How to pass parameters to Nix script from Terraform?

[smulikHakipod]

Hi! Let's say I want to pass PublicIP and other parameters from Terraform to Nix file, how should I do that? I tried using

extra_eval_args = ["--argstr", "some_arg", aws_instance.node.public_ip] or extra_build_args = ["--argstr", "some_arg", aws_instance.node.public_ip]

but none of those are shown in the Nix file as arguments.

What other approach should I use?

Thanks

[adrian-gierakowski]

Let's say I want to pass PublicIP and other parameters from Terraform to Nix file, how should I do that?

which nix file? Do you mean one of these scripts:

• https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/deploy_nixos/nixos-instantiate.sh
• https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/deploy_nixos/nixos-deploy.sh

I tried using

extra_eval_args = ["--argstr", "some_arg", aws_instance.node.public_ip] or

How are you setting these? Would you mind sharing repo with a minimal repro? Thanks!

[smulikHakipod]

Thanks for help @adrian-gierakowski ! In my case I would like to pass a parameter from lets say from https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/examples/hermetic_config/default.tf#L20 to here https://github.com/nix-community/terraform-nixos/blob/646cacb12439ca477c05315a7bfd49e9832bc4e3/examples/hermetic_config/configuration.nix#L35

I hope it makes things more clear. I can make a minimal repo tomorrow. Thanks again!

[smulikHakipod]

@adrian-gierakowski I created a mini repo: I want to pass argument from TF:

https://github.com/smulikHakipod/mini-nix-terraform-/blob/2cdc1645fabb50efbe579b6195dd25dbac00b421/default.tf#L27

To nix config:

https://github.com/smulikHakipod/mini-nix-terraform-/blob/2cdc1645fabb50efbe579b6195dd25dbac00b421/configuration.nix#L38

What is the best way to achieve this?

Thanks!!