Problem with S3 Leading Slash in Terraform
S3 accept leading slash "/" and automatically strip them off. When we use it in Terraform as a S3 key it may looks fine until we use it in another object. See example below.
# This bucket is used to store Lambda function and layer
resource "aws_s3_bucket" "deno" {
bucket = var.default_bucket
acl = "private"
tags = var.default_tags
}
# Upload the layer to S3
resource "aws_s3_bucket_object" "deno_func" {
bucket = aws_s3_bucket.deno.id
tags = var.default_tags
# / in front "deno-custom-runtime/function.zip" below creating problem
key = "/deno-custom-runtime/function.zip"
source = "${path.module}/../build/function.zip"
etag = filemd5("${path.module}/../build/function.zip")
}
# Deno Layer
resource "aws_lambda_layer_version" "deno" {
layer_name = "TeknocerdasDenoRuntime"
s3_bucket = aws_s3_bucket.deno.id
s3_key = aws_s3_bucket_object.deno_layer.key
s3_object_version = aws_s3_bucket_object.deno_layer.version_id
compatible_runtimes = ["provided"]
description = "Custom Deno runtime by TeknoCerdas.com"
source_code_hash = filebase64sha256("${path.module}/../build/layer.zip")
}Error: Error creating lambda layer: InvalidParameterValueException: Error occurred while GetObject. S3 Error Code: NoSuchKey. S3 Error Message: The specified key does not exist.
{
RespMetadata: {
StatusCode: 400,
RequestID: "888bed7e-5345-4d5e-ab0e-0d8c683f49b2"
},
Message_: "Error occurred while GetObject. S3 Error Code: NoSuchKey. S3 Error Message: The specified key does not exist.",
Type: "User"
}Solution to S3 Leading Slash in Terraform
The solution is simply remove the leading slash from the key or filename. So instead of writing /deno-custom-runtime/function.zip use deno-custom-runtime/function.zip.
Problem solved. Simple and stupid.
