# 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 = 1 ${config.services.zabbixAgent.extraConfig} ''; 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. ''; }; extraConfig = mkOption { default = ""; description = '' Configuration that is injected verbatim into the configuration file. ''; }; }; }; ###### 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"; description = "Zabbix agent daemon"; startOn = "ip-up"; stopOn = "stopping network-interfaces"; path = [ pkgs.zabbix.agent ]; preStart = '' mkdir -m 0755 -p ${stateDir} ${logDir} chown zabbix ${stateDir} ${logDir} ''; # Zabbix doesn't have an option not to daemonize, and doesn't # daemonize in a way that allows Upstart to track it. So to # make sure that we notice when it goes down, we start Zabbix # with an open connection to a fifo, with a `cat' on the other # side. If Zabbix dies, then `cat' will exit as well, so we # just monitor `cat'. script = '' export PATH=${pkgs.nettools}/bin:$PATH rm -f ${stateDir}/dummy2 mkfifo ${stateDir}/dummy2 cat ${stateDir}/dummy2 & pid=$! zabbix_agentd --config ${configFile} 100>${stateDir}/dummy2 wait "$pid" ''; postStop = '' pid=$(cat ${pidFile} 2> /dev/null || true) (test -n "$pid" && kill "$pid") || true # Wait until they're really gone. while ${pkgs.procps}/bin/pgrep -u zabbix zabbix_agentd > /dev/null; do sleep 1; done ''; }; environment.systemPackages = [ pkgs.zabbix.agent ]; }; }