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{
outputs = { self }: {
nixosModule = self.nixosModules.naemon;
nixosModules.naemon = { config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.naemon;
naemonConfig = pkgs.runCommand "naemon-config" {
objectsFile = pkgs.writeText "naemon_objects.cfg" cfg.objectDefs;
resourceFile = config.secrets.fullPaths."naemon/resources.cfg";
extraConfig = pkgs.writeText "extra.cfg" cfg.extraConfig;
inherit (cfg) logDir varDir runDir cacheDir;
} ''
substituteAll ${./naemon.cfg} $out
cat $extraConfig >> $out
'';
in
{
# Necessary for situations where flake gets included multiple times
key = builtins.hashString "sha256" (builtins.path { path = self.sourceInfo.outPath; name = "source"; });
options = {
services.naemon = {
enable = mkOption {
default = false;
description = "
Whether to use <link
xlink:href='http://www.naemon.org/'>Naemon</link> to monitor
your system or network.
";
};
objectDefs = mkOption {
type = types.lines;
default = "";
description = "
A list of Naemon object configuration that must define
the hosts, host groups, services and contacts for the
network that you want Naemon to monitor.
";
};
extraResource = mkOption {
type = types.lines;
default = "";
example = ''
# Sets $USER2$ to be the path to event handlers
#$USER2$=/usr/lib/monitoring-plugins/eventhandlers
# Store some usernames and passwords (hidden from the CGIs)
#$USER3$=someuser
#$USER4$=somepassword
'';
description = "
Lines to add to the resource file
# You can define $USERx$ macros in this file, which can in turn be used
# in command definitions in your host config file(s). $USERx$ macros are
# useful for storing sensitive information such as usernames, passwords,
# etc. They are also handy for specifying the path to plugins and
# event handlers - if you decide to move the plugins or event handlers to
# a different directory in the future, you can just update one or two
# $USERx$ macros, instead of modifying a lot of command definitions.
#
# Naemon supports up to 256 $USERx$ macros ($USER1$ through $USER256$)
#
# Resource files may also be used to store configuration directives for
# external data sources like MySQL...
#
";
};
extraConfig = mkOption {
type = types.lines;
default = "";
description = "
Extra config to append to main config
";
};
user = mkOption {
type = types.str;
default = "naemon";
description = "User for naemon";
};
group = mkOption {
type = types.str;
default = "naemon";
description = "Group for naemon";
};
varDir = mkOption {
type = types.path;
default = "/var/lib/naemon";
description = "The directory where naemon stores its data";
};
cacheDir = mkOption {
type = types.path;
default = "/var/cache/naemon";
description = "The directory where naemon stores its cache";
};
runDir = mkOption {
type = types.path;
default = "/run/naemon";
description = "The directory where naemon stores its runtime files";
};
logDir = mkOption {
type = types.path;
default = "/var/log/naemon";
description = "The directory where naemon stores its log files";
};
package = mkOption {
type = types.package;
default = pkgs.naemon.override {
inherit (cfg) varDir cacheDir logDir runDir user group;
};
description = ''
Naemon package to use
'';
};
};
};
config = mkIf cfg.enable {
secrets.keys = {
"naemon/resources.cfg" = {
user = cfg.user;
group = cfg.group;
permissions = "0400";
text = ''
$USER1$=${pkgs.monitoring-plugins}/libexec
${cfg.extraResource}
'';
keyDependencies = [ pkgs.monitoring-plugins ];
};
};
users.users = optionalAttrs (cfg.user == "naemon") {
naemon = {
group = cfg.group;
uid = config.ids.uids.nagios;
extraGroups = [ "keys" ];
};
};
users.groups = optionalAttrs (cfg.user == "naemon") {
naemon = {
gid = config.ids.gids.nagios;
};
};
services.filesWatcher.naemon = {
paths = [ config.secrets.fullPaths."naemon/resources.cfg" ];
};
systemd.services.naemon = {
description = "Naemon monitoring daemon";
path = [ cfg.package ];
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
preStart = "${cfg.package}/bin/naemon -vp ${naemonConfig}";
script = "${cfg.package}/bin/naemon --daemon ${naemonConfig}";
reload = "${pkgs.utillinux}/bin/kill -HUP $MAINPID";
serviceConfig = {
User = cfg.user;
Restart = "always";
RestartSec = 2;
StandardOutput = "journal";
StandardError = "inherit";
PIDFile = "${cfg.runDir}/naemon.pid";
LogsDirectory = assert lib.strings.hasPrefix "/var/log/" cfg.logDir;
lib.strings.removePrefix "/var/log/" cfg.logDir;
CacheDirectory = assert lib.strings.hasPrefix "/var/cache/" cfg.cacheDir;
let unprefixed = lib.strings.removePrefix "/var/cache/" cfg.cacheDir;
in [ unprefixed "${unprefixed}/checkresults" ];
StateDirectory = assert lib.strings.hasPrefix "/var/lib/" cfg.varDir;
lib.strings.removePrefix "/var/lib/" cfg.varDir;
RuntimeDirectory = assert lib.strings.hasPrefix "/run/" cfg.runDir;
lib.strings.removePrefix "/run/" cfg.runDir;
};
};
};
};
};
}
|
