guix-kreyren/gnu/services/monitoring.scm
Ludovic Courtès 9d7248cd87
services: Add missing 'description' fields.
* gnu/services/databases.scm (postgresql-service-type)[description]: New field.
(memcached-service-type)[description]: New field.
(mysql-service-type)[description]: New field.
(redis-service-type)[description]: New field.
* gnu/services/desktop.scm (geoclue-service-type)[description]: New
field.
(udisks-service-type)[description]: New field.
(elogind-service-type)[description]: New field.
(account-service-type)[description]: New field.
* gnu/services/kerberos.scm (krb5-service-type)[description]: New field.
(pam-krb5-service-type)[description]: New field.
* gnu/services/lirc.scm (lirc-service-type)[description]: New field.
* gnu/services/mail.scm (dovecot-service-type)[description]: New field.
(opensmtpd-service-type)[description]: New field.
(mail-aliases-service-type)[description]: New field.
(exim-service-type)[description]: New field.
* gnu/services/monitoring.scm (zabbix-server-service-type)[description]:
New field.
(zabbix-agent-service-type)[description]: New field.
* gnu/services/nfs.scm (rpcbind-service-type)[description]: New field.
(pipefs-service-type)[description]: New field.
(gss-service-type)[description]: New field.
(idmap-service-type)[description]: New field.
* gnu/services/spice.scm (spice-vdagent-service-type)[description]: New field.
* gnu/services/sysctl.scm (sysctl-service-type)[description]: New field.
* gnu/services/virtualization.scm (libvirt-service-type)[description]:
New field.
(virtlog-service-type)[description]: New field.
* gnu/services/vpn.scm (openvpn-server-service-type)[description]: New field.
(openvpn-client-service-type)[description]: New field.
(wireguard-service-type)[description]: New field.
* gnu/services/web.scm (httpd-service-type)[description]: New field.
(fcgiwrap-service-type)[description]: New field.
(agate-service-type)[description]: New field.
[name]: Fix.
2022-04-29 18:07:16 +02:00

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Sou Bunnbu <iyzsong@member.fsf.org>
;;; Copyright © 2018, 2019 Gábor Boskovits <boskovits@gmail.com>
;;; Copyright © 2018, 2019, 2020 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2022 Marius Bakke <marius@gnu.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 configuration)
#:use-module (gnu services shepherd)
#:use-module (gnu services web)
#:use-module (gnu packages admin)
#:use-module (gnu packages monitoring)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (guix utils)
#:use-module ((guix ui) #:select (display-hint G_))
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-35)
#:export (darkstat-configuration
darkstat-service-type
prometheus-node-exporter-configuration
prometheus-node-exporter-configuration?
prometheus-node-exporter-configuration-package
prometheus-node-exporter-web-listen-address
prometheus-node-exporter-service-type
zabbix-server-configuration
zabbix-server-service-type
zabbix-agent-configuration
zabbix-agent-service-type
zabbix-front-end-configuration
zabbix-front-end-service-type
%zabbix-front-end-configuration-nginx))
;;;
;;; 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 statistics reports over
HTTP.")
(extensions
(list (service-extension account-service-type
(const %darkstat-accounts))
(service-extension shepherd-root-service-type
(compose list darkstat-shepherd-service))))))
;;;
;;; Prometheus node exporter
;;;
(define-record-type* <prometheus-node-exporter-configuration>
prometheus-node-exporter-configuration
make-prometheus-node-exporter-configuration
prometheus-node-exporter-configuration?
(package prometheus-node-exporter-configuration-package
(default go-github-com-prometheus-node-exporter))
(web-listen-address prometheus-node-exporter-web-listen-address
(default ":9100"))
(textfile-directory prometheus-node-exporter-textfile-directory
(default "/var/lib/prometheus/node-exporter"))
(extra-options prometheus-node-exporter-extra-options
(default '())))
(define %prometheus-node-exporter-accounts
(list (user-account
(name "prometheus-node-exporter")
(group "prometheus-node-exporter")
(system? #t)
(comment "Prometheus node exporter daemon user")
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin")))
(user-group
(name "prometheus-node-exporter")
(system? #t))))
(define prometheus-node-exporter-shepherd-service
(match-lambda
(( $ <prometheus-node-exporter-configuration>
package web-listen-address textfile-directory extra-options)
(list
(shepherd-service
(documentation "Prometheus node exporter.")
(provision '(prometheus-node-exporter))
(requirement '(networking))
(start #~(make-forkexec-constructor
(list #$(file-append package "/bin/node_exporter")
"--web.listen-address" #$web-listen-address
#$@(if textfile-directory
(list "--collector.textfile.directory"
textfile-directory)
'())
#$@extra-options)
#:user "prometheus-node-exporter"
#:group "prometheus-node-exporter"
#:log-file "/var/log/prometheus-node-exporter.log"))
(stop #~(make-kill-destructor)))))))
(define (prometheus-node-exporter-activation config)
(with-imported-modules '((guix build utils))
#~(let ((textfile-directory
#$(prometheus-node-exporter-textfile-directory config)))
(use-modules (guix build utils))
(when textfile-directory
(let ((user (getpw "prometheus-node-exporter")))
#t
(mkdir-p textfile-directory)
(chown textfile-directory (passwd:uid user) (passwd:gid user))
(chmod textfile-directory #o775))))))
(define prometheus-node-exporter-service-type
(service-type
(name 'prometheus-node-exporter)
(description
"Run @command{node_exporter} to serve hardware and OS metrics to
Prometheus.")
(extensions
(list
(service-extension account-service-type
(const %prometheus-node-exporter-accounts))
(service-extension activation-service-type
prometheus-node-exporter-activation)
(service-extension shepherd-root-service-type
prometheus-node-exporter-shepherd-service)))
(default-value (prometheus-node-exporter-configuration))))
;;;
;;; Zabbix server
;;;
(define (uglify-field-name field-name)
(apply string-append
(map (lambda (str)
(if (member (string->symbol str) '(ca db ssl))
(string-upcase str)
(string-capitalize str)))
(string-split (string-delete #\?
(symbol->string field-name))
#\-))))
(define (serialize-field field-name val)
#~(format #f "~a=~a~%" #$(uglify-field-name field-name) #$val))
(define (serialize-number field-name val)
(serialize-field field-name (number->string val)))
(define (serialize-list field-name val)
#~(if (null? '#$val)
""
#$(serialize-field field-name (string-join val ","))))
(define (serialize-string field-name val)
(if (and (string? val) (string=? val ""))
""
(serialize-field field-name val)))
(define group? string?)
(define serialize-group
(const ""))
(define include-files? list?)
(define (serialize-include-files field-name val)
#~(string-append #$@(map (cut serialize-field 'include <>) val)))
(define extra-options? string?)
(define (serialize-extra-options field-name val)
#~(if (= 0 (string-length #$val)) "" #$(format #f "~a~%" val)))
(define (nginx-server-configuration-list? val)
(and (list? val) (and-map nginx-server-configuration? val)))
(define (serialize-nginx-server-configuration-list field-name val)
"")
(define-configuration zabbix-server-configuration
(zabbix-server
(file-like zabbix-server)
"The zabbix-server package.")
(user
(string "zabbix")
"User who will run the Zabbix server.")
(group ;for zabbix-server-account procedure
(group "zabbix")
"Group who will run the Zabbix server.")
(db-host
(string "127.0.0.1")
"Database host name.")
(db-name
(string "zabbix")
"Database name.")
(db-user
(string "zabbix")
"Database user.")
(db-password
(string "")
"Database password. Please, use @code{include-files} with
@code{DBPassword=SECRET} inside a specified file instead.")
(db-port
(number 5432)
"Database port.")
(log-type
(string "")
"Specifies where log messages are written to:
@itemize
@item @code{system} - syslog.
@item @code{file} - file specified with @code{log-file} parameter.
@item @code{console} - standard output.
@end itemize\n")
(log-file
(string "/var/log/zabbix/server.log")
"Log file name for @code{log-type} @code{file} parameter.")
(pid-file
(string "/var/run/zabbix/zabbix_server.pid")
"Name of PID file.")
(ssl-ca-location
(string "/etc/ssl/certs/ca-certificates.crt")
"The location of certificate authority (CA) files for SSL server
certificate verification.")
(ssl-cert-location
(string "/etc/ssl/certs")
"Location of SSL client certificates.")
(extra-options
(extra-options "")
"Extra options will be appended to Zabbix server configuration file.")
(include-files
(include-files '())
"You may include individual files or all files in a directory in the
configuration file."))
(define (zabbix-server-account config)
"Return the user accounts and user groups for CONFIG."
(let ((zabbix-user (zabbix-server-configuration-user config))
(zabbix-group (zabbix-server-configuration-group config)))
(list (user-group (name zabbix-group) (system? #t))
(user-account
(name zabbix-user)
(system? #t)
(group zabbix-group)
(comment "zabbix privilege separation user")
(home-directory (string-append "/var/run/" zabbix-user))
(shell (file-append shadow "/sbin/nologin"))))))
(define (zabbix-server-config-file config)
"Return the zabbix-server configuration file corresponding to CONFIG."
(computed-file
"zabbix_server.conf"
#~(begin
(call-with-output-file #$output
(lambda (port)
(format port "# Generated by 'zabbix-server-service'.~%")
(format port #$(serialize-configuration
config zabbix-server-configuration-fields)))))))
(define (zabbix-server-activation config)
"Return the activation gexp for CONFIG."
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils)
(ice-9 rdelim))
(let ((user (getpw #$(zabbix-server-configuration-user config))))
(for-each (lambda (file)
(let ((directory (dirname file)))
(mkdir-p directory)
(chown directory (passwd:uid user) (passwd:gid user))
(chmod directory #o755)))
(list #$(zabbix-server-configuration-log-file config)
#$(zabbix-server-configuration-pid-file config)
"/etc/zabbix/maintenance.inc.php"))))))
(define (zabbix-server-runtime-control-procedure zabbix-server config command)
;; XXX: This is duplicated from mcron; factorize.
#~(lambda (_ . args)
;; Run 'zabbix_server' in a pipe so we can explicitly redirect its output
;; to 'current-output-port', which at this stage is bound to the client
;; connection.
(let ((pipe (apply open-pipe* OPEN_READ #$zabbix-server
"--config" #$config
"-R" #$command args)))
(let loop ()
(match (read-line pipe 'concat)
((? eof-object?)
(catch 'system-error
(lambda ()
(zero? (close-pipe pipe)))
(lambda args
;; There's a race with the SIGCHLD handler, which could
;; call 'waitpid' before 'close-pipe' above does. If we
;; get ECHILD, that means we lost the race; in that case, we
;; cannot tell what the exit code was (FIXME).
(or (= ECHILD (system-error-errno args))
(apply throw args)))))
(line
(display line)
(loop)))))))
;; Provide shepherd actions for common "zabbix_server -R" commands
;; mainly for a convenient way to use the correct configuration file.
(define (zabbix-server-actions zabbix-server config)
(list (shepherd-action
(name 'reload-config-cache)
(documentation "Reload the configuration cache.")
(procedure (zabbix-server-runtime-control-procedure
zabbix-server config "config_cache_reload")))
(shepherd-action
(name 'reload-snmp-cache)
(documentation "Reload SNMP cache.")
(procedure (zabbix-server-runtime-control-procedure
zabbix-server config "snmp_cache_reload")))))
(define (zabbix-server-shepherd-service config)
"Return a <shepherd-service> for Zabbix server with CONFIG."
(let ((zabbix-server
(file-append (zabbix-server-configuration-zabbix-server config)
"/sbin/zabbix_server"))
(config-file (zabbix-server-config-file config)))
(list (shepherd-service
(provision '(zabbix-server))
(requirement '(user-processes))
(documentation "Run the Zabbix server daemon.")
(actions (zabbix-server-actions zabbix-server config-file))
(start #~(make-forkexec-constructor
(list #$zabbix-server
"--config" #$config-file
"--foreground")
#:user #$(zabbix-server-configuration-user config)
#:group #$(zabbix-server-configuration-group config)
#:pid-file #$(zabbix-server-configuration-pid-file config)
#:environment-variables
(list "SSL_CERT_DIR=/run/current-system/profile\
/etc/ssl/certs"
"SSL_CERT_FILE=/run/current-system/profile\
/etc/ssl/certs/ca-certificates.crt")))
(stop #~(make-kill-destructor))))))
(define zabbix-server-service-type
(service-type
(name 'zabbix-server)
(extensions
(list (service-extension shepherd-root-service-type
zabbix-server-shepherd-service)
(service-extension account-service-type
zabbix-server-account)
(service-extension activation-service-type
zabbix-server-activation)))
(default-value (zabbix-server-configuration))
(description "Run the Zabbix server, a high-performance monitoring system
that can collect data about machines from a variety of sources and provide the
results in a Web interface.")))
(define (generate-zabbix-server-documentation)
(generate-documentation
`((zabbix-server-configuration
,zabbix-server-configuration-fields))
'zabbix-server-configuration))
(define-configuration zabbix-agent-configuration
(zabbix-agent
(file-like zabbix-agentd)
"The zabbix-agent package.")
(user
(string "zabbix")
"User who will run the Zabbix agent.")
(group
(group "zabbix")
"Group who will run the Zabbix agent.")
(hostname
(string "")
"Unique, case sensitive hostname which is required for active checks and
must match hostname as configured on the server.")
(log-type
(string "")
"Specifies where log messages are written to:
@itemize
@item @code{system} - syslog.
@item @code{file} - file specified with @code{log-file} parameter.
@item @code{console} - standard output.
@end itemize\n")
(log-file
(string "/var/log/zabbix/agent.log")
"Log file name for @code{log-type} @code{file} parameter.")
(pid-file
(string "/var/run/zabbix/zabbix_agent.pid")
"Name of PID file.")
(server
(list '("127.0.0.1"))
"List of IP addresses, optionally in CIDR notation, or hostnames of Zabbix
servers and Zabbix proxies. Incoming connections will be accepted only from
the hosts listed here.")
(server-active
(list '("127.0.0.1"))
"List of IP:port (or hostname:port) pairs of Zabbix servers and Zabbix
proxies for active checks. If port is not specified, default port is used.
If this parameter is not specified, active checks are disabled.")
(extra-options
(extra-options "")
"Extra options will be appended to Zabbix server configuration file.")
(include-files
(include-files '())
"You may include individual files or all files in a directory in the
configuration file."))
(define (zabbix-agent-account config)
"Return the user accounts and user groups for CONFIG."
(let ((zabbix-user (zabbix-agent-configuration-user config))
(zabbix-group (zabbix-agent-configuration-group config)))
(list (user-group (name zabbix-group) (system? #t))
(user-account
(name zabbix-user)
(system? #t)
(group zabbix-group)
(comment "zabbix privilege separation user")
(home-directory (string-append "/var/run/" zabbix-user))
(shell (file-append shadow "/sbin/nologin"))))))
(define (zabbix-agent-activation config)
"Return the activation gexp for CONFIG."
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils)
(ice-9 rdelim))
(let ((user
(getpw #$(zabbix-agent-configuration-user config))))
(for-each (lambda (file)
(let ((directory (dirname file)))
(mkdir-p directory)
(chown directory (passwd:uid user) (passwd:gid user))
(chmod directory #o755)))
(list #$(zabbix-agent-configuration-log-file config)
#$(zabbix-agent-configuration-pid-file config)))))))
(define (zabbix-agent-config-file config)
"Return the zabbix-agent configuration file corresponding to CONFIG."
(computed-file
"zabbix_agent.conf"
#~(begin
(call-with-output-file #$output
(lambda (port)
(format port "# Generated by 'zabbix-agent-service'.~%")
(format port #$(serialize-configuration
config zabbix-agent-configuration-fields)))))))
(define (zabbix-agent-shepherd-service config)
"Return a <shepherd-service> for Zabbix agent with CONFIG."
(list (shepherd-service
(provision '(zabbix-agent))
(requirement '(user-processes))
(documentation "Run Zabbix agent daemon.")
(start #~(make-forkexec-constructor
(list #$(file-append (zabbix-agent-configuration-zabbix-agent config)
"/sbin/zabbix_agentd")
"--config" #$(zabbix-agent-config-file config)
"--foreground")
#:user #$(zabbix-agent-configuration-user config)
#:group #$(zabbix-agent-configuration-group config)
#:pid-file #$(zabbix-agent-configuration-pid-file config)
#:environment-variables
(list "SSL_CERT_DIR=/run/current-system/profile\
/etc/ssl/certs"
"SSL_CERT_FILE=/run/current-system/profile\
/etc/ssl/certs/ca-certificates.crt"
"PATH=/run/setuid-programs:\
/run/current-system/profile/bin:/run/current-system/profile/sbin")))
(stop #~(make-kill-destructor)))))
(define zabbix-agent-service-type
(service-type
(name 'zabbix-agent)
(extensions
(list (service-extension shepherd-root-service-type
zabbix-agent-shepherd-service)
(service-extension account-service-type
zabbix-agent-account)
(service-extension activation-service-type
zabbix-agent-activation)))
(default-value (zabbix-agent-configuration))
(description "Run the Zabbix agent, @command{zabbix_agentd}, which gathers
information about the running system for the Zabbix monitoring server.")))
(define (generate-zabbix-agent-documentation)
(generate-documentation
`((zabbix-agent-configuration
,zabbix-agent-configuration-fields))
'zabbix-agent-configuration))
(define %zabbix-front-end-configuration-nginx
(nginx-server-configuration
(root #~(string-append #$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-extension config)
(match config
(($ <zabbix-front-end-configuration> _ server nginx)
(if (null? nginx)
(list
(nginx-server-configuration
(inherit %zabbix-front-end-configuration-nginx)
(root #~(string-append #$server:front-end "/share/zabbix/php"))))
nginx))))
(define-configuration zabbix-front-end-configuration
(zabbix-server
(file-like zabbix-server)
"The Zabbix server package to use.")
(nginx
(list '())
"List of @ref{nginx-server-configuration,@code{nginx-server-configuration}}
blocks for the Zabbix front-end. When empty, a default that listens on port 80
is used.")
(db-host
(string "localhost")
"Database host name.")
(db-port
(number 5432)
"Database port.")
(db-name
(string "zabbix")
"Database name.")
(db-user
(string "zabbix")
"Database user.")
(db-password
(string "")
"Database password. Please, use @code{db-secret-file} instead.")
(db-secret-file
(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.")
(zabbix-host
(string "localhost")
"Zabbix server hostname.")
(zabbix-port
(number 10051)
"Zabbix server port."))
(define (zabbix-front-end-config config)
(match-record config <zabbix-front-end-configuration>
(%location db-host db-port db-name db-user db-password db-secret-file
zabbix-host zabbix-port)
(mixed-text-file "zabbix.conf.php"
"\
<?php
// Zabbix GUI configuration file.
global $DB;
$DB['TYPE'] = 'POSTGRESQL';
$DB['SERVER'] = '" db-host "';
$DB['PORT'] = '" (number->string db-port) "';
$DB['DATABASE'] = '" db-name "';
$DB['USER'] = '" db-user "';
$DB['PASSWORD'] = " (let ((file (location-file %location))
(line (location-line %location))
(column (location-column %location)))
(if (string-null? db-password)
(if (string-null? db-secret-file)
(raise (make-compound-condition
(condition
(&message
(message
(format #f "no '~A' or '~A' field in your '~A' record"
'db-secret-file 'db-password
'zabbix-front-end-configuration))))
(condition
(&error-location
(location %location)))))
(string-append "trim(file_get_contents('"
db-secret-file "'));\n"))
(begin
(display-hint (format #f (G_ "~a:~a:~a: ~a:
Consider using @code{db-secret-file} instead of @code{db-password} for better
security.") file line column 'zabbix-front-end-configuration))
(format #f "'~a';~%" db-password))))
"
// Schema name. Used for IBM DB2 and PostgreSQL.
$DB['SCHEMA'] = '';
// Use IEEE754 compatible value range for 64-bit Numeric (float) history values.
$DB['DOUBLE_IEEE754'] = true;
$ZBX_SERVER = '" zabbix-host "';
$ZBX_SERVER_PORT = '" (number->string zabbix-port) "';
$ZBX_SERVER_NAME = '';
$IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
")))
(define %maintenance.inc.php
;; Empty php file to allow us move zabbix-frontend configs to /etc/zabbix
;; directory. See install-front-end phase in
;; (@ (gnu packages monitoring) zabbix-server) package.
"\
<?php
")
(define (zabbix-front-end-activation config)
"Return the activation gexp for CONFIG."
#~(begin
(use-modules (guix build utils))
(mkdir-p "/etc/zabbix")
(call-with-output-file "/etc/zabbix/maintenance.inc.php"
(lambda (port)
(display #$%maintenance.inc.php port)))
(copy-file #$(zabbix-front-end-config config)
"/etc/zabbix/zabbix.conf.php")))
(define zabbix-front-end-service-type
(service-type
(name 'zabbix-front-end)
(extensions
(list (service-extension activation-service-type
zabbix-front-end-activation)
(service-extension nginx-service-type
zabbix-front-end-nginx-extension)
;; Make sure php-fpm is instantiated.
(service-extension php-fpm-service-type
(const #t))))
(default-value (zabbix-front-end-configuration))
(description
"Run the zabbix-front-end web interface, which allows users to interact
with Zabbix server.")))
(define (generate-zabbix-front-end-documentation)
(generate-documentation
`((zabbix-front-end-configuration
,zabbix-front-end-configuration-fields))
'zabbix-front-end-configuration))