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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 ng0 <ng0@we.make.ritual.n0.is>
;;; Copyright © 2016 Sou Bunnbu <iyzsong@member.fsf.org>
;;; Copyright © 2017, 2018 Clément Lassieur <clement@lassieur.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 certbot)
#:use-module (gnu services)
#:use-module (gnu services base)
#:use-module (gnu services shepherd)
#:use-module (gnu services mcron)
#:use-module (gnu services web)
#:use-module (gnu system shadow)
#:use-module (gnu packages tls)
#:use-module (guix records)
#:use-module (guix gexp)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
#:export (certbot-service-type
certbot-configuration
certbot-configuration?))
;;; Commentary:
;;;
;;; Automatically obtaining TLS certificates from Let's Encrypt.
;;;
;;; Code:
(define-record-type* <certbot-configuration>
certbot-configuration make-certbot-configuration
certbot-configuration?
(package certbot-configuration-package
(default certbot))
(webroot certbot-configuration-webroot
(default "/var/www"))
(domains certbot-configuration-domains
(default '()))
(default-location certbot-configuration-default-location
(default
(nginx-location-configuration
(uri "/")
(body
(list "return 301 https://$host$request_uri;"))))))
(define certbot-renewal-jobs
(match-lambda
(($ <certbot-configuration> package webroot domains default-location)
(match domains
;; Avoid pinging certbot if we have no domains.
(() '())
(_
(list
;; Attempt to renew the certificates twice per day, at a random
;; minute within the hour. See
;; https://certbot.eff.org/all-instructions/.
#~(job '(next-minute-from (next-hour '(0 12)) (list (random 60)))
(string-append #$package "/bin/certbot renew"
(string-concatenate
(map (lambda (domain)
(string-append " -d " domain))
'#$domains))))))))))
(define certbot-activation
(match-lambda
(($ <certbot-configuration> package webroot domains default-location)
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils))
(mkdir-p #$webroot)
(for-each
(lambda (domain)
(unless (file-exists?
(in-vicinity "/etc/letsencrypt/live" domain))
(unless (zero? (system*
(string-append #$certbot "/bin/certbot")
"certonly" "--webroot" "-w" #$webroot
"-d" domain))
(error "failed to acquire cert for domain" domain))))
'#$domains))))))
(define certbot-nginx-server-configurations
(match-lambda
(($ <certbot-configuration> package webroot domains default-location)
(map
(lambda (domain)
(nginx-server-configuration
(listen '("80" "[::]:80"))
(ssl-certificate #f)
(ssl-certificate-key #f)
(server-name (list domain))
(locations
(filter identity
(list
(nginx-location-configuration
(uri "/.well-known")
(body (list (list "root " webroot ";"))))
default-location)))))
domains))))
(define certbot-service-type
(service-type (name 'certbot)
(extensions
(list (service-extension nginx-service-type
certbot-nginx-server-configurations)
(service-extension activation-service-type
certbot-activation)
(service-extension mcron-service-type
certbot-renewal-jobs)))
(compose concatenate)
(extend (lambda (config additional-domains)
(certbot-configuration
(inherit config)
(domains (append
(certbot-configuration-domains config)
additional-domains)))))
(default-value (certbot-configuration))
(description
"Automatically renew @url{https://letsencrypt.org, Let's
Encrypt} HTTPS certificates by adjusting the nginx web server configuration
and periodically invoking @command{certbot}.")))
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