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Terraform AWS Lambda Deployment scenarios with 'Invalid Lambda Function Configuration' scenarios

👀 Views: 71 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-23
terraform aws lambda HCL

I'm stuck on something that should probably be simple... I'm trying to debug I'm working on a personal project and This might be a silly question, but I'm working with an scenario while deploying an AWS Lambda function using Terraform (v1.3.0). My configuration seems correct, but I'm getting the following behavior message when I apply my changes: `behavior: Invalid Lambda Function Configuration: The Lambda function configuration is invalid.` This behavior appears right after the plan stage, and I want to seem to pinpoint what is wrong. Here's a snippet of my Terraform configuration: ```hcl resource "aws_lambda_function" "my_lambda" { function_name = "my_lambda_function" handler = "index.handler" runtime = "nodejs14.x" role = aws_iam_role.lambda_exec.arn source_code_hash = filebase64sha256("./lambda_function.zip") timeout = 10 memory_size = 128 } resource "aws_iam_role" "lambda_exec" { name = "lambda_exec_role" assume_role_policy = jsonencode({ Version = "2012-10-17" Statement = [{ Action = "sts:AssumeRole" Principal = { Service = "lambda.amazonaws.com" } Effect = "Allow" Sid = "" }] }) } ``` I have double-checked the `source_code_hash` and the IAM role configuration, but everything seems in place. The zipped file for the Lambda function does exist, and I can confirm it contains the `index.js` file with the proper `exports.handler` function. Additionally, when I run `terraform plan`, it shows the expected changes, but then fails during `terraform apply`. Has anyone encountered this scenario before? What could be causing the 'Invalid Lambda Function Configuration' behavior? Any insights on debugging this would be appreciated. I'm working on a web app that needs to handle this. What am I doing wrong? For context: I'm using Hcl on Linux. What's the best practice here? My team is using Hcl for this service. Any suggestions would be helpful. I recently upgraded to Hcl 3.10.