Terraform AWS Lambda function not deploying due to VPC configuration issues
This might be a silly question, but I'm working on a project and hit a roadblock. I'm trying to deploy an AWS Lambda function using Terraform that needs to be inside a VPC to access a private RDS database. However, I'm working with the behavior `ResourceConflictException: The function want to be deployed because the VPC configuration is invalid.` I’ve defined the Lambda function and its necessary IAM role, but despite several attempts, the function keeps failing to deploy. Here's a simplified version of my Terraform code: ```hcl resource "aws_vpc" "main" { cidr_block = "10.0.0.0/16" } resource "aws_subnet" "main" { vpc_id = aws_vpc.main.id cidr_block = "10.0.1.0/24" availability_zone = "us-east-1a" } resource "aws_lambda_function" "my_lambda" { function_name = "my_lambda_function" handler = "index.handler" runtime = "nodejs14.x" role = aws_iam_role.lambda_exec.arn filename = "lambda.zip" vpc_config { subnet_ids = [aws_subnet.main.id] security_group_ids = [aws_security_group.lambda_sg.id] } } resource "aws_security_group" "lambda_sg" { vpc_id = aws_vpc.main.id } resource "aws_iam_role" "lambda_exec" { name = "lambda_exec_role" assume_role_policy = jsonencode({ Version = "2012-10-17" Statement = [{ Action = "sts:AssumeRole" Effect = "Allow" Principal = { Service = "lambda.amazonaws.com" } }] }) } ``` I've confirmed that the subnets I’m using for the Lambda function have sufficient IP addresses available and are private. Additionally, the IAM role has the necessary permissions to execute Lambda functions. I suspect it might be related to either the security group configuration or the way the VPC is set up, but I’ve tried various configurations and nothing seems to work. I've also checked the AWS console for any more detailed behavior messages, but it just reiterates that the VPC configuration is invalid. Does anyone have insights on what specific configurations or settings I might be missing? Any help would be greatly appreciated! Thanks in advance! What's the best practice here?