Merge pull request #170 from tungbq/issue-161

Issue 161: Create lamda function

tutorial/serverless-basic-application/assets/lamda_function.py

@@ -0,0 +1,11 @@
+# import the JSON utility package since we will be working with a JSON object
+import json
+# define the handler function that the Lambda service will use as an entry point
+def lambda_handler(event, context):
+# extract values from the event object we got from the Lambda service
+    name = event['firstName'] +' '+ event['lastName']
+# return a properly formatted JSON object
+    return {
+    'statusCode': 200,
+    'body': json.dumps('Hello from Lambda, ' + name)
+    }

tutorial/serverless-basic-application/lamda.tf

@@ -0,0 +1,68 @@
+// Saving sourcecode to s3
+data "archive_file" "lambda_hello_world" {
+  type = "zip"
+
+  source_dir  = "${path.module}/assets"
+  output_path = "${path.module}/assets/lamda_function.zip"
+}
+
+resource "aws_s3_bucket" "tungbq_lamda_source" {
+  bucket = "tungbq-lamda-source"
+
+  tags = {
+    Name        = "S3 bucket to store lamda source code"
+    Environment = "Dev"
+  }
+}
+
+
+resource "aws_s3_object" "lambda_hello_world" {
+  bucket = aws_s3_bucket.tungbq_lamda_source.id
+
+  key    = "lamda_function.zip"
+  source = data.archive_file.lambda_hello_world.output_path
+
+  etag = filemd5(data.archive_file.lambda_hello_world.output_path)
+}
+
+resource "aws_lambda_function" "hello_world" {
+  function_name = "HelloWorld"
+
+  s3_bucket = aws_s3_bucket.tungbq_lamda_source.id
+  s3_key    = aws_s3_object.lambda_hello_world.key
+
+  runtime = "python3.8"
+  handler = "lamda_function.lambda_handler"
+
+  source_code_hash = data.archive_file.lambda_hello_world.output_base64sha256
+
+  role = aws_iam_role.lambda_exec.arn
+}
+
+resource "aws_cloudwatch_log_group" "hello_world" {
+  name = "/aws/lambda/${aws_lambda_function.hello_world.function_name}"
+
+  retention_in_days = 30
+}
+
+resource "aws_iam_role" "lambda_exec" {
+  name = "serverless_lambda"
+
+  assume_role_policy = jsonencode({
+    Version = "2012-10-17"
+    Statement = [{
+      Action = "sts:AssumeRole"
+      Effect = "Allow"
+      Sid    = ""
+      Principal = {
+        Service = "lambda.amazonaws.com"
+      }
+      }
+    ]
+  })
+}
+
+resource "aws_iam_role_policy_attachment" "lambda_policy" {
+  role       = aws_iam_role.lambda_exec.name
+  policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
+}

tutorial/serverless-basic-application/outputs.tf

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+output "function_name" {
+  description = "Name of the Lambda function."
+
+  value = aws_lambda_function.hello_world.function_name
+}