Transferring a zip to ec2 via local ssh key - windows

Question

Using below code to zip a directory (works) and transfer it to the ec2 host using ssh.
data "archive_file" "scripts" {
type = "zip"
source_dir = "${path.module}/files/app"
output_path = "${path.module}/files/app.zip"
}
resource "null_resource" "upload" {
provisioner "file" {
source = data.archive_file.scripts.output_path
destination = "/home/${var.ec2_user}/${data.archive_file.scripts.output_path}"
connection {
type = "ssh"
user = var.ec2_user
private_key = file("C:/Users/myuser/.ssh/id_rsa.ppk")
host = var.hostname
}
}
}
However I get the following error:
Error: Failed to read ssh private key: no key found
How do I use a local ssh key to transfer the zip to the remote host?
The files are small, should I be using provisioner?
Thanks

Answer 1

Error: Failed to read ssh private key: no key found
That error means that no private key was found in the file specified.
In the following line of your example, you are specifying a private key in Putty format.
private_key = file("C:/Users/myuser/.ssh/id_rsa.ppk")
Terraform expects private keys to be RSA or ECDSA PEM files. Your SSH server might only support RSA. Newer SSH servers usually support both RSA and ECDSA.
If you created your private key with OpenSSL, then the private key filename defaults to id_rsa. If that file exists, change your Terraform to:
private_key = file("C:/Users/myuser/.ssh/id_rsa")