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Raghav Gururajan
1bf1226a4f
* gnu/services/certbot.scm (<certificate-configuration>): Add csr field. (certbot-command): Modify. * doc/guix.texi (Certificate Services): Document it.
210 lines
9 KiB
Scheme
210 lines
9 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016 Nikita <nikita@n0.is>
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;;; Copyright © 2016 Sou Bunnbu <iyzsong@member.fsf.org>
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;;; Copyright © 2017, 2018 Clément Lassieur <clement@lassieur.org>
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;;; Copyright © 2019 Julien Lepiller <julien@lepiller.eu>
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;;; Copyright © 2020 Jack Hill <jackhill@jackhill.us>
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;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
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;;; Copyright © 2021 Raghav Gururajan <rg@raghavgururajan.name>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services certbot)
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#:use-module (gnu services)
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#:use-module (gnu services base)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services mcron)
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#:use-module (gnu services web)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages tls)
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#:use-module (guix i18n)
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (srfi srfi-1)
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#:use-module (ice-9 match)
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#:export (certbot-service-type
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certbot-configuration
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certbot-configuration?
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certificate-configuration))
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;;; Commentary:
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;;;
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;;; Automatically obtaining TLS certificates from Let's Encrypt.
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;;;
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;;; Code:
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(define-record-type* <certificate-configuration>
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certificate-configuration make-certificate-configuration
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certificate-configuration?
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(name certificate-configuration-name
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(default #f))
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(domains certificate-configuration-domains
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(default '()))
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(challenge certificate-configuration-challenge
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(default #f))
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(csr certificate-configuration-csr
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(default #f))
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(authentication-hook certificate-authentication-hook
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(default #f))
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(cleanup-hook certificate-cleanup-hook
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(default #f))
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(deploy-hook certificate-configuration-deploy-hook
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(default #f)))
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(define-record-type* <certbot-configuration>
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certbot-configuration make-certbot-configuration
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certbot-configuration?
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(package certbot-configuration-package
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(default certbot))
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(webroot certbot-configuration-webroot
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(default "/var/www"))
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(certificates certbot-configuration-certificates
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(default '()))
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(email certbot-configuration-email
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(default #f))
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(server certbot-configuration-server
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(default #f))
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(rsa-key-size certbot-configuration-rsa-key-size
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(default #f))
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(default-location certbot-configuration-default-location
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(default
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(nginx-location-configuration
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(uri "/")
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(body
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(list "return 301 https://$host$request_uri;"))))))
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(define certbot-command
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(match-lambda
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(($ <certbot-configuration> package webroot certificates email
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server rsa-key-size default-location)
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(let* ((certbot (file-append package "/bin/certbot"))
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(rsa-key-size (and rsa-key-size (number->string rsa-key-size)))
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(commands
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(map
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(match-lambda
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(($ <certificate-configuration> custom-name domains challenge
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csr authentication-hook
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cleanup-hook deploy-hook)
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(let ((name (or custom-name (car domains))))
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(if challenge
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(append
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(list name certbot "certonly" "-n" "--agree-tos"
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"--manual"
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(string-append "--preferred-challenges=" challenge)
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"--cert-name" name
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"--manual-public-ip-logging-ok"
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"-d" (string-join domains ","))
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(if csr `("--csr" ,csr) '())
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(if email
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`("--email" ,email)
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'("--register-unsafely-without-email"))
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(if server `("--server" ,server) '())
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(if rsa-key-size `("--rsa-key-size" ,rsa-key-size) '())
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(if authentication-hook
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`("--manual-auth-hook" ,authentication-hook)
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'())
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(if cleanup-hook `("--manual-cleanup-hook" ,cleanup-hook) '())
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(if deploy-hook `("--deploy-hook" ,deploy-hook) '()))
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(append
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(list name certbot "certonly" "-n" "--agree-tos"
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"--webroot" "-w" webroot
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"--cert-name" name
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"-d" (string-join domains ","))
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(if csr `("--csr" ,csr) '())
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(if email
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`("--email" ,email)
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'("--register-unsafely-without-email"))
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(if server `("--server" ,server) '())
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(if rsa-key-size `("--rsa-key-size" ,rsa-key-size) '())
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(if deploy-hook `("--deploy-hook" ,deploy-hook) '()))))))
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certificates)))
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(program-file
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"certbot-command"
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#~(begin
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(use-modules (ice-9 match))
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(let ((code 0))
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(for-each
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(match-lambda
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((name . command)
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(begin
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(format #t "Acquiring or renewing certificate: ~a~%" name)
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(set! code (or (apply system* command) code)))))
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'#$commands) code)))))))
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(define (certbot-renewal-jobs config)
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(list
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;; Attempt to renew the certificates twice per day, at a random minute
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;; within the hour. See https://certbot.eff.org/all-instructions/.
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#~(job '(next-minute-from (next-hour '(0 12)) (list (random 60)))
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#$(certbot-command config))))
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(define (certbot-activation config)
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(let* ((certbot-directory "/var/lib/certbot")
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(script (in-vicinity certbot-directory "renew-certificates"))
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(message (format #f (G_ "~a may need to be run~%") script)))
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(match config
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(($ <certbot-configuration> package webroot certificates email
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server rsa-key-size default-location)
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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(mkdir-p #$webroot)
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(mkdir-p #$certbot-directory)
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(copy-file #$(certbot-command config) #$script)
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(display #$message)))))))
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(define certbot-nginx-server-configurations
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(match-lambda
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(($ <certbot-configuration> package webroot certificates email
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server rsa-key-size default-location)
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(list
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(nginx-server-configuration
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(listen '("80" "[::]:80"))
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(ssl-certificate #f)
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(ssl-certificate-key #f)
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(server-name
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(apply append (map certificate-configuration-domains certificates)))
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(locations
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(filter identity
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(list
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(nginx-location-configuration
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(uri "/.well-known")
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(body (list (list "root " webroot ";"))))
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default-location))))))))
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(define certbot-service-type
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(service-type (name 'certbot)
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(extensions
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(list (service-extension nginx-service-type
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certbot-nginx-server-configurations)
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(service-extension activation-service-type
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certbot-activation)
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(service-extension mcron-service-type
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certbot-renewal-jobs)))
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(compose concatenate)
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(extend (lambda (config additional-certificates)
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(certbot-configuration
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(inherit config)
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(certificates
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(append
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(certbot-configuration-certificates config)
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additional-certificates)))))
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(description
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"Automatically renew @url{https://letsencrypt.org, Let's
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Encrypt} HTTPS certificates by adjusting the nginx web server configuration
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and periodically invoking @command{certbot}.")))
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