services: zabbix-frontend: Support custom server package.

* gnu/services/monitoring.scm (%zabbix-front-end-configuration-nginx): Rename
to ...
(zabbix-front-end-nginx-configuration): ... this.  Take server package and
FastCGI parameters from ...
(zabbix-front-end-configuration): ... here.  Add PACKAGE and FASTCGI-PARAMS
fields, remove NGINX.
(zabbix-front-end-service-type): Adjust for renamed procedure.
* doc/guix.texi (Monitoring Services)[Zabbix front-end]: Regenerate documentation.

2 files changed, 52 insertions, 71 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 10248d29e7..1a6c364ac8 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -47,7 +47,7 @@ Copyright @copyright{} 2017, 2018 Carlo Zancanaro@*
 Copyright @copyright{} 2017 Thomas Danckaert@*
 Copyright @copyright{} 2017 humanitiesNerd@*
 Copyright @copyright{} 2017, 2021 Christine Lemmer-Webber@*
-Copyright @copyright{} 2017, 2018, 2019, 2020, 2021 Marius Bakke@*
+Copyright @copyright{} 2017, 2018, 2019, 2020, 2021, 2022 Marius Bakke@*
 Copyright @copyright{} 2017, 2019, 2020 Hartmut Goebel@*
 Copyright @copyright{} 2017, 2019, 2020, 2021 Maxim Cournoyer@*
 Copyright @copyright{} 2017–2022 Tobias Geerinckx-Rice@*
@@ -25797,71 +25797,46 @@ This service provides a WEB interface to Zabbix server.
 
 @c %start of fragment
 
+@deftp {Data Type} zabbix-front-end-configuration
 Available @code{zabbix-front-end-configuration} fields are:
 
-@deftypevr {@code{zabbix-front-end-configuration} parameter} nginx-server-configuration-list nginx
-NGINX configuration.
+@table @asis
+@item @code{zabbix-server} (default: @code{zabbix-server}) (type: file-like)
+The Zabbix server package to use.
 
-@end deftypevr
+@item @code{fastcgi-params} (type: list)
+List of FastCGI parameter pairs that will be included in the NGINX
+configuration.
 
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string db-host
+@item @code{db-host} (default: @code{\"localhost\"}) (type: string)
 Database host name.
 
-Defaults to @samp{"localhost"}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} number db-port
+@item @code{db-port} (default: @code{5432}) (type: number)
 Database port.
 
-Defaults to @samp{5432}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string db-name
+@item @code{db-name} (default: @code{\"zabbix\"}) (type: string)
 Database name.
 
-Defaults to @samp{"zabbix"}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string db-user
+@item @code{db-user} (default: @code{\"zabbix\"}) (type: string)
 Database user.
 
-Defaults to @samp{"zabbix"}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string db-password
+@item @code{db-password} (default: @code{\"\"}) (type: string)
 Database password.  Please, use @code{db-secret-file} instead.
 
-Defaults to @samp{""}.
-
-@end deftypevr
+@item @code{db-secret-file} (default: @code{\"\"}) (type: string)
+Secret file which will be appended to @file{zabbix.conf.php} file.  This
+file contains credentials for use by Zabbix front-end.  You are expected
+to create it manually.
 
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string db-secret-file
-Secret file containing the credentials for the Zabbix front-end.  The value
-must be a local file name, not a G-expression.  You are expected to create
-this file manually.  Its contents will be copied into @file{zabbix.conf.php}
-as the value of @code{$DB['PASSWORD']}.
-
-Defaults to @samp{""}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} string zabbix-host
+@item @code{zabbix-host} (default: @code{\"localhost\"}) (type: string)
 Zabbix server hostname.
 
-Defaults to @samp{"localhost"}.
-
-@end deftypevr
-
-@deftypevr {@code{zabbix-front-end-configuration} parameter} number zabbix-port
+@item @code{zabbix-port} (default: @code{10051}) (type: number)
 Zabbix server port.
 
-Defaults to @samp{10051}.
+@end table
 
-@end deftypevr
+@end deftp
 
 
 @c %end of fragment
diff --git a/gnu/services/monitoring.scm b/gnu/services/monitoring.scm
index 398fe0bb8b..fb893d87cd 100644
--- a/gnu/services/monitoring.scm
+++ b/gnu/services/monitoring.scm
@@ -50,8 +50,7 @@
             zabbix-agent-configuration
             zabbix-agent-service-type
             zabbix-front-end-configuration
-            zabbix-front-end-service-type
-            %zabbix-front-end-configuration-nginx))
+            zabbix-front-end-service-type))
 
 
 ;;;
@@ -552,30 +551,37 @@ configuration file."))
       ,zabbix-agent-configuration-fields))
    'zabbix-agent-configuration))
 
-(define %zabbix-front-end-configuration-nginx
-  (nginx-server-configuration
-   (root #~(string-append #$zabbix-server:front-end "/share/zabbix/php"))
-   (index '("index.php"))
-   (locations
-    (let ((php-location (nginx-php-location)))
-      (list (nginx-location-configuration
-             (inherit php-location)
-             (body (append (nginx-location-configuration-body php-location)
-                           (list "
-fastcgi_param PHP_VALUE \"post_max_size = 16M
-                          max_execution_time = 300\";
-")))))))
-   (listen '("80"))))
+(define zabbix-front-end-nginx-configuration
+  (match-lambda
+    (($ <zabbix-front-end-configuration> _ package fastcgi-params)
+     (list
+      (nginx-server-configuration
+       (root #~(string-append #$package:front-end "/share/zabbix/php"))
+       (index '("index.php"))
+       (locations
+        (let ((php-location (nginx-php-location)))
+          (list (nginx-location-configuration
+                 (inherit php-location)
+                 (body
+                  (append (nginx-location-configuration-body php-location)
+                          (list
+                           (format #f "fastcgi_param PHP_VALUE \"~a\";"
+                                   (string-join
+                                    (map (match-lambda
+                                           ((key . value)
+                                            (format #f "~a = ~a~%"
+                                                    key value)))
+                                         fastcgi-params))))))))))
+       (listen '("80")))))))
 
 (define-configuration zabbix-front-end-configuration
-  ;; TODO: Specify zabbix front-end package.
-  ;; (zabbix-
-  ;;  (file-like zabbix-front-end)
-  ;;  "The zabbix-front-end package.")
-  (nginx
-   (nginx-server-configuration-list
-    (list %zabbix-front-end-configuration-nginx))
-   "NGINX configuration.")
+  (zabbix-server
+    (file-like zabbix-server)
+    "The Zabbix server package to use.")
+  (fastcgi-params
+   (list '(("post_max_size" . "16M")
+           ("max_execution_time" . "300")))
+   "List of FastCGI parameter pairs that will be included in the NGINX configuration.")
   (db-host
    (string "localhost")
    "Database host name.")
@@ -680,7 +686,7 @@ $IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
     (list (service-extension activation-service-type
                              zabbix-front-end-activation)
           (service-extension nginx-service-type
-                             zabbix-front-end-configuration-nginx)
+                             zabbix-front-end-nginx-configuration)
           ;; Make sure php-fpm is instantiated.
           (service-extension php-fpm-service-type
                              (const #t))))