commit 921a66edc47a690cf989ff79f41d553fdd5c96ea · pyrox.dev/nixpkgs

nixos/modules/module-list.nix

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         ./services/monitoring/kapacitor.nix

     

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         ./services/monitoring/loki.nix

     

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         ./services/monitoring/longview.nix

     

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         ./services/monitoring/mackerel-agent.nix

     

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         ./services/monitoring/monit.nix

     

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         ./services/monitoring/munin.nix

     

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         ./services/monitoring/nagios.nix

+111

nixos/modules/services/monitoring/mackerel-agent.nix

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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.mackerel-agent;

     

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         settingsFmt = pkgs.formats.toml {};

     

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       in {

     

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         options.services.mackerel-agent = {

     

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           enable = mkEnableOption "mackerel.io agent";

     

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           # the upstream package runs as root, but doesn't seem to be strictly

     

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           # necessary for basic functionality

     

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           runAsRoot = mkEnableOption "Whether to run as root.";

     

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           autoRetirement = mkEnableOption ''

     

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             Whether to automatically retire the host upon OS shutdown.

     

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           '';

     

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           apiKeyFile = mkOption {

     

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             type = types.path;

     

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             default = "";

     

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             example = "/run/keys/mackerel-api-key";

     

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             description = ''

     

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               Path to file containing the Mackerel API key. The file should contain a

     

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               single line of the following form:

     

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               <literallayout>apikey = "EXAMPLE_API_KEY"</literallayout>

     

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             '';

     

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           };

     

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           settings = mkOption {

     

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             description = ''

     

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               Options for mackerel-agent.conf.

     

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               Documentation:

     

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               <link xlink:href="https://mackerel.io/docs/entry/spec/agent"/>

     

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             '';

     

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             default = {};

     

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             example = {

     

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               verbose = false;

     

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               silent = false;

     

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             };

     

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             type = types.submodule {

     

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               freeformType = settingsFmt.type;

     

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               options.host_status = {

     

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                 on_start = mkOption {

     

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                   type = types.enum [ "working" "standby" "maintenance" "poweroff" ];

     

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                   description = "Host status after agent startup.";

     

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                   default = "working";

     

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                 };

     

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                 on_stop = mkOption {

     

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                   type = types.enum [ "working" "standby" "maintenance" "poweroff" ];

     

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                   description = "Host status after agent shutdown.";

     

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                   default = "poweroff";

     

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                 };

     

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               };

     

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               options.diagnostic =

     

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                 mkEnableOption "Collect memory usage for the agent itself";

     

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             };

     

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           };

     

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         };

     

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         config = mkIf cfg.enable {

     

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           environment.systemPackages = with pkgs; [ mackerel-agent ];

     

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           environment.etc = {

     

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             "mackerel-agent/mackerel-agent.conf".source =

     

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               settingsFmt.generate "mackerel-agent.conf" cfg.settings;

     

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             "mackerel-agent/conf.d/api-key.conf".source = cfg.apiKeyFile;

     

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           };

     

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           services.mackerel-agent.settings = {

     

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             root = mkDefault "/var/lib/mackerel-agent";

     

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             pidfile = mkDefault "/run/mackerel-agent/mackerel-agent.pid";

     

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             # conf.d stores the symlink to cfg.apiKeyFile

     

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             include = mkDefault "/etc/mackerel-agent/conf.d/*.conf";

     

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           };

     

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           # upstream service file in https://git.io/JUt4Q

     

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           systemd.services.mackerel-agent = {

     

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             description = "mackerel.io agent";

     

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             after = [ "network-online.target" "nss-lookup.target" ];

     

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             wantedBy = [ "multi-user.target" ];

     

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             environment = {

     

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               MACKEREL_PLUGIN_WORKDIR = mkDefault "%C/mackerel-agent";

     

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             };

     

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             serviceConfig = {

     

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               DynamicUser = !cfg.runAsRoot;

     

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               PrivateTmp = mkDefault true;

     

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               CacheDirectory = "mackerel-agent";

     

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               ConfigurationDirectory = "mackerel-agent";

     

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               RuntimeDirectory = "mackerel-agent";

     

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               StateDirectory = "mackerel-agent";

     

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               ExecStart = "${pkgs.mackerel-agent}/bin/mackerel-agent supervise";

     

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               ExecStopPost = mkIf cfg.autoRetirement "${pkg.mackerel-agent}/bin/mackerel-agent retire -force";

     

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               ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";

     

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               LimitNOFILE = mkDefault 65536;

     

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               LimitNPROC = mkDefault 65536;

     

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             };

     

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             restartTriggers = [

     

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               config.environment.etc."mackerel-agent/mackerel-agent.conf".source

     

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             ];

     

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           };

     

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         };

     

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       }