Merge pull request #171 from tungbq/issue-162

[Issue-162] Link a Serverless Function to a Web App

tutorial/serverless-basic-application/api-gateway.tf

@@ -0,0 +1,61 @@
+# Flow: 
+# New API -> Resource -> Method -> Interation -> Deployment
+
+resource "aws_api_gateway_rest_api" "lambda" {
+  name          = "serverless_lambda_gw"
+}
+
+# Resource
+resource "aws_api_gateway_resource" "resource" {
+  path_part   = "resource"
+  parent_id   = aws_api_gateway_rest_api.lambda.root_resource_id
+  rest_api_id = aws_api_gateway_rest_api.lambda.id
+}
+
+# Method
+resource "aws_api_gateway_method" "method" {
+  rest_api_id   = aws_api_gateway_rest_api.lambda.id
+  resource_id   = aws_api_gateway_resource.resource.id
+  http_method   = "POST"
+  authorization = "NONE"
+}
+
+# Integration
+resource "aws_api_gateway_integration" "integration" {
+  rest_api_id             = aws_api_gateway_rest_api.lambda.id
+  resource_id             = aws_api_gateway_resource.resource.id
+  http_method             = aws_api_gateway_method.method.http_method
+  integration_http_method = "POST"
+  type                    = "AWS_PROXY"
+  uri                     = aws_lambda_function.hello_world.invoke_arn
+}
+
+# Deployment
+resource "aws_api_gateway_deployment" "example" {
+  rest_api_id = aws_api_gateway_rest_api.lambda.id
+
+  triggers = {
+    redeployment = sha1(jsonencode([
+      aws_api_gateway_resource.resource.id,
+      aws_api_gateway_method.method.id,
+      aws_api_gateway_integration.integration.id,
+    ]))
+  }
+
+  lifecycle {
+    create_before_destroy = true
+  }
+}
+
+# Stage
+resource "aws_api_gateway_stage" "lambda" {
+  rest_api_id    = aws_api_gateway_rest_api.lambda.id
+  deployment_id = aws_api_gateway_deployment.example.id
+  stage_name            = "serverless_lambda_stage"
+
+  # Temporarity disable logging. TODO: work on it later
+  # access_log_settings { ... }
+}
+
+# Logging
+# Temporarity disable logging. TODO: work on it later

tutorial/serverless-basic-application/outputs.tf

@@ -3,3 +3,9 @@ output "function_name" {
 
   value = aws_lambda_function.hello_world.function_name
 }
+
+output "base_url" {
+  description = "Base URL for API Gateway stage."
+
+  value = aws_api_gateway_stage.lambda.invoke_url
+}