Terraform 0.12.13 - Not able to spin AWS instance - amazon-web-services

Question

AWS EC2 instance creation is failing while creating a network interface in the aws_instance section. The configuration is following configuration as defined in Terraform Network Interfaces
Configuration.
On removing the network block the configuration works seamlessly. With network block the following error was logged
"Error: Error launching source instance: Unsupported: The requested configuration is currently not supported. Please check the documentation for supported configurations."
variable "aws_region" {}
variable "aws_access_key" {}
variable "aws_secret_key" {}
variable "vpc_cidr_block" {}
variable "environment" {}
variable "applicationtype" {}
variable "subnet_cidr_block" {}
variable "amiid" {}
variable "instancetype" {}
variable "bucketname" {}
variable "publickey-fe" {}
variable "publickey-be" {}
provider "aws" {
profile = "default"
region = "${var.aws_region}"
access_key = "${var.aws_access_key}"
secret_key = "${var.aws_secret_key}"
}
data "aws_availability_zones" "availability" {
state = "available"
}
resource "aws_vpc" "sitespeed_vpc" {
cidr_block = "${var.vpc_cidr_block}"
instance_tenancy = "dedicated"
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-VPC"
}
}
resource "aws_subnet" "sitespeed_subnet" {
vpc_id = "${aws_vpc.sitespeed_vpc.id}"
cidr_block = "${var.subnet_cidr_block}"
availability_zone = "${data.aws_availability_zones.availability.names[0]}"
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-Subnet"
}
}
resource "aws_network_interface" "sitespeed_frontend_NIC" {
subnet_id = "${aws_subnet.sitespeed_subnet.id}"
private_ips = ["192.168.10.100"]
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-frontend-nic"
}
}
resource "aws_network_interface" "sitespeed_backend_NIC" {
subnet_id = "${aws_subnet.sitespeed_subnet.id}"
private_ips = ["192.168.10.110"]
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-backend-nic"
}
}
resource "aws_key_pair" "sitespeed_front_key" {
key_name = "site_speed_front_key"
public_key = "${var.publickey-fe}"
}
resource "aws_key_pair" "sitespeed_back_key" {
key_name = "site_speed_back_key"
public_key = "${var.publickey-be}"
}
resource "aws_instance" "sitespeed_front" {
ami = "ami-00942d7cd4f3ca5c0"
instance_type = "t2.micro"
key_name = "site_speed_front_key"
availability_zone = "${data.aws_availability_zones.availability.names[0]}"
network_interface {
network_interface_id = "${aws_network_interface.sitespeed_frontend_NIC.id}"
device_index = 0
}
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-frontend-server"
public = "yes"
}
}
resource "aws_instance" "sitespeed_backend" {
ami = "ami-00942d7cd4f3ca5c0"
instance_type = "t2.micro"
key_name = "site_speed_back_key"
network_interface {
network_interface_id = "${aws_network_interface.sitespeed_backend_NIC.id}"
device_index = 0
}
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
Name = "site-speed-backend-server"
public = "No"
}
}
resource "aws_s3_bucket" "b" {
bucket = "${var.bucketname}"
acl = "private"
tags = {
env = "${var.environment}"
application = "${var.applicationtype}"
}
}

Answer 1

The issue was due to the Terraform Version. Following is the updated script that supports Terraform V.0.12.16 to create an EC2 Instance on AWS.
// Variable Definition
variable "aws_region" {}
variable "aws_vpc_cidr_block" {}
variable "aws_subnet_cidr_block" {}
variable "aws_private_ip_fe" {}
variable "aws_Name" {}
variable "aws_Application" {}
variable "aws_ami" {}
variable "aws_instance_type" {}
// Provider Definition
provider "aws" {
version = "~> 2.40"
region = var.aws_region
}
// Adds a VPC
resource "aws_vpc" "aws_ec2_deployment_test-vpc" {
cidr_block = var.aws_vpc_cidr_block
tags = {
Name = join("-", [var.aws_Name, "vpc"])
Application = var.aws_Application
}
}
//Adds a subnet
resource "aws_subnet" "aws_ec2_deployment_test-subnet" {
vpc_id = aws_vpc.aws_ec2_deployment_test-vpc.id
cidr_block = var.aws_subnet_cidr_block
availability_zone = join("", [var.aws_region, "a"])
tags = {
Name = join("-", [var.aws_Name, "subnet"])
Application = var.aws_Application
}
}
//Adds a Network Interface
resource "aws_network_interface" "aws_ec2_deployment_test-fe" {
subnet_id = aws_subnet.aws_ec2_deployment_test-subnet.id
private_ips = [ var.aws_private_ip_fe ]
tags = {
Name = join("-", [var.aws_Name, "network-interface-fe"])
Application = var.aws_Application
}
}
//Adds an EC2 Instance
resource "aws_instance" "aws_ec2_deployment_test-fe"{
ami = var.aws_ami
instance_type = var.aws_instance_type
network_interface {
network_interface_id = aws_network_interface.aws_ec2_deployment_test-fe.id
device_index = 0
}
tags = {
Name = join("-", [var.aws_Name, "fe-ec2"])
Application = var.aws_Application
}
}
// Print Output Values
output "aws_ec2_deployment_test-vpc" {
description = "CIDR Block for the VPC: "
value = aws_vpc.aws_ec2_deployment_test-vpc.cidr_block
}
output "aws_ec2_deployment_test-subnet" {
description = "Subnet Block: "
value = aws_subnet.aws_ec2_deployment_test-subnet.cidr_block
}
output "aws_ec2_deployment_test-private-ip" {
description = "System Private IP: "
value = aws_network_interface.aws_ec2_deployment_test-fe.private_ip
}
output "aws_ec2_deployment_test-EC2-Details" {
description = "EC2 Details: "
value = aws_instance.aws_ec2_deployment_test-fe.public_ip
}
Gist link to the solution