119 lines
3.2 KiB
Nix
119 lines
3.2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.longview;
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pidFile = "/run/longview.pid";
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apacheConf = optionalString (cfg.apacheStatusUrl != "") ''
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location ${cfg.apacheStatusUrl}?auto
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'';
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mysqlConf = optionalString (cfg.mysqlUser != "") ''
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username ${cfg.mysqlUser}
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password ${cfg.mysqlPassword}
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'';
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nginxConf = optionalString (cfg.nginxStatusUrl != "") ''
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location ${cfg.nginxStatusUrl}
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'';
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in
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{
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options = {
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services.longview = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, system metrics will be sent to Linode LongView.
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'';
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};
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apiKey = mkOption {
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type = types.str;
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example = "01234567-89AB-CDEF-0123456789ABCDEF";
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description = ''
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Longview API key. To get this, look in Longview settings which
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are found at https://manager.linode.com/longview/.
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'';
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};
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apacheStatusUrl = mkOption {
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type = types.str;
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default = "";
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example = "http://127.0.0.1/server-status";
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description = ''
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The Apache status page URL. If provided, Longview will
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gather statistics from this location. This requires Apache
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mod_status to be loaded and enabled.
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'';
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};
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nginxStatusUrl = mkOption {
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type = types.str;
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default = "";
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example = "http://127.0.0.1/nginx_status";
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description = ''
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The Nginx status page URL. Longview will gather statistics
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from this URL. This requires the Nginx stub_status module to
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be enabled and configured at the given location.
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'';
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};
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mysqlUser = mkOption {
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type = types.str;
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default = "";
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description = ''
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The user for connecting to the MySQL database. If provided,
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Longview will connect to MySQL and collect statistics about
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queries, etc. This user does not need to have been granted
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any extra privileges.
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'';
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};
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mysqlPassword = mkOption {
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type = types.str;
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description = ''
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The password corresponding to mysqlUser. Warning: this is
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stored in cleartext in the Nix store!
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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systemd.services.longview =
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{ description = "Longview Metrics Collection";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig.Type = "forking";
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serviceConfig.ExecStop = "-${pkgs.coreutils}/bin/kill -TERM $MAINPID";
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serviceConfig.ExecReload = "-${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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serviceConfig.PIDFile = pidFile;
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serviceConfig.ExecStart = "${pkgs.longview}/bin/longview";
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};
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environment.etc."linode/longview.key" = {
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mode = "0400";
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text = cfg.apiKey;
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};
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environment.etc."linode/longview.d/Apache.conf" = {
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mode = "0400";
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text = apacheConf;
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};
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environment.etc."linode/longview.d/MySQL.conf" = {
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mode = "0400";
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text = mysqlConf;
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};
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environment.etc."linode/longview.d/Nginx.conf" = {
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mode = "0400";
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text = nginxConf;
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};
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};
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}
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