1 /*
2 * SysDB - 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 "sysdb.h"
29 #include "core/plugin.h"
30 #include "core/store.h"
31 #include "core/error.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 SDB_PLUGIN_MAGIC;
46 /*
47 * private helper functions
48 */
50 static int
51 sdb_livestatus_get_host(sdb_unixsock_client_t __attribute__((unused)) *client,
52 size_t n, sdb_data_t *data,
53 sdb_object_t __attribute__((unused)) *user_data)
54 {
55 const char *hostname;
56 sdb_time_t timestamp;
58 int status;
60 assert(n == 2);
61 assert((data[0].type == SDB_TYPE_STRING)
62 && (data[1].type == SDB_TYPE_DATETIME));
64 hostname = data[0].data.string;
65 timestamp = data[1].data.datetime;
67 status = sdb_store_host(hostname, timestamp);
69 if (status < 0) {
70 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
71 "store/update host '%s'.", hostname);
72 return -1;
73 }
74 else if (status > 0) /* value too old */
75 return 0;
77 sdb_log(SDB_LOG_DEBUG, "MK Livestatus backend: Added/updated "
78 "host '%s' (last update timestamp = %"PRIscTIME").",
79 hostname, timestamp);
80 return 0;
81 } /* sdb_livestatus_get_host */
83 static int
84 sdb_livestatus_get_svc(sdb_unixsock_client_t __attribute__((unused)) *client,
85 size_t n, sdb_data_t *data,
86 sdb_object_t __attribute__((unused)) *user_data)
87 {
88 const char *hostname = NULL;
89 const char *svcname = NULL;
90 sdb_time_t timestamp = 0;
92 int status;
94 assert(n == 3);
95 assert((data[0].type == SDB_TYPE_STRING)
96 && (data[1].type == SDB_TYPE_STRING)
97 && (data[2].type == SDB_TYPE_DATETIME));
99 hostname = data[0].data.string;
100 svcname = data[1].data.string;
101 timestamp = data[2].data.datetime;
103 status = sdb_store_service(hostname, svcname, timestamp);
105 if (status < 0) {
106 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
107 "store/update service '%s / %s'.", hostname, svcname);
108 return -1;
109 }
110 else if (status > 0) /* value too old */
111 return 0;
113 sdb_log(SDB_LOG_DEBUG, "MK Livestatus backend: Added/updated "
114 "service '%s / %s' (last update timestamp = %"PRIscTIME").",
115 hostname, svcname, timestamp);
116 return 0;
117 } /* sdb_livestatus_get_svc */
119 /*
120 * plugin API
121 */
123 static int
124 sdb_livestatus_init(sdb_object_t *user_data)
125 {
126 sdb_unixsock_client_t *client;
128 if (! user_data)
129 return -1;
131 client = SDB_OBJ_WRAPPER(user_data)->data;
132 if (sdb_unixsock_client_connect(client)) {
133 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: "
134 "Failed to connect to livestatus @ %s.",
135 sdb_unixsock_client_path(client));
136 return -1;
137 }
139 sdb_log(SDB_LOG_INFO, "MK Livestatus backend: Successfully "
140 "connected to livestatus @ %s.",
141 sdb_unixsock_client_path(client));
142 return 0;
143 } /* sdb_livestatus_init */
145 static int
146 sdb_livestatus_collect(sdb_object_t *user_data)
147 {
148 sdb_unixsock_client_t *client;
150 int status;
152 if (! user_data)
153 return -1;
155 client = SDB_OBJ_WRAPPER(user_data)->data;
157 status = sdb_unixsock_client_send(client, "GET hosts\r\n"
158 "Columns: name last_check");
159 if (status <= 0) {
160 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to send "
161 "'GET hosts' command to livestatus @ %s.",
162 sdb_unixsock_client_path(client));
163 return -1;
164 }
166 sdb_unixsock_client_shutdown(client, SHUT_WR);
168 if (sdb_unixsock_client_process_lines(client, sdb_livestatus_get_host,
169 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
170 /* column count */ 2, SDB_TYPE_STRING, SDB_TYPE_DATETIME)) {
171 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
172 "response from livestatus @ %s while reading hosts.",
173 sdb_unixsock_client_path(client));
174 return -1;
175 }
177 if ((! sdb_unixsock_client_eof(client))
178 || sdb_unixsock_client_error(client)) {
179 char errbuf[1024];
180 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
181 "host from livestatus @ %s: %s",
182 sdb_unixsock_client_path(client),
183 sdb_strerror(errno, errbuf, sizeof(errbuf)));
184 return -1;
185 }
187 status = sdb_unixsock_client_send(client, "GET services\r\n"
188 "Columns: host_name description last_check");
189 if (status <= 0) {
190 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to send "
191 "'GET services' command to livestatus @ %s.",
192 sdb_unixsock_client_path(client));
193 return -1;
194 }
196 sdb_unixsock_client_shutdown(client, SHUT_WR);
198 if (sdb_unixsock_client_process_lines(client, sdb_livestatus_get_svc,
199 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
200 /* column count */ 3, SDB_TYPE_STRING, SDB_TYPE_STRING,
201 SDB_TYPE_DATETIME)) {
202 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
203 "response from livestatus @ %s while reading services.",
204 sdb_unixsock_client_path(client));
205 return -1;
206 }
208 if ((! sdb_unixsock_client_eof(client))
209 || sdb_unixsock_client_error(client)) {
210 char errbuf[1024];
211 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
212 "services from livestatus @ %s: %s",
213 sdb_unixsock_client_path(client),
214 sdb_strerror(errno, errbuf, sizeof(errbuf)));
215 return -1;
216 }
217 return 0;
218 } /* sdb_livestatus_collect */
220 static int
221 sdb_livestatus_config_instance(oconfig_item_t *ci)
222 {
223 char *name = NULL;
224 char *socket_path = NULL;
226 char cb_name[1024];
228 sdb_object_t *user_data;
229 sdb_unixsock_client_t *client;
231 int i;
233 if (oconfig_get_string(ci, &name)) {
234 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Instance requires "
235 "a single string argument\n\tUsage: <Instance NAME>");
236 return -1;
237 }
239 for (i = 0; i < ci->children_num; ++i) {
240 oconfig_item_t *child = ci->children + i;
242 if (! strcasecmp(child->key, "Socket"))
243 oconfig_get_string(child, &socket_path);
244 else
245 sdb_log(SDB_LOG_WARNING, "MK Livestatus backend: Ignoring "
246 "unknown config option '%s' inside <Instance %s>.",
247 child->key, name);
248 }
250 if (! socket_path) {
251 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Instance '%s' "
252 "missing the 'Socket' option.", name);
253 return -1;
254 }
256 snprintf(cb_name, sizeof(cb_name), "mk-livestatus::%s", name);
257 cb_name[sizeof(cb_name) - 1] = '\0';
259 client = sdb_unixsock_client_create(socket_path);
260 if (! client) {
261 char errbuf[1024];
262 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to create "
263 "unixsock client: %s",
264 sdb_strerror(errno, errbuf, sizeof(errbuf)));
265 return -1;
266 }
268 user_data = sdb_object_create_wrapper("unixsock-client", client,
269 (void (*)(void *))sdb_unixsock_client_destroy);
270 if (! user_data) {
271 sdb_unixsock_client_destroy(client);
272 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
273 "allocate sdb_object_t");
274 return -1;
275 }
277 sdb_plugin_register_init(cb_name, sdb_livestatus_init, user_data);
278 sdb_plugin_register_collector(cb_name, sdb_livestatus_collect,
279 /* interval */ NULL, user_data);
281 /* pass control to the list */
282 sdb_object_deref(user_data);
283 return 0;
284 } /* sdb_livestatus_config_instance */
286 static int
287 sdb_livestatus_config(oconfig_item_t *ci)
288 {
289 int i;
291 for (i = 0; i < ci->children_num; ++i) {
292 oconfig_item_t *child = ci->children + i;
294 if (! strcasecmp(child->key, "Instance"))
295 sdb_livestatus_config_instance(child);
296 else
297 sdb_log(SDB_LOG_WARNING, "MK Livestatus backend: Ignoring "
298 "unknown config option '%s'.", child->key);
299 }
300 return 0;
301 } /* sdb_livestatus_config */
303 int
304 sdb_module_init(sdb_plugin_info_t *info)
305 {
306 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_NAME, "MK-Livestatus");
307 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_DESC,
308 "backend accessing Nagios/Icinga/Shinken using MK Livestatus");
309 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_COPYRIGHT,
310 "Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>");
311 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_LICENSE, "BSD");
312 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_VERSION, SDB_VERSION);
313 sdb_plugin_set_info(info, SDB_PLUGIN_INFO_PLUGIN_VERSION, SDB_VERSION);
315 sdb_plugin_register_config("mk-livestatus", sdb_livestatus_config);
316 return 0;
317 } /* sdb_version_extra */
319 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */