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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Sou Bunnbu <iyzsong@member.fsf.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu services monitoring)
+ #:use-module (gnu services)
+ #:use-module (gnu services shepherd)
+ #:use-module (gnu packages admin)
+ #:use-module (gnu packages monitoring)
+ #:use-module (gnu system shadow)
+ #:use-module (guix gexp)
+ #:use-module (guix records)
+ #:use-module (ice-9 match)
+ #:export (darkstat-configuration
+ darkstat-service-type))
+
+
+;;;
+;;; darkstat
+;;;
+
+(define-record-type* <darkstat-configuration>
+ darkstat-configuration make-darkstat-configuration darkstat-configuration?
+ (package darkstat-configuration-package
+ (default darkstat))
+ (interface darkstat-configuration-interface)
+ (port darkstat-configuration-port
+ (default "667"))
+ (bind-address darkstat-configuration-bind-address
+ (default "127.0.0.1"))
+ (base darkstat-configuration-base
+ (default "/")))
+
+(define %darkstat-accounts
+ (list (user-account
+ (name "darkstat")
+ (group "darkstat")
+ (system? #t)
+ (comment "darkstat daemon user")
+ (home-directory "/var/lib/darkstat")
+ (shell (file-append shadow "/sbin/nologin")))
+ (user-group
+ (name "darkstat")
+ (system? #t))))
+
+(define darkstat-shepherd-service
+ (match-lambda
+ (($ <darkstat-configuration>
+ package interface port bind-address base)
+ (shepherd-service
+ (documentation "Network statistics gatherer.")
+ (provision '(darkstat))
+ (requirement '(networking))
+ (start #~(make-forkexec-constructor
+ (list #$(file-append package "/sbin/darkstat")
+ "-i" #$interface
+ "-p" #$port
+ "-b" #$bind-address
+ "--base" #$base
+ "--syslog" "--no-daemon"
+ "--chroot" "/var/lib/darkstat"
+ "--user" "darkstat"
+ "--import" "darkstat.db"
+ "--export" "darkstat.db")))
+ (stop #~(make-kill-destructor))))))
+
+(define darkstat-service-type
+ (service-type
+ (name 'darkstat)
+ (description
+ "Run @command{darkstat} to serve network traffic statictics reports over
+HTTP.")
+ (extensions
+ (list (service-extension account-service-type
+ (const %darkstat-accounts))
+ (service-extension shepherd-root-service-type
+ (compose list darkstat-shepherd-service))))))