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nixpkgs/nixos/tests/amazon-init-shell.nix
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2025-10-09 14:15:47 +02:00

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Nix

# This test verifies that the amazon-init service can treat the `user-data` ec2
# metadata file as a shell script. If amazon-init detects that `user-data` is a
# script (based on the presence of the shebang #! line) it executes it and
# exits.
# Note that other tests verify that amazon-init can treat user-data as a nixos
# configuration expression.
{
lib,
...
}:
{
name = "amazon-init";
meta = with lib.maintainers; {
maintainers = [ urbas ];
};
nodes.machine = {
imports = [
../modules/profiles/headless.nix
../modules/virtualisation/amazon-init.nix
];
services.openssh.enable = true;
system.switch.enable = true;
networking.hostName = "";
environment.etc."ec2-metadata/user-data" = {
text = ''
#!/usr/bin/bash
echo successful > /tmp/evidence
# Emulate running nixos-rebuild switch, just without any building.
# https://github.com/nixos/nixpkgs/blob/4c62505847d88f16df11eff3c81bf9a453a4979e/nixos/modules/virtualisation/amazon-init.nix#L55
/run/current-system/bin/switch-to-configuration test
'';
};
};
testScript = ''
# To wait until amazon-init terminates its run
unnamed.wait_for_unit("amazon-init.service")
unnamed.succeed("grep -q successful /tmp/evidence")
'';
}