117 lines
2.9 KiB
Nix
117 lines
2.9 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.services.vmagent;
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settingsFormat = pkgs.formats.json { };
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in
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{
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options.services.vmagent = {
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enable = mkEnableOption "vmagent";
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user = mkOption {
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default = "vmagent";
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type = types.str;
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description = ''
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User account under which vmagent runs.
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'';
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};
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group = mkOption {
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type = types.str;
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default = "vmagent";
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description = ''
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Group under which vmagent runs.
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'';
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};
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package = mkOption {
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default = pkgs.vmagent;
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defaultText = "pkgs.vmagent";
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type = types.package;
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description = ''
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vmagent package to use.
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'';
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};
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dataDir = mkOption {
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type = types.str;
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default = "/var/lib/vmagent";
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description = ''
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The directory where vmagent stores its data files.
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'';
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};
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remoteWriteUrl = mkOption {
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default = "http://localhost:8428/api/v1/write";
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type = types.str;
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description = ''
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The remote storage endpoint such as VictoriaMetrics
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'';
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};
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prometheusConfig = mkOption {
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type = lib.types.submodule {
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freeformType = settingsFormat.type;
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};
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# example = ''
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# global:
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# scrape_interval: 5s
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# scrape_configs:
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# - job_name: 'apache'
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# static_configs:
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# - targets: ['apache-exporter:9117']
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# '';
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description = ''
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Config for prometheus style metrics
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'';
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};
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openFirewall = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to open the firewall for the default ports.
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'';
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};
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};
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config = mkIf cfg.enable {
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# Create group if set to default
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users.groups = mkIf (cfg.group == "vmagent") { vmagent = { }; };
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# Create user if set to default
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users.users = mkIf (cfg.user == "vmagent") {
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vmagent = {
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group = cfg.group;
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shell = pkgs.bashInteractive;
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description = "vmagent Daemon user";
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home = cfg.dataDir;
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isSystemUser = true;
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};
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};
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# Open firewall if option is set to do so.
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networking.firewall.allowedTCPPorts = mkIf (cfg.openFirewall) [ 8429 ];
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# The actual service
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systemd.services.vmagent =
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let prometheusConfig = settingsFormat.generate "prometheusConfig.yaml" cfg.prometheusConfig;
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in {
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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description = "vmagent system service";
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serviceConfig = {
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User = cfg.user;
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Group = cfg.group;
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Type = "simple";
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Restart = "on-failure";
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WorkingDirectory = cfg.dataDir;
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ExecStart =
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"${cfg.package}/bin/vmagent -remoteWrite.url=${cfg.remoteWriteUrl} -promscrape.config=${prometheusConfig}";
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};
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};
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systemd.tmpfiles.rules = [ "d '${cfg.dataDir}' 0755 ${cfg.user} ${cfg.group} -" ];
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};
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}
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