Running Terraform in AWS CodeBuild - deploying lambda

Question

I am trying to deploy a lambda function using Terraform running in AWS CodeBuild. I am able to deploy the lambda zip file from an S3 bucket but not when my buildspec file does the build first because I am doing Terraform apply in the POST BUILD phase - before the zip gets uploaded to S3. Is there a way to do the build and then deploy the zip using Terraform?

Answer 1

You shouldn't need to upload the zip to s3 first, add the zip location as the filename in terraform. I usually copy all assets into a folder called.assets as part of the build process then add it as the filename in the terraform. Like the below

resource "aws_lambda_function" "lambda_function" {
  ....
  filename                       = ".assets/my-module/lambda.zip"
  source_code_hash               = filebase64sha256(".assets/my-module/lambda.zip")
  ...
}