Can't use newer AWS instances

[steve-chavez]

Problem

Specifying AWS instances like the t4g series fail on NixOps.

Proposal 1

Update NixOps. Not sure if this will solve it as NixOps status is unclear NixOS/nixops#1574.

Proposal 2

Switch to terranix?

Proposal 3

Use plain terraform?

[roberth]

Specifying AWS instances like the t4g series fail on NixOps.

This should work, as non-x86_64 instance support was added in NixOS/nixops-aws#159.
You could open an issue there.
What's the error?

[steve-chavez]

@roberth Thanks for the feedback!

We're using an old nixpkgs here, I don't think we have that change

postgrest-benchmark/shell.nix

Lines 2 to 6 in 262be48

	nixpkgs = builtins.fetchTarball {
	name = "nixos-20.03";
	url = "https://github.com/nixos/nixpkgs/archive/7bc3a08d3a4c700b53a3b27f5acd149f24b931ec.tar.gz";
	sha256 = "1kiz37052zsgvw7a378zg08mpbi1wk8dkgm5j6dy0x4mxvcg8ws3";
	};

I'll try and upgrade NixOps

[roberth]

I see. Currently I'm fixing the build in Nixpkgs.
Nixpkgs 3f2deb9e98 is a somewhat recent one that does build.

[roberth]

Please try with NixOS/nixpkgs#292099

The previous versions had a bug in AMI lookup.

[steve-chavez]

@roberth Sorry for the late reply. Just got some time to try the migration.

I've upgraded to nixpkgs latest (#3), but I'm getting an error:

$ nixops create deploy.nix -d postgrest-bench
usage: nixops [-h] [--version] [--pdb] operation ...
nixops: error: unrecognized arguments: deploy.nix

Checking man nixops and the 2.0 release notes I don't see how to use the create command now. 🤔

[steve-chavez]

Ah, nixops create does provide a hint:

ValueError: Neither flake.nix nor nixops.nix exists in /home/stevechavez/Projects/postgrest-benchmark