aws-multitier-terraform-automation/main.tf at main · Chaitanya5068/aws-multitier-terraform-automation · GitHub

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locals {
  name_prefix = "${var.project_name}-${var.environment}"

  common_tags = {
    Project     = var.project_name
    Environment = var.environment
    ManagedBy   = "Terraform"
  }
}

module "vpc" {
  source = "./modules/vpc"

  name_prefix          = local.name_prefix
  vpc_cidr             = var.vpc_cidr
  azs                  = var.azs
  public_subnet_cidrs  = var.public_subnet_cidrs
  private_subnet_cidrs = var.private_subnet_cidrs
  enable_nat_gateway   = var.enable_nat_gateway
  tags                 = local.common_tags
}

module "security" {
  source = "./modules/security"

  name_prefix = local.name_prefix
  vpc_id      = module.vpc.vpc_id
  tags        = local.common_tags
}

module "s3" {
  source = "./modules/s3"

  name_prefix      = local.name_prefix
  project_name     = var.project_name
  environment      = var.environment
  bucket_base_name = var.s3_bucket_name
  tags             = local.common_tags
}

module "iam" {
  source = "./modules/iam"

  name_prefix         = local.name_prefix
  app_bucket_name     = module.s3.bucket_name
  backend_bucket_name = var.backend_bucket_name
  environment         = var.environment
  tags                = local.common_tags
}

module "sns" {
  source = "./modules/sns"

  name_prefix        = local.name_prefix
  subscription_email = var.notification_email
  tags               = local.common_tags
}

module "alb" {
  source = "./modules/alb"

  name_prefix = local.name_prefix
  vpc_id      = module.vpc.vpc_id
  subnet_ids  = module.vpc.public_subnet_ids
  sg_id       = module.security.alb_sg
  tags        = local.common_tags
}

module "ec2" {
  source = "./modules/ec2"

  name_prefix         = local.name_prefix
  project_name        = var.project_name
  environment         = var.environment
  aws_region          = var.aws_region
  subnet_ids          = module.vpc.private_subnet_ids
  instance_type       = var.instance_type
  sg_id               = module.security.ec2_sg
  target_group_arn    = module.alb.target_group_arn
  desired_capacity    = var.desired_capacity
  max_size            = var.max_size
  min_size            = var.min_size
  instance_profile    = module.iam.instance_profile
  sns_topic_arn       = module.sns.topic_arn
  app_bucket_name     = module.s3.bucket_name
  backend_bucket_name = var.backend_bucket_name
  tags                = local.common_tags
}

module "lambda" {
  source = "./modules/lambda"

  name_prefix            = local.name_prefix
  project_name           = var.project_name
  environment            = var.environment
  app_bucket_name        = module.s3.bucket_name
  app_bucket_arn         = module.s3.bucket_arn
  autoscaling_group_name = module.ec2.asg_name
  log_retention_days     = var.lambda_log_retention_days
  tags                   = local.common_tags
}

module "cloudwatch" {
  source = "./modules/cloudwatch"

  name_prefix             = local.name_prefix
  autoscaling_group_name  = module.ec2.asg_name
  alb_arn_suffix          = module.alb.alb_arn_suffix
  target_group_arn_suffix = module.alb.target_group_arn_suffix
  sns_topic_arn           = module.sns.topic_arn
  cpu_threshold           = var.cpu_alarm_threshold
  tags                    = local.common_tags

  depends_on = [
    module.ec2,
    module.alb
  ]
}