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{config, lib,...}:
let
cfg = config.addons.remote_builder;
in
{
options.addons.remote_builder = {
enable = lib.mkEnableOption "Enable remote builder support";
allowedKeyFiles = lib.mkOption {
default = [];
example = [../secrets/example.pub];
description = "Public key files that are allowed on the remote builder";
};
allowedKeys = lib.mkOption {
default = [];
example = ["ssh-ed25519 ... user@example.com"];
description = "Public keys that are allowed on the remote builder";
};
emulatedSystems = lib.mkOption {
default = [];
example = ["aarch64-linux"]; # TODO: This probably has a nice type that could be used
description = "Allow the remote builder to emultate builds for certain architectures";
};
openFirewall = lib.mkEnableOption "Forces the ssh port open for the remote builder";
};
config = lib.mkIf cfg.enable (lib.mkMerge [
{
users.users.remotebuild = {
isSystemUser = true;
group = "remotebuild";
useDefaultShell = true;
# Add keys to remotebuild user.
openssh.authorizedKeys = {
keyFiles = cfg.allowedKeyFiles;
keys = cfg.allowedKeys;
};
};
users.groups.remotebuild = {};
nix = {
nrBuildUsers = 64;
settings = {
trusted-users = [ "remotebuild" ];
min-free = 10 * 1024 * 1024;
max-free = 200 * 1024 * 1024;
max-jobs = "auto";
cores = 8;
};
};
boot.binfmt.emulatedSystems = cfg.emulatedSystems;
# TODO: Make a good default module for ssh.
services.openssh = {
enable = true;
settings.AllowUsers = ["remotebuild"];
};
}
# Open firewall for ssh if not open already, not really recommended unless the server is meant to be public.
(lib.mkIf cfg.openFirewall {
services.openssh.openFirewall = lib.mkForce true;
})
]);
}
|
