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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.vnstat;
in {
options.services.vnstat = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable update of network usage statistics via vnstatd.
'';
};
};
config = mkIf cfg.enable {
users.users.vnstatd = {
isSystemUser = true;
description = "vnstat daemon user";
home = "/var/lib/vnstat";
createHome = true;
};
systemd.services.vnstat = {
description = "vnStat network traffic monitor";
path = [ pkgs.coreutils ];
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
documentation = [
"man:vnstatd(1)"
"man:vnstat(1)"
"man:vnstat.conf(5)"
];
preStart = "chmod 755 /var/lib/vnstat";
serviceConfig = {
ExecStart = "${pkgs.vnstat}/bin/vnstatd -n";
ExecReload = "${pkgs.procps}/bin/kill -HUP $MAINPID";
# Hardening (from upstream example service)
ProtectSystem = "strict";
StateDirectory = "vnstat";
PrivateDevices = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
ProtectHome = true;
ProtectKernelModules = true;
PrivateTmp = true;
MemoryDenyWriteExecute = true;
RestrictRealtime = true;
RestrictNamespaces = true;
User = "vnstatd";
};
};
};
}
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