nixpkgs/modules/services/monitoring/zabbix-agent.nix

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# Zabbix agent daemon.
{ config, pkgs, ... }:
with pkgs.lib;
let
cfg = config.services.zabbixAgent;
stateDir = "/var/run/zabbix";
logDir = "/var/log/zabbix";
pidFile = "${stateDir}/zabbix_agentd.pid";
configFile = pkgs.writeText "zabbix_agentd.conf"
''
Server = ${cfg.server}
LogFile = ${logDir}/zabbix_agentd
PidFile = ${pidFile}
StartAgents = 5
'';
in
{
###### interface
options = {
services.zabbixAgent = {
enable = mkOption {
default = false;
description = ''
Whether to run the Zabbix monitoring agent on this machine.
It will send monitoring data to a Zabbix server.
'';
};
server = mkOption {
default = "127.0.0.1";
description = ''
The IP address or hostname of the Zabbix server to connect to.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
users.extraUsers = singleton
{ name = "zabbix";
uid = config.ids.uids.zabbix;
description = "Zabbix daemon user";
};
jobs.zabbix_agent =
{ #name = "zabbix-agent"; !!! mkIf bug
description = "Zabbix agent daemon";
startOn = "network-interfaces/started";
stopOn = "network-interfaces/stop";
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preStart =
''
mkdir -m 0755 -p ${stateDir} ${logDir}
chown zabbix ${stateDir} ${logDir}
export PATH=${pkgs.nettools}/bin:$PATH
${pkgs.zabbixAgent}/sbin/zabbix_agentd --config ${configFile}
'';
postStop =
''
# !!! this seems to leave processes behind.
#pid=$(cat ${pidFile})
#if test -n "$pid"; then
# kill $pid
#fi
# So instead kill the agent in a brutal fashion.
while ${pkgs.procps}/bin/pkill -u zabbix zabbix_agentd; do true; done
'';
};
};
}