I am getting this issue while dong demo-2: Warning: Interpolation-only expressions are deprecated

[kiransharma2016]

I am getting Warning: Interpolation-only expressions are deprecated issue whle implementing the demp-2. It sounds it provisioned the ec2, but can not login. it complaint not finding the private key file.

This is what is in vars file

variable "PATH_TO_PRIVATE_KEY" { default = "mykey" }

There is a file called mykey in the same folder

in instance config file, connection { host = coalesce(self.public_ip, self.private_ip) type = "ssh" user = var.INSTANCE_USERNAME private_key =file(var.PATH_TO_PRIVATE_KEY) }

I also tried connection { host = coalesce(self.public_ip, self.private_ip) type = "ssh" user = var.INSTANCE_USERNAME private_key = "${file(var.PATH_TO_PRIVATE_KEY)}" }

But when I use same ppk and login from putty, it works. so not ppk issue. not sure why it does not find the file.

[kiransharma2016]

Here is debug log

2020-11-23T09:05:57.188-0500 [DEBUG] plugin.terraform.exe: file-provisioner (internal) 2020/11/23 09:05:57 using private key for authentication 2020/11/23 09:05:57 [WARN] Errors while provisioning aws_instance.example with "file", so aborting 2020/11/23 09:05:57 [ERROR] eval: *terraform.EvalApplyPost, err: 1 error occurred:

• Failed to read ssh private key: no key found

2020/11/23 09:05:57 [ERROR] eval: *terraform.EvalSequence, err: Failed to read ssh private key: no key found 2020-11-23T09:05:57.247-0500 [WARN] plugin.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing" 2020-11-23T09:05:57.247-0500 [WARN] plugin.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing" 2020-11-23T09:05:57.247-0500 [WARN] plugin.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing" 2020-11-23T09:05:57.277-0500 [DEBUG] plugin: plugin process exited: path=.terraform/plugins/registry.terraform.io/hashicorp/aws/3.16.0/windows_amd64/terraform-provider-aws_v3.16.0_x5.exe pid=20596 2020-11-23T09:05:57.277-0500 [DEBUG] plugin: plugin exited 2020-11-23T09:05:57.287-0500 [DEBUG] plugin: plugin process exited: path="C:\Program Files\Amazon\AWSCLI\bin\terraform.exe" pid=8060 2020-11-23T09:05:57.287-0500 [DEBUG] plugin: plugin exited 2020-11-23T09:05:57.288-0500 [DEBUG] plugin: plugin process exited: path="C:\Program Files\Amazon\AWSCLI\bin\terraform.exe" pid=9192 2020-11-23T09:05:57.288-0500 [DEBUG] plugin: plugin exited  Error: Failed to read ssh private key: no key found

[wardviaene]

You'll need the SSH key in "OpenSSH format", not PPK format. You can use puttygen to convert from PPK to OpenSSH format.

To fix the deprecation warning you can change: private_key = "${file(var.PATH_TO_PRIVATE_KEY)}" to private_key = file(var.PATH_TO_PRIVATE_KEY)

[kiransharma2016]

Thanks. That worked.

I used this command openssl rsa -in bt_mykeypair.pem -out private.key

Also this worked ${file(var.PATH_TO_PRIVATE_KEY)}"

[kiransharma2016]

Thansk