added netinfo, etc

config/fudo/netinfo-email.nix

@@ -0,0 +1,93 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.fudo.netinfo-email;
+
+  make-script = server: port: target: pkgs.writeText "netinfo-script.rb" ''
+    #!${pkgs.ruby}/bin/ruby
+
+    require 'net/smtp'
+
+    raise RuntimeError.new("NETINFO_SMTP_USERNAME not set!") if not ENV['NETINFO_SMTP_USERNAME']
+    user = ENV['NETINFO_SMTP_USERNAME']
+
+    raise RuntimeError.new("NETINFO_SMTP_PASSWD not set!") if not ENV['NETINFO_SMTP_PASSWD']
+    passwd = ENV['NETINFO_SMTP_PASSWD']
+
+    hostname = `${pkgs.inetutils}/bin/hostname -f`.strip
+    date = `${pkgs.coreutils}/bin/date +%Y-%m-%d`.strip
+    email_date = `${pkgs.coreutils}/bin/date`
+    ipinfo = `${pkgs.iproute}/bin/ip addr`
+
+    message = <<EOM
+    From: #{user}@fudo.org
+    To: ${target}
+    Subject: #{hostname} network info for #{date}
+    Date: #{email_date}
+
+    #{ipinfo}
+    EOM
+
+    smtp = Net::SMTP.new("${server}", ${toString port})
+    smtp.enable_starttls
+
+    smtp.start('localhost', user, passwd) do |server|
+      server.send_message(message, "#{user}@fudo.org", ["${target}"])
+    end
+  '';
+
+in {
+
+  options.fudo.netinfo-email = {
+    enable = mkEnableOption "Enable netinfo email (hacky way to keep track of a host's IP";
+
+    smtp-server = mkOption {
+      type = types.str;
+      default = "mail.fudo.org";
+    };
+
+    smtp-port = mkOption {
+      type = types.port;
+      default = 587;
+    };
+
+    env-file = mkOption {
+      type = types.str;
+      description = "Path to file containing NETINFO_SMTP_USERNAME and NETINFO_SMTP_PASSWD";
+    };
+
+    target-email = mkOption {
+      type = types.str;
+      default = "network-info@fudo.link";
+      description = "Email to which to send network info report.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd = {
+      timers.netinfo = {
+        enable = true;
+        description = "Send network info to ${cfg.target-email}";
+        partOf = ["netinfo.service"];
+        wantedBy = [ "timers.target" ];
+        requires = [ "network-online.target" ];
+        timerConfig = {
+          OnCalendar = "daily";
+        };
+      };
+
+      services.netinfo = {
+        enable = true;
+        serviceConfig = {
+          Type = "oneshot";
+          StandardOutput = "journal";
+          EnvironmentFile = cfg.env-file;
+        };
+        script = ''
+          ${pkgs.ruby}/bin/ruby ${make-script cfg.smtp-server cfg.smtp-port cfg.target-email}
+        '';
+      };
+    };
+  };
+}

config/local.nix

@@ -16,6 +16,7 @@ with lib;
     ./fudo/mail.nix
     ./fudo/mail-container.nix
     ./fudo/minecraft-server.nix
+    ./fudo/netinfo-email.nix
     ./fudo/node-exporter.nix
     ./fudo/postgres.nix
     ./fudo/prometheus.nix