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07/11: services: certbot: Associate one certificate with several domains


From: Clément Lassieur
Subject: 07/11: services: certbot: Associate one certificate with several domains.
Date: Thu, 22 Feb 2018 15:44:41 -0500 (EST)

snape pushed a commit to branch master
in repository guix.

commit c3215d2f9d8fa4b890e3a41ceb4404b76a7c5c49
Author: Clément Lassieur <address@hidden>
Date:   Sat Feb 10 17:20:22 2018 +0100

    services: certbot: Associate one certificate with several domains.
    
    * doc/guix.texi (Certificate Services): Document 
<certificate-configuration>,
    the change from domains to certificates and the fact that their path is now
    derived from their name.
    * gnu/services/certbot.scm (<certificate-configuration>): Add and export it.
    (certbot-configuration, certbot-command, certbot-activation,
    certbot-nginx-server-configurations, certbot-service-type): Replace 
'domains'
    with 'certificates'.
    (certbot-nginx-server-configurations): Use only one 
nginx-server-configuration
    and use all certificate domains as the server-name.
---
 doc/guix.texi            | 48 ++++++++++++++++++++++++++------
 gnu/services/certbot.scm | 71 ++++++++++++++++++++++++++++--------------------
 2 files changed, 81 insertions(+), 38 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 241d41b..6db58c7 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -15746,7 +15746,22 @@ can be found there:
 @url{https://acme-v01.api.letsencrypt.org/directory}.
 
 @defvr {Scheme Variable} certbot-service-type
-A service type for the @code{certbot} Let's Encrypt client.
+A service type for the @code{certbot} Let's Encrypt client.  Its value
+must be a @code{certbot-configuration} record as in this example:
+
address@hidden
+(service certbot-service-type
+         (certbot-configuration
+          (email "foo@@example.net")
+          (certificates
+           (list
+            (certificate-configuration
+             (domains '("example.net" "www.example.net")))
+            (certificate-configuration
+             (domains '("bar.example.net")))))))
address@hidden example
+
+See below for details about @code{certbot-configuration}.
 @end defvr
 
 @deftp {Data Type} certbot-configuration
@@ -15761,9 +15776,10 @@ The certbot package to use.
 The directory from which to serve the Let's Encrypt challenge/response
 files.
 
address@hidden @code{domains} (default: @code{()})
-A list of domains for which to generate certificates and request
-signatures.
address@hidden @code{certificates} (default: @code{()})
+A list of @code{certificates-configuration}s for which to generate
+certificates and request signatures.  Each certificate has a @code{name}
+and several @code{domains}.
 
 @item @code{email}
 Mandatory email used for registration, recovery contact, and important
@@ -15791,12 +15807,28 @@ Pass @code{#f} to not issue a default location.
 @end table
 @end deftp
 
-The public key and its signatures will be written to
address@hidden/etc/letsencrypt/live/@var{domain}/fullchain.pem}, for each
address@hidden in the configuration.  The private key is written to
address@hidden/etc/letsencrypt/live/@var{domain}/privkey.pem}.
address@hidden {Data Type} certificate-configuration
+Data type representing the configuration of a certificate.
+This type has the following parameters:
+
address@hidden @asis
address@hidden @code{name} (default: @i{see below})
+This name is used by Certbot for housekeeping and in file paths; it
+doesn't affect the content of the certificate itself.  To see
+certificate names, run @code{certbot certificates}.
+
+Its default is the first provided domain.
 
address@hidden @code{domains} (default: @code{()})
+The first domain provided will be the subject CN of the certificate, and
+all domains will be Subject Alternative Names on the certificate.
+
address@hidden table
address@hidden deftp
 
+For each @code{certificate-configuration}, the certificate is saved to
address@hidden/etc/letsencrypt/live/@var{name}/fullchain.pem} and the key is
+saved to @code{/etc/letsencrypt/live/@var{name}/privkey.pem}.
 @node DNS Services
 @subsubsection DNS Services
 @cindex DNS (domain name system)
diff --git a/gnu/services/certbot.scm b/gnu/services/certbot.scm
index 379c211..a70a365 100644
--- a/gnu/services/certbot.scm
+++ b/gnu/services/certbot.scm
@@ -32,7 +32,8 @@
   #:use-module (ice-9 match)
   #:export (certbot-service-type
             certbot-configuration
-            certbot-configuration?))
+            certbot-configuration?
+            certificate-configuration))
 
 ;;; Commentary:
 ;;;
@@ -41,6 +42,14 @@
 ;;; Code:
 
 
+(define-record-type* <certificate-configuration>
+  certificate-configuration make-certificate-configuration
+  certificate-configuration?
+  (name                certificate-configuration-name
+                       (default #f))
+  (domains             certificate-configuration-domains
+                       (default '())))
+
 (define-record-type* <certbot-configuration>
   certbot-configuration make-certbot-configuration
   certbot-configuration?
@@ -48,7 +57,7 @@
                        (default certbot))
   (webroot             certbot-configuration-webroot
                        (default "/var/www"))
-  (domains             certbot-configuration-domains
+  (certificates        certbot-configuration-certificates
                        (default '()))
   (email               certbot-configuration-email)
   (default-location    certbot-configuration-default-location
@@ -60,17 +69,19 @@
 
 (define certbot-command
   (match-lambda
-    (($ <certbot-configuration> package webroot domains email
+    (($ <certbot-configuration> package webroot certificates email
                                 default-location)
      (let* ((certbot (file-append package "/bin/certbot"))
             (commands
              (map
-              (lambda (domain)
-                (list certbot "certonly" "-n" "--agree-tos"
-                      "-m" email
-                      "--webroot" "-w" webroot
-                      "-d" domain))
-              domains)))
+              (match-lambda
+                (($ <certificate-configuration> name domains)
+                 (list certbot "certonly" "-n" "--agree-tos"
+                       "-m" email
+                       "--webroot" "-w" webroot
+                       "--cert-name" (or name (car domains))
+                       "-d" (string-join domains ","))))
+              certificates)))
        (program-file
         "certbot-command"
         #~(let ((code 0))
@@ -88,7 +99,7 @@
 
 (define (certbot-activation config)
   (match config
-    (($ <certbot-configuration> package webroot domains email
+    (($ <certbot-configuration> package webroot certificates email
                                 default-location)
      (with-imported-modules '((guix build utils))
        #~(begin
@@ -98,23 +109,22 @@
 
 (define certbot-nginx-server-configurations
   (match-lambda
-    (($ <certbot-configuration> package webroot domains email
+    (($ <certbot-configuration> package webroot certificates email
                                 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))))
+     (list
+      (nginx-server-configuration
+       (listen '("80" "[::]:80"))
+       (ssl-certificate #f)
+       (ssl-certificate-key #f)
+       (server-name
+        (apply append (map certificate-configuration-domains certificates)))
+       (locations
+        (filter identity
+                (list
+                 (nginx-location-configuration
+                  (uri "/.well-known")
+                  (body (list (list "root " webroot ";"))))
+                 default-location))))))))
 
 (define certbot-service-type
   (service-type (name 'certbot)
@@ -126,12 +136,13 @@
                        (service-extension mcron-service-type
                                           certbot-renewal-jobs)))
                 (compose concatenate)
-                (extend (lambda (config additional-domains)
+                (extend (lambda (config additional-certificates)
                           (certbot-configuration
                            (inherit config)
-                           (domains (append
-                                     (certbot-configuration-domains config)
-                                     additional-domains)))))
+                           (certificates
+                            (append
+                             (certbot-configuration-certificates config)
+                             additional-certificates)))))
                 (description
                  "Automatically renew @url{https://letsencrypt.org, Let's
 Encrypt} HTTPS certificates by adjusting the nginx web server configuration



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