663 lines
22 KiB
Nix
663 lines
22 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.librenms;
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settingsFormat = pkgs.formats.json { };
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configJson = settingsFormat.generate "librenms-config.json" cfg.settings;
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package = pkgs.librenms.override {
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logDir = cfg.logDir;
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dataDir = cfg.dataDir;
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};
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phpOptions = ''
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log_errors = on
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post_max_size = 100M
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upload_max_filesize = 100M
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date.timezone = "${config.time.timeZone}"
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'';
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phpIni = pkgs.runCommand "php.ini"
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{
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inherit (package) phpPackage;
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inherit phpOptions;
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preferLocalBuild = true;
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passAsFile = [ "phpOptions" ];
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} ''
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cat $phpPackage/etc/php.ini $phpOptionsPath > $out
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'';
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artisanWrapper = pkgs.writeShellScriptBin "librenms-artisan" ''
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cd ${package}
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sudo=exec
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if [[ "$USER" != ${cfg.user} ]]; then
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sudo='exec /run/wrappers/bin/sudo -u ${cfg.user}'
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fi
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$sudo ${package}/artisan "$@"
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'';
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lnmsWrapper = pkgs.writeShellScriptBin "lnms" ''
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cd ${package}
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sudo=exec
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if [[ "$USER" != ${cfg.user} ]]; then
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sudo='exec /run/wrappers/bin/sudo -u ${cfg.user}'
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fi
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$sudo ${package}/lnms "$@"
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'';
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configFile = pkgs.writeText "config.php" ''
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<?php
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$new_config = json_decode(file_get_contents("${cfg.dataDir}/config.json"), true);
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$config = ($config == null) ? $new_config : array_merge($config, $new_config);
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${lib.optionalString (cfg.extraConfig != null) cfg.extraConfig}
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'';
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in
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{
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options.services.librenms = with lib; {
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enable = mkEnableOption "LibreNMS network monitoring system";
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user = mkOption {
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type = types.str;
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default = "librenms";
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description = ''
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Name of the LibreNMS user.
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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 = "librenms";
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description = ''
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Name of the LibreNMS group.
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'';
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};
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hostname = mkOption {
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type = types.str;
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default = config.networking.fqdnOrHostName;
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defaultText = literalExpression "config.networking.fqdnOrHostName";
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description = ''
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The hostname to serve LibreNMS on.
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'';
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};
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pollerThreads = mkOption {
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type = types.int;
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default = 16;
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description = ''
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Amount of threads of the cron-poller.
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'';
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};
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enableOneMinutePolling = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enables the [1-Minute Polling](https://docs.librenms.org/Support/1-Minute-Polling/).
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Changing this option will automatically convert your existing rrd files.
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'';
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};
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useDistributedPollers = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enables (distributed pollers)[https://docs.librenms.org/Extensions/Distributed-Poller/]
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for this LibreNMS instance. This will enable a local `rrdcached` and `memcached` server.
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To use this feature, make sure to configure your firewall that the distributed pollers
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can reach the local `mysql`, `rrdcached` and `memcached` ports.
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'';
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};
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distributedPoller = {
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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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Configure this LibreNMS instance as a (distributed poller)[https://docs.librenms.org/Extensions/Distributed-Poller/].
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This will disable all web features and just configure the poller features.
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Use the `mysql` database of your main LibreNMS instance in the database settings.
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'';
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};
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name = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Custom name of this poller.
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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 = "0";
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example = "1,2";
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description = ''
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Group(s) of this poller.
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'';
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};
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distributedBilling = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable distributed billing on this poller.
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'';
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};
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memcachedHost = mkOption {
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type = types.str;
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description = ''
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Hostname or IP of the `memcached` server.
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'';
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};
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memcachedPort = mkOption {
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type = types.port;
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default = 11211;
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description = ''
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Port of the `memcached` server.
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'';
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};
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rrdcachedHost = mkOption {
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type = types.str;
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description = ''
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Hostname or IP of the `rrdcached` server.
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'';
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};
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rrdcachedPort = mkOption {
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type = types.port;
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default = 42217;
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description = ''
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Port of the `memcached` server.
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'';
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};
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};
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poolConfig = mkOption {
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type = with types; attrsOf (oneOf [ str int bool ]);
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default = {
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"pm" = "dynamic";
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"pm.max_children" = 32;
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"pm.start_servers" = 2;
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"pm.min_spare_servers" = 2;
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"pm.max_spare_servers" = 4;
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"pm.max_requests" = 500;
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};
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description = ''
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Options for the LibreNMS PHP pool. See the documentation on `php-fpm.conf`
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for details on configuration directives.
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'';
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};
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nginx = mkOption {
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type = types.submodule (
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recursiveUpdate
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(import ../web-servers/nginx/vhost-options.nix { inherit config lib; })
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{ }
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);
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default = { };
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example = literalExpression ''
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{
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serverAliases = [
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"librenms.''${config.networking.domain}"
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];
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# To enable encryption and let let's encrypt take care of certificate
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forceSSL = true;
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enableACME = true;
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# To set the LibreNMS virtualHost as the default virtualHost;
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default = true;
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}
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'';
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description = ''
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With this option, you can customize the nginx virtualHost settings.
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'';
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/librenms";
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description = ''
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Path of the LibreNMS state directory.
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'';
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};
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logDir = mkOption {
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type = types.path;
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default = "/var/log/librenms";
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description = ''
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Path of the LibreNMS logging directory.
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'';
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};
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database = {
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createLocally = 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 create a local database automatically.
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'';
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};
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host = mkOption {
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default = "localhost";
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description = ''
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Hostname or IP of the MySQL/MariaDB server.
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Ignored if 'socket' is defined.
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'';
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};
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port = mkOption {
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type = types.port;
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default = 3306;
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description = ''
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Port of the MySQL/MariaDB server.
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Ignored if 'socket' is defined.
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'';
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};
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database = mkOption {
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type = types.str;
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default = "librenms";
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description = ''
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Name of the database on the MySQL/MariaDB server.
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'';
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};
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username = mkOption {
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type = types.str;
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default = "librenms";
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description = ''
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Name of the user on the MySQL/MariaDB server.
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Ignored if 'socket' is defined.
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'';
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};
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passwordFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = "/run/secrets/mysql.pass";
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description = ''
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A file containing the password for the user of the MySQL/MariaDB server.
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Must be readable for the LibreNMS user.
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Ignored if 'socket' is defined, mandatory otherwise.
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'';
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};
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socket = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "/run/mysqld/mysqld.sock";
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description = ''
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A unix socket to mysql, accessible by the librenms user.
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Useful when mysql is on the localhost.
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'';
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};
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};
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environmentFile = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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File containing env-vars to be substituted into the final config. Useful for secrets.
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Does not apply to settings defined in `extraConfig`.
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'';
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};
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settings = mkOption {
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type = types.submodule {
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freeformType = settingsFormat.type;
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options = { };
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};
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description = ''
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Attrset of the LibreNMS configuration.
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See https://docs.librenms.org/Support/Configuration/ for reference.
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All possible options are listed [here](https://github.com/librenms/librenms/blob/master/misc/config_definitions.json).
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See https://docs.librenms.org/Extensions/Authentication/ for setting other authentication methods.
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'';
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default = { };
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example = {
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base_url = "/librenms/";
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top_devices = true;
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top_ports = false;
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};
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};
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extraConfig = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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Additional config for LibreNMS that will be appended to the `config.php`. See
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https://github.com/librenms/librenms/blob/master/misc/config_definitions.json
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for possible options. Useful if you want to use PHP-Functions in your config.
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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assertions = [
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{
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assertion = config.time.timeZone != null;
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message = "You must set `time.timeZone` to use the LibreNMS module.";
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}
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{
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assertion = cfg.database.createLocally -> cfg.database.host == "localhost";
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message = "The database host must be \"localhost\" if services.librenms.database.createLocally is set to true.";
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}
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{
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assertion = !(cfg.useDistributedPollers && cfg.distributedPoller.enable);
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message = "The LibreNMS instance can't be a distributed poller and a full instance at the same time.";
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}
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];
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users.users.${cfg.user} = {
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group = "${cfg.group}";
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isSystemUser = true;
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};
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users.groups.${cfg.group} = { };
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services.librenms.settings = {
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# basic configs
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"user" = cfg.user;
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"own_hostname" = cfg.hostname;
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"base_url" = lib.mkDefault "/";
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"auth_mechanism" = lib.mkDefault "mysql";
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# disable auto update function (won't work with NixOS)
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"update" = false;
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# enable fast ping by default
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"ping_rrd_step" = 60;
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# one minute polling
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"rrd.step" = if cfg.enableOneMinutePolling then 60 else 300;
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"rrd.heartbeat" = if cfg.enableOneMinutePolling then 120 else 600;
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} // (lib.optionalAttrs cfg.distributedPoller.enable {
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"distributed_poller" = true;
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"distributed_poller_name" = lib.mkIf (cfg.distributedPoller.name != null) cfg.distributedPoller.name;
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"distributed_poller_group" = cfg.distributedPoller.group;
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"distributed_billing" = cfg.distributedPoller.distributedBilling;
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"distributed_poller_memcached_host" = cfg.distributedPoller.memcachedHost;
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"distributed_poller_memcached_port" = cfg.distributedPoller.memcachedPort;
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"rrdcached" = "${cfg.distributedPoller.rrdcachedHost}:${toString cfg.distributedPoller.rrdcachedPort}";
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}) // (lib.optionalAttrs cfg.useDistributedPollers {
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"distributed_poller" = true;
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# still enable a local poller with distributed polling
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"distributed_poller_group" = lib.mkDefault "0";
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"distributed_billing" = lib.mkDefault true;
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"distributed_poller_memcached_host" = "localhost";
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"distributed_poller_memcached_port" = 11211;
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"rrdcached" = "localhost:42217";
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});
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services.memcached = lib.mkIf cfg.useDistributedPollers {
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enable = true;
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listen = "0.0.0.0";
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};
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systemd.services.rrdcached = lib.mkIf cfg.useDistributedPollers {
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description = "rrdcached";
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after = [ "librenms-setup.service" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "forking";
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User = cfg.user;
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Group = cfg.group;
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LimitNOFILE = 16384;
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RuntimeDirectory = "rrdcached";
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PidFile = "/run/rrdcached/rrdcached.pid";
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# rrdcached params from https://docs.librenms.org/Extensions/Distributed-Poller/#config-sample
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ExecStart = "${pkgs.rrdtool}/bin/rrdcached -l 0:42217 -R -j ${cfg.dataDir}/rrdcached-journal/ -F -b ${cfg.dataDir}/rrd -B -w 1800 -z 900 -p /run/rrdcached/rrdcached.pid";
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};
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};
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services.mysql = lib.mkIf cfg.database.createLocally {
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enable = true;
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package = lib.mkDefault pkgs.mariadb;
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settings.mysqld = {
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innodb_file_per_table = 1;
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lower_case_table_names = 0;
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} // (lib.optionalAttrs cfg.useDistributedPollers {
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bind-address = "0.0.0.0";
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});
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ensureDatabases = [ cfg.database.database ];
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ensureUsers = [
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{
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name = cfg.database.username;
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ensurePermissions = {
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"${cfg.database.database}.*" = "ALL PRIVILEGES";
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};
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}
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];
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initialScript = lib.mkIf cfg.useDistributedPollers (pkgs.writeText "mysql-librenms-init" ''
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CREATE USER IF NOT EXISTS '${cfg.database.username}'@'%';
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GRANT ALL PRIVILEGES ON ${cfg.database.database}.* TO '${cfg.database.username}'@'%';
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'');
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};
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services.nginx = lib.mkIf (!cfg.distributedPoller.enable) {
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enable = true;
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virtualHosts."${cfg.hostname}" = lib.mkMerge [
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cfg.nginx
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{
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root = lib.mkForce "${package}/html";
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locations."/" = {
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index = "index.php";
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tryFiles = "$uri $uri/ /index.php?$query_string";
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};
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locations."~ .php$".extraConfig = ''
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fastcgi_pass unix:${config.services.phpfpm.pools."librenms".socket};
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fastcgi_split_path_info ^(.+\.php)(/.+)$;
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'';
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}
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];
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};
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services.phpfpm.pools.librenms = lib.mkIf (!cfg.distributedPoller.enable) {
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user = cfg.user;
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group = cfg.group;
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inherit (package) phpPackage;
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inherit phpOptions;
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settings = {
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"listen.mode" = "0660";
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"listen.owner" = config.services.nginx.user;
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"listen.group" = config.services.nginx.group;
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} // cfg.poolConfig;
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};
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systemd.services.librenms-scheduler = {
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description = "LibreNMS Scheduler";
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path = [ pkgs.unixtools.whereis ];
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serviceConfig = {
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Type = "oneshot";
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WorkingDirectory = package;
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User = cfg.user;
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Group = cfg.group;
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ExecStart = "${artisanWrapper}/bin/librenms-artisan schedule:run";
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};
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};
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systemd.timers.librenms-scheduler = {
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description = "LibreNMS Scheduler";
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "minutely";
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AccuracySec = "1second";
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};
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};
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systemd.services.librenms-setup = {
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description = "Preparation tasks for LibreNMS";
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before = [ "phpfpm-librenms.service" ];
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after = [ "systemd-tmpfiles-setup.service" ]
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++ (lib.optional (cfg.database.host == "localhost") "mysql.service");
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wantedBy = [ "multi-user.target" ];
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restartTriggers = [ package configFile ];
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path = [ pkgs.mariadb pkgs.unixtools.whereis pkgs.gnused ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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EnvironmentFile = lib.mkIf (cfg.environmentFile != null) [ cfg.environmentFile ];
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User = cfg.user;
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Group = cfg.group;
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ExecStartPre = lib.mkIf cfg.database.createLocally [
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"!${pkgs.writeShellScript "librenms-db-init" ''
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DB_PASSWORD=$(cat ${cfg.database.passwordFile} | tr -d '\n')
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echo "ALTER USER '${cfg.database.username}'@'localhost' IDENTIFIED BY '$DB_PASSWORD';" | ${pkgs.mariadb}/bin/mysql
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${lib.optionalString cfg.useDistributedPollers ''
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echo "ALTER USER '${cfg.database.username}'@'%' IDENTIFIED BY '$DB_PASSWORD';" | ${pkgs.mariadb}/bin/mysql
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''}
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''}"
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];
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};
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script = ''
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set -euo pipefail
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# config setup
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ln -sf ${configFile} ${cfg.dataDir}/config.php
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${pkgs.envsubst}/bin/envsubst -i ${configJson} -o ${cfg.dataDir}/config.json
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export PHPRC=${phpIni}
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if [[ ! -s ${cfg.dataDir}/.env ]]; then
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# init .env file
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echo "APP_KEY=" > ${cfg.dataDir}/.env
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${artisanWrapper}/bin/librenms-artisan key:generate --ansi
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${artisanWrapper}/bin/librenms-artisan webpush:vapid
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|
echo "" >> ${cfg.dataDir}/.env
|
|
echo -n "NODE_ID=" >> ${cfg.dataDir}/.env
|
|
${package.phpPackage}/bin/php -r "echo uniqid();" >> ${cfg.dataDir}/.env
|
|
echo "" >> ${cfg.dataDir}/.env
|
|
else
|
|
# .env file already exists --> only update database and cache config
|
|
${pkgs.gnused}/bin/sed -i /^DB_/d ${cfg.dataDir}/.env
|
|
${pkgs.gnused}/bin/sed -i /^CACHE_DRIVER/d ${cfg.dataDir}/.env
|
|
fi
|
|
${lib.optionalString (cfg.useDistributedPollers || cfg.distributedPoller.enable) ''
|
|
echo "CACHE_DRIVER=memcached" >> ${cfg.dataDir}/.env
|
|
''}
|
|
echo "DB_DATABASE=${cfg.database.database}" >> ${cfg.dataDir}/.env
|
|
''
|
|
+ (
|
|
if ! isNull cfg.database.socket
|
|
then ''
|
|
# use socket connection
|
|
echo "DB_SOCKET=${cfg.database.socket}" >> ${cfg.dataDir}/.env
|
|
''
|
|
else ''
|
|
# use TCP connection
|
|
echo "DB_HOST=${cfg.database.host}" >> ${cfg.dataDir}/.env
|
|
echo "DB_PORT=${toString cfg.database.port}" >> ${cfg.dataDir}/.env
|
|
echo "DB_USERNAME=${cfg.database.username}" >> ${cfg.dataDir}/.env
|
|
echo -n "DB_PASSWORD=" >> ${cfg.dataDir}/.env
|
|
cat ${cfg.database.passwordFile} >> ${cfg.dataDir}/.env
|
|
''
|
|
)
|
|
+ ''
|
|
# clear cache after update
|
|
OLD_VERSION=$(cat ${cfg.dataDir}/version)
|
|
if [[ $OLD_VERSION != "${package.version}" ]]; then
|
|
rm -r ${cfg.dataDir}/cache/*
|
|
echo "${package.version}" > ${cfg.dataDir}/version
|
|
fi
|
|
|
|
# convert rrd files when the oneMinutePolling option is changed
|
|
OLD_ENABLED=$(cat ${cfg.dataDir}/one_minute_enabled)
|
|
if [[ $OLD_ENABLED != "${lib.boolToString cfg.enableOneMinutePolling}" ]]; then
|
|
${package}/scripts/rrdstep.php -h all
|
|
echo "${lib.boolToString cfg.enableOneMinutePolling}" > ${cfg.dataDir}/one_minute_enabled
|
|
fi
|
|
|
|
# migrate db
|
|
${artisanWrapper}/bin/librenms-artisan migrate --force --no-interaction
|
|
'';
|
|
};
|
|
|
|
programs.mtr.enable = true;
|
|
|
|
services.logrotate = {
|
|
enable = true;
|
|
settings."${cfg.logDir}/librenms.log" = {
|
|
su = "${cfg.user} ${cfg.group}";
|
|
create = "0640 ${cfg.user} ${cfg.group}";
|
|
rotate = 6;
|
|
frequency = "weekly";
|
|
compress = true;
|
|
delaycompress = true;
|
|
missingok = true;
|
|
notifempty = true;
|
|
};
|
|
};
|
|
|
|
services.cron = {
|
|
enable = true;
|
|
systemCronJobs =
|
|
let
|
|
env = "PHPRC=${phpIni}";
|
|
in
|
|
[
|
|
# based on crontab provided by LibreNMS
|
|
"33 */6 * * * ${cfg.user} ${env} ${package}/cronic ${package}/discovery-wrapper.py 1"
|
|
"*/5 * * * * ${cfg.user} ${env} ${package}/discovery.php -h new >> /dev/null 2>&1"
|
|
|
|
"${if cfg.enableOneMinutePolling then "*" else "*/5"} * * * * ${cfg.user} ${env} ${package}/cronic ${package}/poller-wrapper.py ${toString cfg.pollerThreads}"
|
|
"* * * * * ${cfg.user} ${env} ${package}/alerts.php >> /dev/null 2>&1"
|
|
|
|
"*/5 * * * * ${cfg.user} ${env} ${package}/poll-billing.php >> /dev/null 2>&1"
|
|
"01 * * * * ${cfg.user} ${env} ${package}/billing-calculate.php >> /dev/null 2>&1"
|
|
"*/5 * * * * ${cfg.user} ${env} ${package}/check-services.php >> /dev/null 2>&1"
|
|
|
|
# extra: fast ping
|
|
"* * * * * ${cfg.user} ${env} ${package}/ping.php >> /dev/null 2>&1"
|
|
|
|
# daily.sh tasks are split to exclude update
|
|
"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh cleanup >> /dev/null 2>&1"
|
|
"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh notifications >> /dev/null 2>&1"
|
|
"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh peeringdb >> /dev/null 2>&1"
|
|
"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh mac_oui >> /dev/null 2>&1"
|
|
];
|
|
};
|
|
|
|
security.wrappers = {
|
|
fping = {
|
|
setuid = true;
|
|
owner = "root";
|
|
group = "root";
|
|
source = "${pkgs.fping}/bin/fping";
|
|
};
|
|
};
|
|
|
|
environment.systemPackages = [ artisanWrapper lnmsWrapper ];
|
|
|
|
systemd.tmpfiles.rules = [
|
|
"d ${cfg.logDir} 0750 ${cfg.user} ${cfg.group} - -"
|
|
"f ${cfg.logDir}/librenms.log 0640 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir} 0750 ${cfg.user} ${cfg.group} - -"
|
|
"f ${cfg.dataDir}/.env 0600 ${cfg.user} ${cfg.group} - -"
|
|
"f ${cfg.dataDir}/version 0600 ${cfg.user} ${cfg.group} - -"
|
|
"f ${cfg.dataDir}/one_minute_enabled 0600 ${cfg.user} ${cfg.group} - -"
|
|
"f ${cfg.dataDir}/config.json 0600 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/app 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/debugbar 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/framework 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/framework/cache 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/framework/sessions 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/framework/views 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/storage/logs 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/rrd 0700 ${cfg.user} ${cfg.group} - -"
|
|
"d ${cfg.dataDir}/cache 0700 ${cfg.user} ${cfg.group} - -"
|
|
] ++ lib.optionals cfg.useDistributedPollers [
|
|
"d ${cfg.dataDir}/rrdcached-journal 0700 ${cfg.user} ${cfg.group} - -"
|
|
];
|
|
|
|
};
|
|
|
|
meta.maintainers = lib.teams.wdz.members;
|
|
}
|