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_get_data(sc_unixsock_client_t __attribute__((unused)) *client,
52 size_t n, sc_data_t *data, sc_object_t __attribute__((unused)) *user_data)
53 {
54 char *hostname = NULL;
55 sc_time_t timestamp = 0;
57 sc_host_t host = SC_HOST_INIT;
59 int status;
61 assert(n == 2);
62 assert((data[0].type == SC_TYPE_STRING)
63 && (data[1].type == SC_TYPE_DATETIME));
65 hostname = strdup(data[0].data.string);
66 timestamp = data[1].data.datetime;
68 host.host_name = hostname;
69 host.host_last_update = timestamp;
71 status = sc_store_host(&host);
73 if (status < 0) {
74 fprintf(stderr, "MK Livestatus backend: Failed to store/update "
75 "host '%s'.\n", hostname);
76 free(hostname);
77 return -1;
78 }
79 else if (status > 0) /* value too old */
80 return 0;
82 fprintf(stderr, "MK Livestatus backend: Added/updated host '%s' "
83 "(last update timestamp = %"PRIscTIME").\n",
84 hostname, timestamp);
85 free(hostname);
86 return 0;
87 } /* sc_livestatus_get_data */
89 /*
90 * plugin API
91 */
93 static int
94 sc_livestatus_init(sc_object_t *user_data)
95 {
96 sc_unixsock_client_t *client;
98 if (! user_data)
99 return -1;
101 client = SC_OBJ_WRAPPER(user_data)->data;
102 if (sc_unixsock_client_connect(client)) {
103 fprintf(stderr, "MK Livestatus backend: "
104 "Failed to connect to livestatus @ %s.\n",
105 sc_unixsock_client_path(client));
106 return -1;
107 }
109 fprintf(stderr, "MK Livestatus backend: Successfully "
110 "connected to livestatus @ %s.\n",
111 sc_unixsock_client_path(client));
112 return 0;
113 } /* sc_livestatus_init */
115 static int
116 sc_livestatus_collect(sc_object_t *user_data)
117 {
118 sc_unixsock_client_t *client;
120 int status;
122 if (! user_data)
123 return -1;
125 client = SC_OBJ_WRAPPER(user_data)->data;
127 status = sc_unixsock_client_send(client, "GET hosts\r\n"
128 "Columns: name last_check");
129 if (status <= 0) {
130 fprintf(stderr, "MK Livestatus backend: Failed to send "
131 "'GET hosts' command to livestatus @ %s.\n",
132 sc_unixsock_client_path(client));
133 return -1;
134 }
136 sc_unixsock_client_shutdown(client, SHUT_WR);
138 if (sc_unixsock_client_process_lines(client, sc_livestatus_get_data,
139 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
140 /* column count */ 2, SC_TYPE_STRING, SC_TYPE_DATETIME)) {
141 fprintf(stderr, "MK Livestatus backend: Failed to read response "
142 "from livestatus @ %s.\n", sc_unixsock_client_path(client));
143 return -1;
144 }
146 if ((! sc_unixsock_client_eof(client))
147 || sc_unixsock_client_error(client)) {
148 char errbuf[1024];
149 fprintf(stderr, "MK Livestatus backend: Failed to read host "
150 "from livestatus @ %s: %s\n",
151 sc_unixsock_client_path(client),
152 sc_strerror(errno, errbuf, sizeof(errbuf)));
153 return -1;
154 }
155 return 0;
156 } /* sc_livestatus_collect */
158 static int
159 sc_livestatus_config_instance(oconfig_item_t *ci)
160 {
161 char *name = NULL;
162 char *socket = NULL;
164 char cb_name[1024];
166 sc_object_t *user_data;
167 sc_unixsock_client_t *client;
169 int i;
171 if (oconfig_get_string(ci, &name)) {
172 fprintf(stderr, "MK Livestatus backend: Instance requires a single "
173 "string argument\n\tUsage: <Instance NAME>\n");
174 return -1;
175 }
177 for (i = 0; i < ci->children_num; ++i) {
178 oconfig_item_t *child = ci->children + i;
180 if (! strcasecmp(child->key, "Socket"))
181 oconfig_get_string(child, &socket);
182 else
183 fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
184 "option '%s' inside <Instance %s>.\n",
185 child->key, name);
186 }
188 if (! socket) {
189 fprintf(stderr, "MK Livestatus backend: Instance '%s' missing "
190 "the 'Socket' option.\n", name);
191 return -1;
192 }
194 snprintf(cb_name, sizeof(cb_name), "mk-livestatus-%s", name);
195 cb_name[sizeof(cb_name) - 1] = '\0';
197 client = sc_unixsock_client_create(socket);
198 if (! client) {
199 char errbuf[1024];
200 fprintf(stderr, "MK Livestatus backend: Failed to create unixsock "
201 "client: %s\n", sc_strerror(errno, errbuf, sizeof(errbuf)));
202 return -1;
203 }
205 user_data = sc_object_create_wrapper(client,
206 (void (*)(void *))sc_unixsock_client_destroy);
207 if (! user_data) {
208 sc_unixsock_client_destroy(client);
209 fprintf(stderr, "MK Livestatus backend: Failed to "
210 "allocate sc_object_t\n");
211 return -1;
212 }
214 sc_plugin_register_init(cb_name, sc_livestatus_init, user_data);
215 sc_plugin_register_collector(cb_name, sc_livestatus_collect,
216 /* interval */ NULL, user_data);
218 /* pass control to the list */
219 sc_object_deref(user_data);
220 return 0;
221 } /* sc_livestatus_config_instance */
223 static int
224 sc_livestatus_config(oconfig_item_t *ci)
225 {
226 int i;
228 for (i = 0; i < ci->children_num; ++i) {
229 oconfig_item_t *child = ci->children + i;
231 if (! strcasecmp(child->key, "Instance"))
232 sc_livestatus_config_instance(child);
233 else
234 fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
235 "option '%s'.\n", child->key);
236 }
237 return 0;
238 } /* sc_livestatus_config */
240 int
241 sc_module_init(sc_plugin_info_t *info)
242 {
243 sc_plugin_set_info(info, SC_PLUGIN_INFO_NAME, "MK-Livestatus");
244 sc_plugin_set_info(info, SC_PLUGIN_INFO_DESC,
245 "backend accessing Nagios/Icinga/Shinken using MK Livestatus");
246 sc_plugin_set_info(info, SC_PLUGIN_INFO_COPYRIGHT,
247 "Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>");
248 sc_plugin_set_info(info, SC_PLUGIN_INFO_LICENSE, "BSD");
249 sc_plugin_set_info(info, SC_PLUGIN_INFO_VERSION, SC_VERSION);
250 sc_plugin_set_info(info, SC_PLUGIN_INFO_PLUGIN_VERSION, SC_VERSION);
252 sc_plugin_register_config("mk-livestatus", sc_livestatus_config);
253 return 0;
254 } /* sc_version_extra */
256 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */