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main.tf
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main.tf
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################## Create VPC ##################
module "vpc" {
source = "shamimice03/vpc/aws"
version = "1.0.1"
vpc_name = "efs_vpc"
cidr = "192.168.0.0/16"
azs = ["ap-northeast-1a", "ap-northeast-1c"]
public_subnet_cidr = ["192.168.0.0/20", "192.168.16.0/20"]
enable_dns_hostnames = true
enable_dns_support = true
enable_single_nat_gateway = false
tags = {
"Team" = "platform-team"
"Env" = "efs-test"
}
}
################## Local Variables ##################
locals {
public_subnets = module.vpc.public_subnet_id
vpc_id = module.vpc.vpc_id
file_system_id = aws_efs_file_system.file_system_1.id
}
################## Create Security Group for Public Instances ##################
resource "aws_security_group" "instance_sg" {
name = "allow_public_access"
description = "Allow Traffic from Anywhere"
vpc_id = local.vpc_id
dynamic "ingress" {
for_each = var.public_instance_sg_ports
content {
from_port = ingress.value["port"]
to_port = ingress.value["port"]
protocol = ingress.value["protocol"]
cidr_blocks = ["0.0.0.0/0"]
}
}
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
tags = {
"Name" = "instance_sg"
}
}
################## Create Security Group for Private Instances ##################
resource "aws_security_group" "efs_sg" {
name = "allow_from_public_instances"
description = "Allow traffice from public instance sg only"
vpc_id = local.vpc_id
dynamic "ingress" {
for_each = var.efs_sg_ports
content {
from_port = ingress.value["port"]
to_port = ingress.value["port"]
protocol = ingress.value["protocol"]
security_groups = [aws_security_group.instance_sg.id]
}
}
egress {
from_port = 0
to_port = 0
protocol = "-1"
security_groups = [aws_security_group.instance_sg.id]
}
tags = {
"Name" = "efs_sg"
}
}
################## Create EFS File system ################
resource "aws_efs_file_system" "file_system_1" {
creation_token = "efs-test"
performance_mode = "generalPurpose"
throughput_mode = "bursting"
lifecycle_policy {
transition_to_ia = "AFTER_30_DAYS"
}
tags = {
Name = "efs-test"
}
}
################## Create EFS mount targets ################
resource "aws_efs_mount_target" "mount_targets" {
count = 2
file_system_id = aws_efs_file_system.file_system_1.id
subnet_id = local.public_subnets[count.index]
security_groups = [aws_security_group.efs_sg.id]
}
################## Generating Script for Mounting EFS ##################
resource "null_resource" "generate_efs_mount_script" {
provisioner "local-exec" {
command = templatefile("efs_mount.tpl", {
efs_mount_point = var.efs_mount_point
file_system_id = local.file_system_id
})
interpreter = [
"bash",
"-c"
]
}
}
################## SSH key generation ##################
resource "tls_private_key" "ssh" {
algorithm = "RSA"
rsa_bits = 4096
}
################## Extracting private key ##################
resource "local_file" "private_key" {
content = tls_private_key.ssh.private_key_pem
filename = var.private_key_location
file_permission = "0400"
}
################## Create AWS key pair ##################
resource "aws_key_pair" "aws_ec2_access_key" {
key_name_prefix = var.key_name
public_key = tls_private_key.ssh.public_key_openssh
}
################## Create AWS EC2 Instance on Public Subnet ################
resource "aws_instance" "public_hosts" {
count = var.instance_count
ami = data.aws_ami.amazon_linux_ami.id
instance_type = var.instance_type
key_name = aws_key_pair.aws_ec2_access_key.id
vpc_security_group_ids = [aws_security_group.instance_sg.id]
subnet_id = local.public_subnets[count.index]
tags = {
"Name" = "public-instance-${count.index + 1}"
}
depends_on = [
null_resource.generate_efs_mount_script,
aws_efs_mount_target.mount_targets
]
provisioner "file" {
source = "efs_mount.sh"
destination = "efs_mount.sh"
}
connection {
type = "ssh"
host = self.public_ip
user = "ec2-user"
private_key = file(var.private_key_location) # Location of the Private Key
timeout = "4m"
}
provisioner "remote-exec" {
inline = [
"bash efs_mount.sh",
]
}
}
################## Clean Up Existing Script ##################
resource "null_resource" "clean_up" {
provisioner "local-exec" {
when = destroy
command = "rm -rf efs_mount.sh"
}
}