1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
;;;
;;; 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 admin)
#:use-module (gnu packages admin)
#:use-module (gnu services)
#:use-module (gnu services mcron)
#:use-module (gnu services shepherd)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (ice-9 vlist)
#:export (%default-rotations
%rotated-files
log-rotation
log-rotation?
log-rotation-frequency
log-rotation-files
log-rotation-options
log-rotation-post-rotate
rottlog-configuration
rottlog-configuration?
rottlog-service
rottlog-service-type))
;;; Commentary:
;;;
;;; This module implements configuration of rottlog by writing
;;; /etc/rottlog/{rc,hourly|daily|weekly}. Example usage
;;;
;;; (mcron-service)
;;; (service rottlog-service-type)
;;;
;;; Code:
(define-record-type* <log-rotation> log-rotation make-log-rotation
log-rotation?
(files log-rotation-files) ;list of strings
(frequency log-rotation-frequency ;symbol
(default 'weekly))
(post-rotate log-rotation-post-rotate ;#f | gexp
(default #f))
(options log-rotation-options ;list of strings
(default '())))
(define %rotated-files
;; Syslog files subject to rotation.
'("/var/log/messages" "/var/log/secure" "/var/log/debug"
"/var/log/maillog"))
(define %default-rotations
(list (log-rotation ;syslog files
(files %rotated-files)
(options '(;; Run post-rotate once per rotation
"sharedscripts"
;; Append .gz to rotated files
"storefile @FILENAME.@COMP_EXT"))
;; Restart syslogd after rotation.
(post-rotate #~(let ((pid (call-with-input-file "/var/run/syslog.pid"
read)))
(kill pid SIGHUP))))
(log-rotation
(files '("/var/log/guix-daemon.log")))))
(define (log-rotation->config rotation)
"Return a string-valued gexp representing the rottlog configuration snippet
for ROTATION."
(define post-rotate
(let ((post (log-rotation-post-rotate rotation)))
(and post
(program-file "rottlog-post-rotate.scm" post))))
#~(let ((post #$post-rotate))
(string-append (string-join '#$(log-rotation-files rotation) ",")
" {"
#$(string-join (log-rotation-options rotation)
"\n " 'prefix)
(if post
(string-append "\n postrotate\n " post
"\n endscript\n")
"")
"\n}\n")))
(define (log-rotations->/etc-entries rotations)
"Return the list of /etc entries for ROTATIONS, a list of <log-rotation>."
(define (frequency-file frequency rotations)
(computed-file (string-append "rottlog." (symbol->string frequency))
#~(call-with-output-file #$output
(lambda (port)
(for-each (lambda (str)
(display str port))
(list #$@(map log-rotation->config
rotations)))))))
(let* ((frequencies (delete-duplicates
(map log-rotation-frequency rotations)))
(table (fold (lambda (rotation table)
(vhash-consq (log-rotation-frequency rotation)
rotation table))
vlist-null
rotations)))
(map (lambda (frequency)
`(,(symbol->string frequency)
,(frequency-file frequency
(vhash-foldq* cons '() frequency table))))
frequencies)))
(define (default-jobs rottlog)
(list #~(job '(next-hour '(0)) ;midnight
#$(file-append rottlog "/sbin/rottlog"))
#~(job '(next-hour '(12)) ;noon
#$(file-append rottlog "/sbin/rottlog"))))
(define-record-type* <rottlog-configuration>
rottlog-configuration make-rottlog-configuration
rottlog-configuration?
(rottlog rottlog-rottlog ;package
(default rottlog))
(rc-file rottlog-rc-file ;file-like
(default (file-append rottlog "/etc/rc")))
(rotations rottlog-rotations ;list of <log-rotation>
(default %default-rotations))
(jobs rottlog-jobs ;list of <mcron-job>
(default #f)))
(define (rottlog-etc config)
`(("rottlog"
,(file-union "rottlog"
(cons `("rc" ,(rottlog-rc-file config))
(log-rotations->/etc-entries
(rottlog-rotations config)))))))
(define (rottlog-jobs-or-default config)
(or (rottlog-jobs config)
(default-jobs (rottlog-rottlog config))))
(define rottlog-service-type
(service-type
(name 'rottlog)
(description
"Periodically rotate log files using GNU@tie{}Rottlog and GNU@tie{}mcron.
Old log files are removed or compressed according to the configuration.")
(extensions (list (service-extension etc-service-type rottlog-etc)
(service-extension mcron-service-type
rottlog-jobs-or-default)
;; Add Rottlog to the global profile so users can access
;; the documentation.
(service-extension profile-service-type
(compose list rottlog-rottlog))))
(compose concatenate)
(extend (lambda (config rotations)
(rottlog-configuration
(inherit config)
(rotations (append (rottlog-rotations config)
rotations)))))
(default-value (rottlog-configuration))))
;;; admin.scm ends here
|
