restic-alarm/flake.nix

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{
description = "restic-alarm";
inputs = {
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cargo2nix = {
url = "github:cargo2nix/cargo2nix/release-0.11.0";
inputs.nixpkgs.follows = "nixpkgs";
};
flake-utils.follows = "cargo2nix/flake-utils";
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
};
outputs = { self, nixpkgs, cargo2nix, flake-utils }:
flake-utils.lib.eachDefaultSystem (system:
let
pkgs = import nixpkgs {
inherit system;
overlays = [cargo2nix.overlays.default];
};
rustPkgs = pkgs.rustBuilder.makePackageSet {
rustVersion = "1.75.0";
packageFun = import ./Cargo.nix;
};
in rec {
packages = {
restic-alarm = (rustPkgs.workspace.restic-alarm {});
default = packages.restic-alarm;
};
}
) // rec {
nixosModules.restic-alarm = { config, lib, pkgs, ... }:
with lib;
let
cfg = config.custom.restic-alarm;
in
{
options.custom.restic-alarm = {
enable = mkEnableOption (lib.mdDoc "restic-alarm: send alarms for inactive backups");
env_file = mkOption {
type = types.path;
description = lib.mdDoc
"The file containing the environment variables to pass to restic-alarm, for e.g. S3 access keys";
};
};
config = mkIf cfg.enable {
systemd.services.restic-alarm =
let
pkg = self.packages.${pkgs.system}.default;
in {
description = "restic-alarm: send alarms for inactive backups";
after = [ "network.target" "network-online.target" ];
wants = [ "network.target" "network-online.target" ];
wantedBy = [ "multi-user.target" ];
restartTriggers = [ cfg.env_file ];
serviceConfig = {
ExecStart = "${pkg}/bin/restic-alarm";
DynamicUser = true;
EnvironmentFile = "${cfg.env_file}";
};
};
systemd.timers.restic-alarm = {
partOf = [ "restic-alarm.service" ];
wantedBy = [ "timers.target" ];
after = [ "network-online.target" ];
timerConfig = {
Unit = "restic-alarm.service";
Persistent = true;
# every 6 hours
OnCalendar = "*-*-* 00/6:00:00";
RandomizedDelaySec = "1h";
FixedRandomDelay = true;
};
};
};
};
nixosModules.default = nixosModules.restic-alarm;
};
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}