Tom Hubrecht
42e1d6dcd7
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684 lines
22 KiB
Nix
684 lines
22 KiB
Nix
{
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config,
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lib,
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pkgs,
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modulesPath,
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...
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}:
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let
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inherit (lib)
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literalExpression
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mkEnableOption
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mkOption
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recursiveUpdate
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types
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;
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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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inherit (cfg) package;
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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 =
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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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''
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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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exec ${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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disabledModules = [ "services/monitoring/librenms.nix" ];
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options.services.librenms = {
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enable = mkEnableOption "LibreNMS network monitoring system";
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package = mkOption {
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type = types.package;
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default = pkgs.librenms.override { inherit (cfg) dataDir logDir; };
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description = "Librenms package to use.";
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};
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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 =
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with types;
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attrsOf (
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oneOf [
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str
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int
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bool
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]
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);
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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 "${modulesPath}/services/web-servers/nginx/vhost-options.nix" { inherit config lib; })
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{ }
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);
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default = { };
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example = literalExpression ''
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{
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serverAliases = [
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"librenms.''${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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'';
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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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'';
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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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'';
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};
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passwordFile = mkOption {
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type = types.path;
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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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'';
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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 = {
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librenms.settings =
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{
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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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}
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// (lib.optionalAttrs cfg.distributedPoller.enable {
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"distributed_poller" = true;
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"distributed_poller_name" =
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lib.mkIf (cfg.distributedPoller.name != null)
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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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})
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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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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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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 { bind-address = "0.0.0.0"; });
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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 (
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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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};
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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)(/.+)$;
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'';
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}
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];
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};
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phpfpm.pools.librenms = lib.mkIf (!cfg.distributedPoller.enable) {
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inherit (cfg) group user;
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inherit (package) phpPackage;
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inherit phpOptions;
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settings = {
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"listen.mode" = "0660";
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"listen.owner" = config.services.nginx.user;
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"listen.group" = config.services.nginx.group;
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} // cfg.poolConfig;
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};
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logrotate = {
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enable = true;
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settings."${cfg.logDir}/librenms.log" = {
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su = "${cfg.user} ${cfg.group}";
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create = "0640 ${cfg.user} ${cfg.group}";
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rotate = 6;
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frequency = "weekly";
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compress = true;
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delaycompress = true;
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missingok = true;
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notifempty = true;
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};
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};
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cron = {
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enable = true;
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systemCronJobs =
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let
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env = "PHPRC=${phpIni}";
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in
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[
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# based on crontab provided by LibreNMS
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"33 */6 * * * ${cfg.user} ${env} ${package}/cronic ${package}/discovery-wrapper.py 1"
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"*/5 * * * * ${cfg.user} ${env} ${package}/discovery.php -h new >> /dev/null 2>&1"
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"${
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if cfg.enableOneMinutePolling then "*" else "*/5"
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} * * * * ${cfg.user} ${env} ${package}/cronic ${package}/poller-wrapper.py ${toString cfg.pollerThreads}"
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"* * * * * ${cfg.user} ${env} ${package}/alerts.php >> /dev/null 2>&1"
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"*/5 * * * * ${cfg.user} ${env} ${package}/poll-billing.php >> /dev/null 2>&1"
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"01 * * * * ${cfg.user} ${env} ${package}/billing-calculate.php >> /dev/null 2>&1"
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"*/5 * * * * ${cfg.user} ${env} ${package}/check-services.php >> /dev/null 2>&1"
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# extra: fast ping
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"* * * * * ${cfg.user} ${env} ${package}/ping.php >> /dev/null 2>&1"
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# daily.sh tasks are split to exclude update
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"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh cleanup >> /dev/null 2>&1"
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"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh notifications >> /dev/null 2>&1"
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"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh peeringdb >> /dev/null 2>&1"
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"19 0 * * * ${cfg.user} ${env} ${package}/daily.sh mac_oui >> /dev/null 2>&1"
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];
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};
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};
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systemd = {
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services = {
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rrdcached = lib.mkIf cfg.useDistributedPollers {
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description = "rrdcached";
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after = [ "librenms-setup.service" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "forking";
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User = cfg.user;
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Group = cfg.group;
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LimitNOFILE = 16384;
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RuntimeDirectory = "rrdcached";
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PidFile = "/run/rrdcached/rrdcached.pid";
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# rrdcached params from https://docs.librenms.org/Extensions/Distributed-Poller/#config-sample
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ExecStart = "${pkgs.rrdtool}/bin/rrdcached -l 0:42217 -R -j ${cfg.dataDir}/rrdcached-journal/ -F -b ${cfg.dataDir}/rrd -B -w 1800 -z 900 -p /run/rrdcached/rrdcached.pid";
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};
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};
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|
librenms-scheduler = {
|
|
description = "LibreNMS Scheduler";
|
|
path = [ pkgs.unixtools.whereis ];
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
WorkingDirectory = package;
|
|
User = cfg.user;
|
|
Group = cfg.group;
|
|
ExecStart = "${artisanWrapper}/bin/librenms-artisan schedule:run";
|
|
};
|
|
};
|
|
|
|
librenms-setup = {
|
|
description = "Preparation tasks for LibreNMS";
|
|
before = [ "phpfpm-librenms.service" ];
|
|
after = [
|
|
"systemd-tmpfiles-setup.service"
|
|
] ++ (lib.optional (cfg.database.host == "localhost") "mysql.service");
|
|
wantedBy = [ "multi-user.target" ];
|
|
restartTriggers = [
|
|
package
|
|
configFile
|
|
];
|
|
path = [
|
|
pkgs.mariadb
|
|
pkgs.unixtools.whereis
|
|
pkgs.gnused
|
|
];
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
RemainAfterExit = true;
|
|
EnvironmentFile = lib.mkIf (cfg.environmentFile != null) [ cfg.environmentFile ];
|
|
User = cfg.user;
|
|
Group = cfg.group;
|
|
ExecStartPre = lib.mkIf cfg.database.createLocally [
|
|
"!${pkgs.writeShellScript "librenms-db-init" ''
|
|
DB_PASSWORD=$(cat ${cfg.database.passwordFile} | tr -d '\n')
|
|
echo "ALTER USER '${cfg.database.username}'@'localhost' IDENTIFIED BY '$DB_PASSWORD';" | ${pkgs.mariadb}/bin/mysql
|
|
${lib.optionalString cfg.useDistributedPollers ''
|
|
echo "ALTER USER '${cfg.database.username}'@'%' IDENTIFIED BY '$DB_PASSWORD';" | ${pkgs.mariadb}/bin/mysql
|
|
''}
|
|
''}"
|
|
];
|
|
};
|
|
script = ''
|
|
set -euo pipefail
|
|
|
|
# config setup
|
|
ln -sf ${configFile} ${cfg.dataDir}/config.php
|
|
${pkgs.envsubst}/bin/envsubst -i ${configJson} -o ${cfg.dataDir}/config.json
|
|
export PHPRC=${phpIni}
|
|
|
|
if [[ ! -s ${cfg.dataDir}/.env ]]; then
|
|
# init .env file
|
|
echo "APP_KEY=" > ${cfg.dataDir}/.env
|
|
${artisanWrapper}/bin/librenms-artisan key:generate --ansi
|
|
${artisanWrapper}/bin/librenms-artisan webpush:vapid
|
|
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" >> ${cfg.dataDir}/.env
|
|
''}
|
|
echo "DB_HOST=${cfg.database.host}" >> ${cfg.dataDir}/.env
|
|
echo "DB_PORT=${toString cfg.database.port}" >> ${cfg.dataDir}/.env
|
|
echo "DB_DATABASE=${cfg.database.database}" >> ${cfg.dataDir}/.env
|
|
echo "DB_USERNAME=${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
|
|
'';
|
|
};
|
|
};
|
|
|
|
timers.librenms-scheduler = {
|
|
description = "LibreNMS Scheduler";
|
|
wantedBy = [ "timers.target" ];
|
|
timerConfig = {
|
|
OnCalendar = "minutely";
|
|
AccuracySec = "1second";
|
|
};
|
|
};
|
|
|
|
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} ${cfg.group} - -"
|
|
];
|
|
};
|
|
|
|
programs.mtr.enable = true;
|
|
|
|
security.wrappers = {
|
|
fping = {
|
|
setuid = true;
|
|
owner = "root";
|
|
group = "root";
|
|
source = "${pkgs.fping}/bin/fping";
|
|
};
|
|
};
|
|
|
|
environment.systemPackages = [
|
|
artisanWrapper
|
|
lnmsWrapper
|
|
];
|
|
};
|
|
|
|
meta.maintainers = lib.teams.wdz.members;
|
|
}
|