Added API Gateway module

Author: Emmy-github-webdev

terraform/main.tf

@@ -31,4 +31,22 @@ module "dynamodb" {
   source = "./modules/dynamodb"
   environment  = var.environment
   common_tags  = local.common_tags
+}
+
+# IAM Module
+module "iam" {
+  source = "./modules/iam"
+
+  environment        = var.environment
+  dynamodb_table_arn = module.dynamodb.table_arn
+  common_tags        = local.common_tags
+}
+
+# API Gateway Module
+module "api_gateway" {
+  source = "./modules/api_gateway"
+
+  environment       = var.environment
+  lambda_invoke_arn = module.lambda.function_invoke_arn
+  common_tags       = local.common_tags
 }

terraform/modules/api-gateway/main.tf

@@ -0,0 +1,62 @@
+resource "aws_apigatewayv2_api" "health_api" {
+  name          = "${var.environment}-health-check-api"
+  protocol_type = "HTTP"
+
+  cors_configuration {
+    allow_origins = ["*"]
+    allow_methods = ["GET", "POST", "OPTIONS"]
+    allow_headers = ["*"]
+  }
+
+  tags = var.common_tags
+}
+
+resource "aws_apigatewayv2_integration" "lambda_integration" {
+  api_id           = aws_apigatewayv2_api.health_api.id
+  integration_type = "AWS_PROXY"
+  integration_method = "POST"
+  payload_format_version = "2.0"
+  integration_uri  = var.lambda_invoke_arn
+  depends_on = []
+}
+
+resource "aws_apigatewayv2_route" "health_route_get" {
+  api_id    = aws_apigatewayv2_api.health_api.id
+  route_key = "GET /health"
+  target    = "integrations/${aws_apigatewayv2_integration.lambda_integration.id}"
+}
+
+resource "aws_apigatewayv2_route" "health_route_post" {
+  api_id    = aws_apigatewayv2_api.health_api.id
+  route_key = "POST /health"
+  target    = "integrations/${aws_apigatewayv2_integration.lambda_integration.id}"
+}
+
+resource "aws_apigatewayv2_stage" "default" {
+  api_id      = aws_apigatewayv2_api.health_api.id
+  name        = "$default"
+  auto_deploy = true
+
+  access_log_settings {
+    destination_arn = aws_cloudwatch_log_group.api_gateway_logs.arn
+    format = jsonencode({
+      requestId      = "$context.requestId"
+      ip             = "$context.identity.sourceIp"
+      requestTime    = "$context.requestTime"
+      httpMethod     = "$context.httpMethod"
+      resourcePath   = "$context.resourcePath"
+      status         = "$context.status"
+      protocol       = "$context.protocol"
+      responseLength = "$context.responseLength"
+    })
+  }
+
+  tags = var.common_tags
+}
+
+resource "aws_cloudwatch_log_group" "api_gateway_logs" {
+  name              = "/aws/apigateway/${var.environment}-health-check-api"
+  retention_in_days = 7
+
+  tags = var.common_tags
+}

terraform/modules/api-gateway/outputs.tf

@@ -0,0 +1,14 @@
+output "api_endpoint" {
+  description = "The endpoint URL of the API Gateway"
+  value       = "${aws_apigatewayv2_api.health_api.api_endpoint}/"
+}
+
+output "api_id" {
+  description = "The ID of the API Gateway"
+  value       = aws_apigatewayv2_api.health_api.id
+}
+
+output "execution_arn" {
+  description = "The execution ARN of the API Gateway"
+  value       = aws_apigatewayv2_api.health_api.execution_arn
+}

terraform/modules/api-gateway/variables.tf

@@ -0,0 +1,14 @@
+variable "environment" {
+  description = "Environment name"
+  type        = string
+}
+
+variable "lambda_invoke_arn" {
+  description = "Invoke ARN of the Lambda function"
+  type        = string
+}
+
+variable "common_tags" {
+  description = "Common tags for all resources"
+  type        = map(string)
+}