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|
{
config,
lib,
pkgs,
...
}:
let
cfg = config.services.tickwatch;
forEachMonitor =
f:
lib.mapAttrs' (name: cfg: {
name = "tickwatch-${name}";
value = f cfg;
}) cfg.monitors;
monitor.options = {
enable = lib.mkOption {
type = lib.types.bool;
default = true;
description = "Whether to enable this monitor.";
};
monitor = lib.mkOption {
type = lib.types.str;
example = "ping";
description = "Type of this monitor.";
};
target = lib.mkOption {
type = lib.types.str;
example = "6/example.net";
description = "Target of this monitor.";
};
settings = lib.mkOption {
type =
with lib.types;
attrsOf (oneOf [
str
int
bool
]);
example = {
timestamp = "none";
range = "0:100";
};
description = "Settings for this monitor.";
};
logFile = lib.mkOption {
type = lib.types.str;
default = "";
description = ''
Path to output log file for this monitor.
Must be writable by this monitor's user.
Leave empty to log to the service's journald.
'';
};
user = lib.mkOption {
type = lib.types.str;
default = "";
description = ''
User as which to run this monitor.
Leave empty to use a restricted dynamically-allocated user.
'';
};
group = lib.mkOption {
type = lib.types.str;
default = "";
description = ''
Group as which to run this monitor.
Leave empty to use a restricted dynamically-allocated group.
'';
};
};
in
{
meta = {
maintainers = with lib.maintainers; [ euxane ];
};
options.services.tickwatch = {
package = lib.mkPackageOption pkgs "tickwatch" { };
monitors = lib.mkOption {
type = with lib.types; attrsOf (submodule monitor);
default = { };
description = "Configuration for tickwatch monitors.";
};
};
config = lib.mkIf (cfg.monitors != { }) {
systemd.services = forEachMonitor (monCfg: {
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
script = ''
${lib.getExe cfg.package} ${
lib.escapeShellArgs (
(lib.cli.toGNUCommandLine {
optionValueSeparator = "=";
} monCfg.settings)
++ [
monCfg.monitor
monCfg.target
]
)
} ${lib.optionalString (monCfg.logFile != "") ">> ${monCfg.logFile}"}
'';
serviceConfig =
{
Restart = "on-failure";
RestartSec = 30;
# for ping monitor
CapabilityBoundingSet = [ "CAP_NET_RAW" ];
AmbientCapabilities = [ "CAP_NET_RAW" ];
PrivateNetwork = false;
# service hardening
PrivateTmp = true;
PrivateDevices = true;
ProtectKernelTunables = true;
ProtectControlGroups = true;
RestrictSUIDSGID = true;
ProtectKernelModules = true;
SystemCallArchitectures = "native";
PrivateMounts = true;
LockPersonality = true;
ProtectHostname = true;
RestrictRealtime = true;
ProtectSystem = "strict";
ProtectHome = true;
NoNewPrivileges = true;
RestrictAddressFamilies = [
"AF_INET"
"AF_INET6"
];
MemoryDenyWriteExecute = true;
PrivateUsers = false;
SystemCallErrorNumber = "EPERM";
SystemCallFilter = [ "@system-service" ];
ProtectKernelLogs = true;
DevicePolicy = "closed";
ProtectClock = true;
ProtectProc = "noaccess";
ProcSubset = "pid";
RestrictNamespaces = true;
RemoveIPC = true;
UMask = "0077";
}
// (
if (monCfg.user != "" || monCfg.group != "") then
{
User = monCfg.user;
Group = monCfg.group;
}
else
{
DynamicUser = true;
}
);
});
};
}
|