29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
114 lines
2.9 KiB
Nix
114 lines
2.9 KiB
Nix
# Zabbix server daemon.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.zabbixServer;
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stateDir = "/var/run/zabbix";
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logDir = "/var/log/zabbix";
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libDir = "/var/lib/zabbix";
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pidFile = "${stateDir}/zabbix_server.pid";
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configFile = pkgs.writeText "zabbix_server.conf"
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''
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LogFile = ${logDir}/zabbix_server
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PidFile = ${pidFile}
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${optionalString (cfg.dbServer != "localhost") ''
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DBHost = ${cfg.dbServer}
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''}
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DBName = zabbix
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DBUser = zabbix
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${optionalString (cfg.dbPassword != "") ''
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DBPassword = ${cfg.dbPassword}
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''}
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'';
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useLocalPostgres = cfg.dbServer == "localhost" || cfg.dbServer == "";
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in
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{
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###### interface
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options = {
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services.zabbixServer.enable = mkOption {
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default = false;
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description = ''
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Whether to run the Zabbix server on this machine.
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'';
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};
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services.zabbixServer.dbServer = mkOption {
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default = "localhost";
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description = ''
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Hostname or IP address of the database server.
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Use an empty string ("") to use peer authentication.
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'';
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};
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services.zabbixServer.dbPassword = mkOption {
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default = "";
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description = "Password used to connect to the database server.";
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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services.postgresql.enable = useLocalPostgres;
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users.extraUsers = singleton
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{ name = "zabbix";
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uid = config.ids.uids.zabbix;
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description = "Zabbix daemon user";
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};
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systemd.services."zabbix-server" =
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{ description = "Zabbix Server";
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wantedBy = [ "multi-user.target" ];
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after = optional useLocalPostgres "postgresql.service";
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preStart =
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''
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mkdir -m 0755 -p ${stateDir} ${logDir} ${libDir}
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chown zabbix ${stateDir} ${logDir} ${libDir}
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if ! test -e "${libDir}/db-created"; then
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${pkgs.postgresql}/bin/createuser --no-superuser --no-createdb --no-createrole zabbix || true
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${pkgs.postgresql}/bin/createdb --owner zabbix zabbix || true
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cat ${pkgs.zabbix.server}/share/zabbix/db/schema/postgresql.sql | ${pkgs.su}/bin/su -s "$SHELL" zabbix -c '${pkgs.postgresql}/bin/psql zabbix'
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cat ${pkgs.zabbix.server}/share/zabbix/db/data/images_pgsql.sql | ${pkgs.su}/bin/su -s "$SHELL" zabbix -c '${pkgs.postgresql}/bin/psql zabbix'
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cat ${pkgs.zabbix.server}/share/zabbix/db/data/data.sql | ${pkgs.su}/bin/su -s "$SHELL" zabbix -c '${pkgs.postgresql}/bin/psql zabbix'
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touch "${libDir}/db-created"
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fi
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'';
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path = [ pkgs.nettools ];
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serviceConfig.ExecStart = "@${pkgs.zabbix.server}/sbin/zabbix_server zabbix_server --config ${configFile}";
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serviceConfig.Type = "forking";
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serviceConfig.Restart = "always";
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serviceConfig.RestartSec = 2;
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serviceConfig.PIDFile = pidFile;
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};
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};
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}
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