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1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org> | |
7fe1432a | 3 | ;;; Copyright © 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org> |
92c03a87 JN |
4 | ;;; |
5 | ;;; This file is part of GNU Guix. | |
6 | ;;; | |
7 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
8 | ;;; under the terms of the GNU General Public License as published by | |
9 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
10 | ;;; your option) any later version. | |
11 | ;;; | |
12 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
13 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;;; GNU General Public License for more details. | |
16 | ;;; | |
17 | ;;; You should have received a copy of thye GNU General Public License | |
18 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | (define-module (gnu services admin) | |
21 | #:use-module (gnu packages admin) | |
22 | #:use-module (gnu packages base) | |
23 | #:use-module (gnu services) | |
24 | #:use-module (gnu services mcron) | |
25 | #:use-module (gnu services shepherd) | |
26 | #:use-module (guix gexp) | |
27 | #:use-module (guix packages) | |
28 | #:use-module (guix records) | |
29 | #:use-module (srfi srfi-1) | |
81fa2229 | 30 | #:use-module (ice-9 vlist) |
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31 | #:export (%default-rotations |
32 | %rotated-files | |
81fa2229 LC |
33 | |
34 | log-rotation | |
35 | log-rotation? | |
36 | log-rotation-frequency | |
37 | log-rotation-files | |
38 | log-rotation-options | |
39 | log-rotation-post-rotate | |
40 | ||
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41 | rottlog-configuration |
42 | rottlog-configuration? | |
43 | rottlog-service | |
19de8273 | 44 | rottlog-service-type)) |
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45 | |
46 | ;;; Commentary: | |
47 | ;;; | |
48 | ;;; This module implements configuration of rottlog by writing | |
49 | ;;; /etc/rottlog/{rc,hourly|daily|weekly}. Example usage | |
50 | ;;; | |
51 | ;;; (mcron-service) | |
81fa2229 | 52 | ;;; (service rottlog-service-type) |
92c03a87 JN |
53 | ;;; |
54 | ;;; Code: | |
55 | ||
81fa2229 LC |
56 | (define-record-type* <log-rotation> log-rotation make-log-rotation |
57 | log-rotation? | |
58 | (files log-rotation-files) ;list of strings | |
59 | (frequency log-rotation-frequency ;symbol | |
60 | (default 'weekly)) | |
61 | (post-rotate log-rotation-post-rotate ;#f | gexp | |
62 | (default #f)) | |
63 | (options log-rotation-options ;list of strings | |
64 | (default '()))) | |
65 | ||
92c03a87 | 66 | (define %rotated-files |
4d67ed70 | 67 | ;; Syslog files subject to rotation. |
7fe1432a LC |
68 | '("/var/log/messages" "/var/log/secure" "/var/log/debug" |
69 | "/var/log/maillog")) | |
92c03a87 | 70 | |
92c03a87 | 71 | (define %default-rotations |
81fa2229 LC |
72 | (list (log-rotation ;syslog files |
73 | (files %rotated-files) | |
74 | ||
75 | ;; Restart syslogd after rotation. | |
76 | (options '("sharedscripts")) | |
77 | (post-rotate #~(let ((pid (call-with-input-file "/var/run/syslog.pid" | |
78 | read))) | |
79 | (kill pid SIGHUP)))) | |
80 | (log-rotation | |
ca5b7311 | 81 | (files '("/var/log/guix-daemon.log"))))) |
81fa2229 LC |
82 | |
83 | (define (log-rotation->config rotation) | |
84 | "Return a string-valued gexp representing the rottlog configuration snippet | |
85 | for ROTATION." | |
86 | (define post-rotate | |
87 | (let ((post (log-rotation-post-rotate rotation))) | |
88 | (and post | |
89 | (program-file "rottlog-post-rotate.scm" post)))) | |
90 | ||
91 | #~(let ((post #$post-rotate)) | |
92 | (string-append (string-join '#$(log-rotation-files rotation) ",") | |
93 | " {" | |
94 | #$(string-join (log-rotation-options rotation) | |
95 | "\n " 'prefix) | |
96 | (if post | |
97 | (string-append "\n postrotate\n " post | |
98 | "\n endscript\n") | |
99 | "") | |
100 | "\n}\n"))) | |
101 | ||
102 | (define (log-rotations->/etc-entries rotations) | |
103 | "Return the list of /etc entries for ROTATIONS, a list of <log-rotation>." | |
104 | (define (frequency-file frequency rotations) | |
105 | (computed-file (string-append "rottlog." (symbol->string frequency)) | |
106 | #~(call-with-output-file #$output | |
107 | (lambda (port) | |
108 | (for-each (lambda (str) | |
109 | (display str port)) | |
110 | (list #$@(map log-rotation->config | |
111 | rotations))))))) | |
112 | ||
113 | (let* ((frequencies (delete-duplicates | |
114 | (map log-rotation-frequency rotations))) | |
115 | (table (fold (lambda (rotation table) | |
116 | (vhash-consq (log-rotation-frequency rotation) | |
117 | rotation table)) | |
118 | vlist-null | |
119 | rotations))) | |
120 | (map (lambda (frequency) | |
121 | `(,(symbol->string frequency) | |
122 | ,(frequency-file frequency | |
123 | (vhash-foldq* cons '() frequency table)))) | |
124 | frequencies))) | |
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125 | |
126 | (define (default-jobs rottlog) | |
127 | (list #~(job '(next-hour '(0)) ;midnight | |
89fdd9ee | 128 | #$(file-append rottlog "/sbin/rottlog")) |
92c03a87 | 129 | #~(job '(next-hour '(12)) ;noon |
89fdd9ee | 130 | #$(file-append rottlog "/sbin/rottlog")))) |
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131 | |
132 | (define-record-type* <rottlog-configuration> | |
133 | rottlog-configuration make-rottlog-configuration | |
134 | rottlog-configuration? | |
135 | (rottlog rottlog-rottlog ;package | |
136 | (default rottlog)) | |
137 | (rc-file rottlog-rc-file ;file-like | |
138 | (default (file-append rottlog "/etc/rc"))) | |
81fa2229 | 139 | (rotations rottlog-rotations ;list of <log-rotation> |
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140 | (default %default-rotations)) |
141 | (jobs rottlog-jobs ;list of <mcron-job> | |
142 | (default #f))) | |
143 | ||
144 | (define (rottlog-etc config) | |
81fa2229 LC |
145 | `(("rottlog" |
146 | ,(file-union "rottlog" | |
147 | (cons `("rc" ,(rottlog-rc-file config)) | |
148 | (log-rotations->/etc-entries | |
149 | (rottlog-rotations config))))))) | |
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150 | |
151 | (define (rottlog-jobs-or-default config) | |
152 | (or (rottlog-jobs config) | |
153 | (default-jobs (rottlog-rottlog config)))) | |
154 | ||
155 | (define rottlog-service-type | |
156 | (service-type | |
157 | (name 'rottlog) | |
21b71b01 LC |
158 | (description |
159 | "Periodically rotate log files using GNU@tie{}Rottlog and GNU@tie{}mcron. | |
160 | Old log files are removed or compressed according to the configuration.") | |
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161 | (extensions (list (service-extension etc-service-type rottlog-etc) |
162 | (service-extension mcron-service-type | |
26cfc415 LC |
163 | rottlog-jobs-or-default) |
164 | ||
165 | ;; Add Rottlog to the global profile so users can access | |
166 | ;; the documentation. | |
167 | (service-extension profile-service-type | |
3d3c5650 | 168 | (compose list rottlog-rottlog)))) |
254ea3f9 LC |
169 | (compose concatenate) |
170 | (extend (lambda (config rotations) | |
171 | (rottlog-configuration | |
172 | (inherit config) | |
173 | (rotations (append (rottlog-rotations config) | |
174 | rotations))))) | |
3d3c5650 | 175 | (default-value (rottlog-configuration)))) |
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176 | |
177 | ;;; admin.scm ends here |