"
 3 |   ami           = "${var.ami_id}"
 4 |   instance_type = "${var.instance_type}"
 5 |   subnet_id     = "${var.subnet_id}"
 6 | 
 7 |   tags {
 8 |     Name = "HelloWorld"
 9 |   }
10 | }
11 | 


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/modules/ec2/vars.tf:
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 1 | variable "ec2_count" {
 2 |   default = "1"
 3 | }
 4 | 
 5 | variable "ami_id" {}
 6 | 
 7 | variable "instance_type" {
 8 |   default = "t2.micro"
 9 | }
10 | 
11 | variable "subnet_id" {}
12 | 


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/modules/vpc/networking.tf:
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 1 | resource "aws_vpc" "main" {
 2 |   cidr_block       = "${var.vpc_cidr}"
 3 |   instance_tenancy = "${var.tenancy}"
 4 | 
 5 |   tags {
 6 |     Name = "main"
 7 |   }
 8 | }
 9 | 
10 | resource "aws_subnet" "main" {
11 |   vpc_id     = "${var.vpc_id}"
12 |   cidr_block = "${var.subnet_cidr}"
13 | 
14 |   tags {
15 |     Name = "Main"
16 |   }
17 | }
18 | 
19 | output "vpc_id" {
20 |   value = "${aws_vpc.main.id}"
21 | }
22 | 
23 | output "subnet_id" {
24 |   value = "${aws_subnet.main.id}"
25 | }
26 | 


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/modules/vpc/vars.tf:
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 1 | variable "vpc_cidr" {
 2 |   default = "10.0.0.0/16"
 3 | }
 4 | 
 5 | variable "tenancy" {
 6 |   default = "dedicated"
 7 | }
 8 | 
 9 | variable "vpc_id" {}
10 | 
11 | variable "subnet_cidr" {
12 |   default = "10.0.1.0/24"
13 | }
14 | 


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/prod/main.tf:
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 1 | provider "aws" {
 2 |   region = "ap-south-1"
 3 | }
 4 | 
 5 | module "my_vpc" {
 6 |   source      = "../modules/vpc"
 7 |   vpc_cidr    = "192.168.0.0/16"
 8 |   tenancy     = "default"
 9 |   vpc_id      = "${module.my_vpc.vpc_id}"
10 |   subnet_cidr = "192.168.1.0/24"
11 | }
12 | 
13 | module "my_ec2" {
14 |   source        = "../modules/ec2"
15 |   ec2_count     = 1
16 |   ami_id        = "ami-5a8da735"
17 |   instance_type = "t2.micro"
18 |   subnet_id     = "${module.my_vpc.subnet_id}"
19 | }
20 | 


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/prod/vars.tf:
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1 | 
2 | 


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