1 /*
2 * syscollector - src/backend/mk-livestatus.c
3 * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #include "syscollector.h"
29 #include "core/plugin.h"
30 #include "core/store.h"
31 #include "utils/string.h"
32 #include "utils/unixsock.h"
34 #include "liboconfig/utils.h"
36 #include <assert.h>
38 #include <errno.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
44 SC_PLUGIN_MAGIC;
46 /*
47 * private helper functions
48 */
50 static int
51 sc_livestatus_parse_line(char *line,
52 char **host, sc_time_t *timestamp)
53 {
54 char *timestamp_str;
55 double timestamp_dbl;
57 char *hostname;
59 char *endptr = NULL;
61 hostname = line;
62 timestamp_str = strchr(hostname, ';');
64 if (! timestamp_str) {
65 fprintf(stderr, "MK Livestatus backend: Failed to find timestamp "
66 "in 'GET hosts' output, line: %s\n", line);
67 return -1;
68 }
70 *timestamp_str = '\0';
71 ++timestamp_str;
73 errno = 0;
74 timestamp_dbl = strtod(timestamp_str, &endptr);
75 if (errno || (timestamp_str == endptr)) {
76 char errbuf[1024];
77 fprintf(stderr, "MK Livestatus backend: Failed to "
78 "parse timestamp (%s): %s\n", timestamp_str,
79 sc_strerror(errno, errbuf, sizeof(errbuf)));
80 return -1;
81 }
82 if (endptr && (*endptr != '\0'))
83 fprintf(stderr, "MK Livestatus backend: Ignoring garbage "
84 "after number when parsing timestamp: %s.\n",
85 endptr);
87 *timestamp = DOUBLE_TO_SC_TIME(timestamp_dbl);
88 *host = hostname;
89 return 0;
90 } /* sc_livestatus_parse_line */
92 /*
93 * plugin API
94 */
96 static int
97 sc_livestatus_init(sc_object_t *user_data)
98 {
99 sc_unixsock_client_t *client;
101 if (! user_data)
102 return -1;
104 client = SC_OBJ_WRAPPER(user_data)->data;
105 if (sc_unixsock_client_connect(client)) {
106 fprintf(stderr, "MK Livestatus backend: "
107 "Failed to connect to livestatus @ %s.\n",
108 sc_unixsock_client_path(client));
109 return -1;
110 }
112 fprintf(stderr, "MK Livestatus backend: Successfully "
113 "connected to livestatus @ %s.\n",
114 sc_unixsock_client_path(client));
115 return 0;
116 } /* sc_livestatus_init */
118 static int
119 sc_livestatus_collect(sc_object_t *user_data)
120 {
121 sc_unixsock_client_t *client;
123 int status;
125 if (! user_data)
126 return -1;
128 client = SC_OBJ_WRAPPER(user_data)->data;
130 status = sc_unixsock_client_send(client, "GET hosts\r\n"
131 "Columns: name last_check");
132 if (status <= 0) {
133 fprintf(stderr, "MK Livestatus backend: Failed to send "
134 "'GET hosts' command to livestatus @ %s.\n",
135 sc_unixsock_client_path(client));
136 return -1;
137 }
139 sc_unixsock_client_shutdown(client, SHUT_WR);
141 while (42) {
142 char buffer[1024];
143 char *line;
145 char *hostname = NULL;
146 sc_time_t timestamp = 0;
148 sc_host_t host = SC_HOST_INIT;
150 sc_unixsock_client_clearerr(client);
151 line = sc_unixsock_client_recv(client, buffer, sizeof(buffer));
153 if (! line)
154 break;
156 if (sc_livestatus_parse_line(line, &hostname, ×tamp)) {
157 fprintf(stderr, "MK Livestatus backend: Failed to parse "
158 "hosts line: %s\n", line);
159 continue;
160 }
162 host.host_name = hostname;
163 host.host_last_update = timestamp;
165 status = sc_store_host(&host);
167 if (status < 0) {
168 fprintf(stderr, "MK Livestatus backend: Failed to store/update "
169 "host '%s'.\n", hostname);
170 continue;
171 }
172 else if (status > 0) /* value too old */
173 continue;
175 fprintf(stderr, "MK Livestatus backend: Added/updated host '%s' "
176 "(last update timestamp = %"PRIscTIME").\n",
177 hostname, timestamp);
178 }
180 if ((! sc_unixsock_client_eof(client))
181 || sc_unixsock_client_error(client)) {
182 char errbuf[1024];
183 fprintf(stderr, "MK Livestatus backend: Failed to read host "
184 "from livestatus @ %s: %s\n",
185 sc_unixsock_client_path(client),
186 sc_strerror(errno, errbuf, sizeof(errbuf)));
187 return -1;
188 }
189 return 0;
190 } /* sc_livestatus_collect */
192 static int
193 sc_livestatus_config_instance(oconfig_item_t *ci)
194 {
195 char *name = NULL;
196 char *socket = NULL;
198 char cb_name[1024];
200 sc_object_t *user_data;
201 sc_unixsock_client_t *client;
203 int i;
205 if (oconfig_get_string(ci, &name)) {
206 fprintf(stderr, "MK Livestatus backend: Instance requires a single "
207 "string argument\n\tUsage: <Instance NAME>\n");
208 return -1;
209 }
211 for (i = 0; i < ci->children_num; ++i) {
212 oconfig_item_t *child = ci->children + i;
214 if (! strcasecmp(child->key, "Socket"))
215 oconfig_get_string(child, &socket);
216 else
217 fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
218 "option '%s' inside <Instance %s>.\n",
219 child->key, name);
220 }
222 if (! socket) {
223 fprintf(stderr, "MK Livestatus backend: Instance '%s' missing "
224 "the 'Socket' option.\n", name);
225 return -1;
226 }
228 snprintf(cb_name, sizeof(cb_name), "mk-livestatus-%s", name);
229 cb_name[sizeof(cb_name) - 1] = '\0';
231 client = sc_unixsock_client_create(socket);
232 if (! client) {
233 char errbuf[1024];
234 fprintf(stderr, "MK Livestatus backend: Failed to create unixsock "
235 "client: %s\n", sc_strerror(errno, errbuf, sizeof(errbuf)));
236 return -1;
237 }
239 user_data = sc_object_create_wrapper(client,
240 (void (*)(void *))sc_unixsock_client_destroy);
241 if (! user_data) {
242 sc_unixsock_client_destroy(client);
243 fprintf(stderr, "MK Livestatus backend: Failed to "
244 "allocate sc_object_t\n");
245 return -1;
246 }
248 sc_plugin_register_init(cb_name, sc_livestatus_init, user_data);
249 sc_plugin_register_collector(cb_name, sc_livestatus_collect,
250 /* interval */ NULL, user_data);
252 /* pass control to the list */
253 sc_object_deref(user_data);
254 return 0;
255 } /* sc_livestatus_config_instance */
257 static int
258 sc_livestatus_config(oconfig_item_t *ci)
259 {
260 int i;
262 for (i = 0; i < ci->children_num; ++i) {
263 oconfig_item_t *child = ci->children + i;
265 if (! strcasecmp(child->key, "Instance"))
266 sc_livestatus_config_instance(child);
267 else
268 fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
269 "option '%s'.\n", child->key);
270 }
271 return 0;
272 } /* sc_livestatus_config */
274 int
275 sc_module_init(sc_plugin_info_t *info)
276 {
277 sc_plugin_set_info(info, SC_PLUGIN_INFO_NAME, "MK-Livestatus");
278 sc_plugin_set_info(info, SC_PLUGIN_INFO_DESC,
279 "backend accessing Nagios/Icinga/Shinken using MK Livestatus");
280 sc_plugin_set_info(info, SC_PLUGIN_INFO_COPYRIGHT,
281 "Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>");
282 sc_plugin_set_info(info, SC_PLUGIN_INFO_LICENSE, "BSD");
283 sc_plugin_set_info(info, SC_PLUGIN_INFO_VERSION, SC_VERSION);
284 sc_plugin_set_info(info, SC_PLUGIN_INFO_PLUGIN_VERSION, SC_VERSION);
286 sc_plugin_register_config("mk-livestatus", sc_livestatus_config);
287 return 0;
288 } /* sc_version_extra */
290 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */