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|
{ config, lib, pkgs, ... }:
let
cfg = config.services.zabbixAgent;
inherit (lib) mkDefault mkEnableOption mkIf mkMerge mkOption;
inherit (lib) attrValues concatMapStringsSep literalExample optionalString types;
inherit (lib.generators) toKeyValue;
user = "zabbix-agent";
group = "zabbix-agent";
moduleEnv = pkgs.symlinkJoin {
name = "zabbix-agent-module-env";
paths = attrValues cfg.modules;
};
configFile = pkgs.writeText "zabbix_agent.conf" (toKeyValue { listsAsDuplicateKeys = true; } cfg.settings);
in
{
imports = [
(lib.mkRemovedOptionModule [ "services" "zabbixAgent" "extraConfig" ] "Use services.zabbixAgent.settings instead.")
];
# interface
options = {
services.zabbixAgent = {
enable = mkEnableOption "the Zabbix Agent";
package = mkOption {
type = types.package;
default = pkgs.zabbix.agent;
defaultText = "pkgs.zabbix.agent";
description = "The Zabbix package to use.";
};
extraPackages = mkOption {
type = types.listOf types.package;
default = with pkgs; [ nettools ];
defaultText = "[ nettools ]";
example = "[ nettools mysql ]";
description = ''
Packages to be added to the Zabbix <envar>PATH</envar>.
Typically used to add executables for scripts, but can be anything.
'';
};
modules = mkOption {
type = types.attrsOf types.package;
description = "A set of modules to load.";
default = {};
example = literalExample ''
{
"dummy.so" = pkgs.stdenv.mkDerivation {
name = "zabbix-dummy-module-''${cfg.package.version}";
src = cfg.package.src;
buildInputs = [ cfg.package ];
sourceRoot = "zabbix-''${cfg.package.version}/src/modules/dummy";
installPhase = '''
mkdir -p $out/lib
cp dummy.so $out/lib/
''';
};
}
'';
};
server = mkOption {
type = types.str;
description = ''
The IP address or hostname of the Zabbix server to connect to.
'';
};
listen = {
ip = mkOption {
type = types.str;
default = "0.0.0.0";
description = ''
List of comma delimited IP addresses that the agent should listen on.
'';
};
port = mkOption {
type = types.port;
default = 10050;
description = ''
Agent will listen on this port for connections from the server.
'';
};
};
openFirewall = mkOption {
type = types.bool;
default = false;
description = ''
Open ports in the firewall for the Zabbix Agent.
'';
};
settings = mkOption {
type = with types; attrsOf (oneOf [ int str (listOf str) ]);
default = {};
description = ''
Zabbix Agent configuration. Refer to
<link xlink:href="https://www.zabbix.com/documentation/current/manual/appendix/config/zabbix_agentd"/>
for details on supported values.
'';
example = {
Hostname = "example.org";
DebugLevel = 4;
};
};
};
};
# implementation
config = mkIf cfg.enable {
services.zabbixAgent.settings = mkMerge [
{
LogType = "console";
Server = cfg.server;
ListenPort = cfg.listen.port;
}
(mkIf (cfg.modules != {}) {
LoadModule = builtins.attrNames cfg.modules;
LoadModulePath = "${moduleEnv}/lib";
})
# the default value for "ListenIP" is 0.0.0.0 but zabbix agent 2 cannot accept configuration files which
# explicitly set "ListenIP" to the default value...
(mkIf (cfg.listen.ip != "0.0.0.0") { ListenIP = cfg.listen.ip; })
];
networking.firewall = mkIf cfg.openFirewall {
allowedTCPPorts = [ cfg.listen.port ];
};
users.users.${user} = {
description = "Zabbix Agent daemon user";
inherit group;
isSystemUser = true;
};
users.groups.${group} = { };
systemd.services.zabbix-agent = {
description = "Zabbix Agent";
wantedBy = [ "multi-user.target" ];
# https://www.zabbix.com/documentation/current/manual/config/items/userparameters
# > User parameters are commands executed by Zabbix agent.
# > /bin/sh is used as a command line interpreter under UNIX operating systems.
path = with pkgs; [ bash "/run/wrappers" ] ++ cfg.extraPackages;
serviceConfig = {
ExecStart = "@${cfg.package}/sbin/zabbix_agentd zabbix_agentd -f --config ${configFile}";
Restart = "always";
RestartSec = 2;
User = user;
Group = group;
PrivateTmp = true;
};
};
};
}
|