706 lines
26 KiB
Scheme
706 lines
26 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018 Sou Bunnbu <iyzsong@member.fsf.org>
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;;; Copyright © 2018, 2019 Gábor Boskovits <boskovits@gmail.com>
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;;; Copyright © 2018, 2019, 2020 Oleg Pykhalov <go.wigust@gmail.com>
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;;; Copyright © 2022 Marius Bakke <marius@gnu.org>
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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 monitoring)
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#:use-module (gnu services)
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#:use-module (gnu services configuration)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services web)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages monitoring)
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#:use-module (gnu system shadow)
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#:use-module (guix gexp)
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#:use-module (guix packages)
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#:use-module (guix records)
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#:use-module (guix utils)
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#:use-module ((guix ui) #:select (display-hint G_))
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#:use-module (ice-9 match)
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#:use-module (ice-9 rdelim)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-35)
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#:export (darkstat-configuration
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darkstat-service-type
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prometheus-node-exporter-configuration
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prometheus-node-exporter-configuration?
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prometheus-node-exporter-configuration-package
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prometheus-node-exporter-web-listen-address
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prometheus-node-exporter-service-type
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zabbix-server-configuration
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zabbix-server-service-type
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zabbix-agent-configuration
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zabbix-agent-service-type
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zabbix-front-end-configuration
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zabbix-front-end-service-type
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%zabbix-front-end-configuration-nginx))
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;;;
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;;; darkstat
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;;;
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(define-record-type* <darkstat-configuration>
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darkstat-configuration make-darkstat-configuration darkstat-configuration?
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(package darkstat-configuration-package
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(default darkstat))
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(interface darkstat-configuration-interface)
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(port darkstat-configuration-port
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(default "667"))
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(bind-address darkstat-configuration-bind-address
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(default "127.0.0.1"))
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(base darkstat-configuration-base
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(default "/")))
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(define %darkstat-accounts
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(list (user-account
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(name "darkstat")
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(group "darkstat")
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(system? #t)
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(comment "darkstat daemon user")
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(home-directory "/var/lib/darkstat")
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(shell (file-append shadow "/sbin/nologin")))
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(user-group
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(name "darkstat")
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(system? #t))))
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(define darkstat-shepherd-service
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(match-lambda
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(($ <darkstat-configuration>
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package interface port bind-address base)
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(shepherd-service
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(documentation "Network statistics gatherer.")
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(provision '(darkstat))
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(requirement '(networking))
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(start #~(make-forkexec-constructor
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(list #$(file-append package "/sbin/darkstat")
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"-i" #$interface
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"-p" #$port
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"-b" #$bind-address
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"--base" #$base
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"--syslog" "--no-daemon"
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"--chroot" "/var/lib/darkstat"
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"--user" "darkstat"
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"--import" "darkstat.db"
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"--export" "darkstat.db")))
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(stop #~(make-kill-destructor))))))
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(define darkstat-service-type
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(service-type
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(name 'darkstat)
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(description
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"Run @command{darkstat} to serve network traffic statistics reports over
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HTTP.")
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(extensions
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(list (service-extension account-service-type
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(const %darkstat-accounts))
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(service-extension shepherd-root-service-type
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(compose list darkstat-shepherd-service))))))
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;;;
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;;; Prometheus node exporter
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;;;
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(define-record-type* <prometheus-node-exporter-configuration>
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prometheus-node-exporter-configuration
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make-prometheus-node-exporter-configuration
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prometheus-node-exporter-configuration?
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(package prometheus-node-exporter-configuration-package
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(default go-github-com-prometheus-node-exporter))
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(web-listen-address prometheus-node-exporter-web-listen-address
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(default ":9100"))
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(textfile-directory prometheus-node-exporter-textfile-directory
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(default "/var/lib/prometheus/node-exporter"))
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(extra-options prometheus-node-exporter-extra-options
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(default '())))
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(define %prometheus-node-exporter-accounts
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(list (user-account
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(name "prometheus-node-exporter")
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(group "prometheus-node-exporter")
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(system? #t)
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(comment "Prometheus node exporter daemon user")
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))
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(user-group
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(name "prometheus-node-exporter")
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(system? #t))))
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(define prometheus-node-exporter-shepherd-service
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(match-lambda
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(( $ <prometheus-node-exporter-configuration>
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package web-listen-address textfile-directory extra-options)
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(list
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(shepherd-service
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(documentation "Prometheus node exporter.")
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(provision '(prometheus-node-exporter))
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(requirement '(networking))
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(start #~(make-forkexec-constructor
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(list #$(file-append package "/bin/node_exporter")
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"--web.listen-address" #$web-listen-address
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#$@(if textfile-directory
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(list "--collector.textfile.directory"
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textfile-directory)
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'())
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#$@extra-options)
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#:user "prometheus-node-exporter"
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#:group "prometheus-node-exporter"
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#:log-file "/var/log/prometheus-node-exporter.log"))
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(stop #~(make-kill-destructor)))))))
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(define (prometheus-node-exporter-activation config)
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(with-imported-modules '((guix build utils))
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#~(let ((textfile-directory
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#$(prometheus-node-exporter-textfile-directory config)))
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(use-modules (guix build utils))
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(when textfile-directory
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(let ((user (getpw "prometheus-node-exporter")))
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#t
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(mkdir-p textfile-directory)
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(chown textfile-directory (passwd:uid user) (passwd:gid user))
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(chmod textfile-directory #o775))))))
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(define prometheus-node-exporter-service-type
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(service-type
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(name 'prometheus-node-exporter)
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(description
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"Run @command{node_exporter} to serve hardware and OS metrics to
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Prometheus.")
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(extensions
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(list
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(service-extension account-service-type
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(const %prometheus-node-exporter-accounts))
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(service-extension activation-service-type
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prometheus-node-exporter-activation)
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(service-extension shepherd-root-service-type
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prometheus-node-exporter-shepherd-service)))
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(default-value (prometheus-node-exporter-configuration))))
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;;;
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;;; Zabbix server
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;;;
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(define (uglify-field-name field-name)
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(apply string-append
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(map (lambda (str)
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(if (member (string->symbol str) '(ca db ssl))
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(string-upcase str)
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(string-capitalize str)))
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(string-split (string-delete #\?
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(symbol->string field-name))
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#\-))))
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(define (serialize-field field-name val)
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#~(format #f "~a=~a~%" #$(uglify-field-name field-name) #$val))
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(define (serialize-number field-name val)
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(serialize-field field-name (number->string val)))
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(define (serialize-list field-name val)
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#~(if (null? '#$val)
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""
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#$(serialize-field field-name (string-join val ","))))
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(define (serialize-string field-name val)
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(if (and (string? val) (string=? val ""))
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""
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(serialize-field field-name val)))
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(define group? string?)
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(define serialize-group
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(const ""))
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(define include-files? list?)
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(define (serialize-include-files field-name val)
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#~(string-append #$@(map (cut serialize-field 'include <>) val)))
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(define extra-options? string?)
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(define (serialize-extra-options field-name val)
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#~(if (= 0 (string-length #$val)) "" #$(format #f "~a~%" val)))
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(define (nginx-server-configuration-list? val)
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(and (list? val) (and-map nginx-server-configuration? val)))
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(define (serialize-nginx-server-configuration-list field-name val)
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"")
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(define-configuration zabbix-server-configuration
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(zabbix-server
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(file-like zabbix-server)
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"The zabbix-server package.")
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(user
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(string "zabbix")
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"User who will run the Zabbix server.")
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(group ;for zabbix-server-account procedure
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(group "zabbix")
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"Group who will run the Zabbix server.")
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(db-host
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(string "127.0.0.1")
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"Database host name.")
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(db-name
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(string "zabbix")
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"Database name.")
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(db-user
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(string "zabbix")
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"Database user.")
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(db-password
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(string "")
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"Database password. Please, use @code{include-files} with
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@code{DBPassword=SECRET} inside a specified file instead.")
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(db-port
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(number 5432)
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"Database port.")
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(log-type
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(string "")
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"Specifies where log messages are written to:
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@itemize
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@item @code{system} - syslog.
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@item @code{file} - file specified with @code{log-file} parameter.
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@item @code{console} - standard output.
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@end itemize\n")
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(log-file
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(string "/var/log/zabbix/server.log")
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"Log file name for @code{log-type} @code{file} parameter.")
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(pid-file
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(string "/var/run/zabbix/zabbix_server.pid")
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"Name of PID file.")
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(ssl-ca-location
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(string "/etc/ssl/certs/ca-certificates.crt")
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"The location of certificate authority (CA) files for SSL server
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certificate verification.")
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(ssl-cert-location
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(string "/etc/ssl/certs")
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"Location of SSL client certificates.")
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(extra-options
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(extra-options "")
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"Extra options will be appended to Zabbix server configuration file.")
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(include-files
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(include-files '())
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"You may include individual files or all files in a directory in the
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configuration file."))
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(define (zabbix-server-account config)
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"Return the user accounts and user groups for CONFIG."
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(let ((zabbix-user (zabbix-server-configuration-user config))
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(zabbix-group (zabbix-server-configuration-group config)))
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(list (user-group (name zabbix-group) (system? #t))
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(user-account
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(name zabbix-user)
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(system? #t)
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(group zabbix-group)
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(comment "zabbix privilege separation user")
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(home-directory (string-append "/var/run/" zabbix-user))
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(shell (file-append shadow "/sbin/nologin"))))))
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(define (zabbix-server-config-file config)
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"Return the zabbix-server configuration file corresponding to CONFIG."
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(computed-file
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"zabbix_server.conf"
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#~(begin
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(call-with-output-file #$output
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(lambda (port)
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(format port "# Generated by 'zabbix-server-service'.~%")
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(format port #$(serialize-configuration
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config zabbix-server-configuration-fields)))))))
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(define (zabbix-server-activation config)
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"Return the activation gexp for CONFIG."
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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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(ice-9 rdelim))
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(let ((user (getpw #$(zabbix-server-configuration-user config))))
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(for-each (lambda (file)
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(let ((directory (dirname file)))
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(mkdir-p directory)
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(chown directory (passwd:uid user) (passwd:gid user))
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(chmod directory #o755)))
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(list #$(zabbix-server-configuration-log-file config)
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#$(zabbix-server-configuration-pid-file config)
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"/etc/zabbix/maintenance.inc.php"))))))
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(define (zabbix-server-runtime-control-procedure zabbix-server config command)
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;; XXX: This is duplicated from mcron; factorize.
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#~(lambda (_ . args)
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;; Run 'zabbix_server' in a pipe so we can explicitly redirect its output
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;; to 'current-output-port', which at this stage is bound to the client
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;; connection.
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(let ((pipe (apply open-pipe* OPEN_READ #$zabbix-server
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"--config" #$config
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"-R" #$command args)))
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(let loop ()
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(match (read-line pipe 'concat)
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((? eof-object?)
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(catch 'system-error
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(lambda ()
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(zero? (close-pipe pipe)))
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(lambda args
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;; There's a race with the SIGCHLD handler, which could
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;; call 'waitpid' before 'close-pipe' above does. If we
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;; get ECHILD, that means we lost the race; in that case, we
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;; cannot tell what the exit code was (FIXME).
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(or (= ECHILD (system-error-errno args))
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(apply throw args)))))
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(line
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(display line)
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(loop)))))))
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;; Provide shepherd actions for common "zabbix_server -R" commands
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;; mainly for a convenient way to use the correct configuration file.
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(define (zabbix-server-actions zabbix-server config)
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(list (shepherd-action
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(name 'reload-config-cache)
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(documentation "Reload the configuration cache.")
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(procedure (zabbix-server-runtime-control-procedure
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zabbix-server config "config_cache_reload")))
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(shepherd-action
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(name 'reload-snmp-cache)
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(documentation "Reload SNMP cache.")
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(procedure (zabbix-server-runtime-control-procedure
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zabbix-server config "snmp_cache_reload")))))
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(define (zabbix-server-shepherd-service config)
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"Return a <shepherd-service> for Zabbix server with CONFIG."
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(let ((zabbix-server
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(file-append (zabbix-server-configuration-zabbix-server config)
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"/sbin/zabbix_server"))
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(config-file (zabbix-server-config-file config)))
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(list (shepherd-service
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(provision '(zabbix-server))
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(documentation "Run the Zabbix server daemon.")
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(actions (zabbix-server-actions zabbix-server config-file))
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(start #~(make-forkexec-constructor
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(list #$zabbix-server
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"--config" #$config-file
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"--foreground")
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#:user #$(zabbix-server-configuration-user config)
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#:group #$(zabbix-server-configuration-group config)
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#:pid-file #$(zabbix-server-configuration-pid-file config)
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#:environment-variables
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(list "SSL_CERT_DIR=/run/current-system/profile\
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/etc/ssl/certs"
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"SSL_CERT_FILE=/run/current-system/profile\
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/etc/ssl/certs/ca-certificates.crt")))
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(stop #~(make-kill-destructor))))))
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(define zabbix-server-service-type
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(service-type
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(name 'zabbix-server)
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(extensions
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(list (service-extension shepherd-root-service-type
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zabbix-server-shepherd-service)
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(service-extension account-service-type
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zabbix-server-account)
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(service-extension activation-service-type
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zabbix-server-activation)))
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(default-value (zabbix-server-configuration))))
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(define (generate-zabbix-server-documentation)
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(generate-documentation
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`((zabbix-server-configuration
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,zabbix-server-configuration-fields))
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'zabbix-server-configuration))
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(define-configuration zabbix-agent-configuration
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(zabbix-agent
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(file-like zabbix-agentd)
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"The zabbix-agent package.")
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(user
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(string "zabbix")
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"User who will run the Zabbix agent.")
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(group
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(group "zabbix")
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"Group who will run the Zabbix agent.")
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(hostname
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(string "")
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"Unique, case sensitive hostname which is required for active checks and
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must match hostname as configured on the server.")
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(log-type
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(string "")
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"Specifies where log messages are written to:
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@itemize
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@item @code{system} - syslog.
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@item @code{file} - file specified with @code{log-file} parameter.
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@item @code{console} - standard output.
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@end itemize\n")
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(log-file
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(string "/var/log/zabbix/agent.log")
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"Log file name for @code{log-type} @code{file} parameter.")
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(pid-file
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(string "/var/run/zabbix/zabbix_agent.pid")
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"Name of PID file.")
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(server
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(list '("127.0.0.1"))
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"List of IP addresses, optionally in CIDR notation, or hostnames of Zabbix
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servers and Zabbix proxies. Incoming connections will be accepted only from
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the hosts listed here.")
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(server-active
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(list '("127.0.0.1"))
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"List of IP:port (or hostname:port) pairs of Zabbix servers and Zabbix
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proxies for active checks. If port is not specified, default port is used.
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If this parameter is not specified, active checks are disabled.")
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(extra-options
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(extra-options "")
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"Extra options will be appended to Zabbix server configuration file.")
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(include-files
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(include-files '())
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"You may include individual files or all files in a directory in the
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configuration file."))
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(define (zabbix-agent-account config)
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"Return the user accounts and user groups for CONFIG."
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(let ((zabbix-user (zabbix-agent-configuration-user config))
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(zabbix-group (zabbix-agent-configuration-group config)))
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(list (user-group (name zabbix-group) (system? #t))
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(user-account
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(name zabbix-user)
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(system? #t)
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(group zabbix-group)
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(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))
|
||
(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 #$(zabbix-agent-configuration-pid-file config)
|
||
#:environment-variables
|
||
(list "SSL_CERT_DIR=/run/current-system/profile\
|
||
/etc/ssl/certs"
|
||
"SSL_CERT_FILE=/run/current-system/profile\
|
||
/etc/ssl/certs/ca-certificates.crt"
|
||
"PATH=/run/setuid-programs:\
|
||
/run/current-system/profile/bin:/run/current-system/profile/sbin")))
|
||
(stop #~(make-kill-destructor)))))
|
||
|
||
(define zabbix-agent-service-type
|
||
(service-type
|
||
(name 'zabbix-agent)
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
zabbix-agent-shepherd-service)
|
||
(service-extension account-service-type
|
||
zabbix-agent-account)
|
||
(service-extension activation-service-type
|
||
zabbix-agent-activation)))
|
||
(default-value (zabbix-agent-configuration))))
|
||
|
||
(define (generate-zabbix-agent-documentation)
|
||
(generate-documentation
|
||
`((zabbix-agent-configuration
|
||
,zabbix-agent-configuration-fields))
|
||
'zabbix-agent-configuration))
|
||
|
||
(define %zabbix-front-end-configuration-nginx
|
||
(nginx-server-configuration
|
||
(root #~(string-append #$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 @pxref{NGINX, @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))
|