first commit

Author: robertpeteuil

.gitignore

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+# Local .terraform directories
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# tf lock files
+.terraform.lock.hcl
+
+# Crash log files
+crash.log
+
+# Ignore any .tfvars files that are generated automatically for each Terraform run. Most
+# .tfvars files are managed as part of configuration and so should be included in
+# version control.
+#
+# example.tfvars
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negated pattern
+#
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+# example: *tfplan*

README.md

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+# Provision an EC2 instance in AWS
+
+This Terraform configuration provisions an EC2 instance in AWS using Terraform 0.13+ syntax.
+
+## Details
+
+By default, this configuration provisions the latest Ubuntu 18.04 AMI with type t2.micro in the us-west-1 region. The AMI Owner, AMi Search Name, region, and type can all be set as variables. You can also set the name variable to determine the value set for the Name tag.
+
+Note that you need to set environment variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.

main.tf

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+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 3.46.0"
+    }
+  }
+  required_version = ">= 0.13"
+}
+
+# INITIALIZE AWS PROVIDER
+provider "aws" {
+  region = "us-west-2"
+}
+
+# CREATE AWS INSTANCE
+resource "aws_instance" "aws_vm" {
+  ami                    = data.aws_ami.most_recent_ami.id
+  instance_type          = var.instance_type
+  vpc_security_group_ids = [aws_security_group.ssh.id]
+
+  tags = merge({ "Name" = "${var.name_prefix}-instance", "Project" = var.name_prefix }, var.tags)
+}
+
+# FIND MOST RECENT IMAGE
+data "aws_ami" "most_recent_ami" {
+  filter {
+    name   = "name"
+    values = [var.ami_search_name]
+  }
+
+  most_recent = true
+
+  owners = [var.ami_owner]
+}
+
+# CREATE NETWORK SECURITY GROUP ALLOWING SSH
+resource "aws_security_group" "ssh" {
+  name        = "${var.name_prefix}-ssh-sg"
+  description = "${var.name_prefix} Test SG"
+
+  ingress {
+    from_port = 22
+    to_port   = 22
+    protocol  = "tcp"
+
+    cidr_blocks = [var.ssh_cidr]
+  }
+
+  egress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  tags = merge({ "Name" = "${var.name_prefix}-ssh-sg", "Project" = var.name_prefix }, var.tags)
+}

outputs.tf

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+# OUTPUTS
+
+# DISPLAY PUBLIC DNS ADDRESS
+output "public_dns" {
+  description = "Instance DNS Address"
+  value       = aws_instance.aws_vm.public_dns
+}

variables.tf

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+# VARIABLES
+
+variable "name_prefix" {
+  description = "Name prefix to use when naming resources."
+  default     = "demo-mkt-analysis"
+}
+
+variable "instance_type" {
+  description = "type of EC2 instance to provision."
+  default     = "t3.micro" # default
+  # default = "t3.xlarge" # upgrade t2.micro to t3.xlarge = cost increase violation
+}
+
+variable "ssh_cidr" {
+  description = "IP CIDR to allow inbound on port 22."
+  default     = "10.0.0.1/32"
+}
+
+variable "tags" {
+  type    = map(string)
+  default = {}
+}
+
+variable "ami_owner" {
+  description = "Owner of AMI to provision."
+  default     = "099720109477"
+}
+
+variable "ami_search_name" {
+  description = "Search name of AMI to provision."
+  default     = "ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-*"
+}
+