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--- aws:howtouselambdalayer [09/03/2023 13:00] – created - external edit 127.0.0.1
+++ aws:howtouselambdalayer [30/05/2025 15:05] (current) – removed andrew
@@ Line 1: / Line 1: @@
-====== How to use a Lambda Layer ======
-Terraform to deploy a lambda function with a layer, this deploys Boto3 as a layer, a bit strange but I needed the functionality to create an "Additional Checksum" with an s3 copy, this was not included in the version of Boto3 deployed with Lambda/Python.
-lambda.tf
-<code>
-data "archive_file" "lambda-archive" {
-  type        = "zip"
-  source_file = "lambda/src/main.py"
-  output_path = "lambda/packages/lambda_function.zip"
-}
-resource "aws_lambda_function" "lambda-function" {
-  filename         = "lambda/packages/lambda_function.zip"
-  function_name    = "layered-test"
-  role             = aws_iam_role.role_for_lambda.arn
-  handler          = "main.handle"
-  source_code_hash = data.archive_file.lambda-archive.output_base64sha256
-  runtime          = "python3.7"
-  timeout          = 15
-  memory_size      = 128
-  layers           = [aws_lambda_layer_version.boto3_layer.arn]
-}
-resource "aws_lambda_layer_version" "boto3_layer" {
-  filename            = "lambda/packages/boto3_v1.25.2.zip"
-  layer_name          = "boto3_v1.25.2"
-  source_code_hash    = filebase64sha256("lambda/packages/boto3_v1.25.2.zip")
-  compatible_runtimes = ["python3.6", "python3.7"]
-}
-</code>
-iam.tf
-<code>
-resource "aws_iam_role" "role_for_lambda" {
-  name = "role-lambda"
-  path = "/"
-  permissions_boundary = "arn:aws:iam::987612344321:policy/permbound-Developer"
-  assume_role_policy = "${file("assumerolepolicy.json")}"
-  tags = {
-    tag-key = "tag-value"
-    }
-  }
-resource "aws_iam_role_policy_attachment" "lambda_basic_execution_policy_attachement" {
-  role       = aws_iam_role.role_for_lambda.name
-  policy_arn = "arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole"
-}
-</code>
-assumerolepolicy.json
-<code json>
-{
-    "Version": "2012-10-17",
-    "Statement": [
-        {
-            "Sid": "Terraform",
-            "Effect": "Allow",
-            "Action": "lambda:*"
-        }
-    ]
-}
-</code>