src/backend/mk-livestatus.c

   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  */
  27
  28 #include "sysdb.h"
  29 #include "core/plugin.h"
  30 #include "core/store.h"
  31 #include "utils/error.h"
  32 #include "utils/unixsock.h"
  33
  34 #include "liboconfig/utils.h"
  35
  36 #include <assert.h>
  37
  38 #include <errno.h>
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43
  44 SDB_PLUGIN_MAGIC;
  45
  46 /*
  47  * private helper functions
  48  */
  49
  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;
  57
  58         int status;
  59
  60         assert(n == 2);
  61         assert((data[0].type == SDB_TYPE_STRING)
  62                         && (data[1].type == SDB_TYPE_DATETIME));
  63
  64         hostname  = data[0].data.string;
  65         timestamp = data[1].data.datetime;
  66
  67         status = sdb_store_host(hostname, timestamp);
  68
  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;
  76
  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 */
  82
  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;
  91
  92         int status;
  93
  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));
  98
  99         hostname  = data[0].data.string;
 100         svcname   = data[1].data.string;
 101         timestamp = data[2].data.datetime;
 102
 103         status = sdb_store_service(hostname, svcname, timestamp);
 104
 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;
 112
 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 */
 118
 119 /*
 120  * plugin API
 121  */
 122
 123 static int
 124 sdb_livestatus_init(sdb_object_t *user_data)
 125 {
 126         sdb_unixsock_client_t *client;
 127
 128         if (! user_data)
 129                 return -1;
 130
 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         }
 138
 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 */
 144
 145 static int
 146 sdb_livestatus_collect(sdb_object_t *user_data)
 147 {
 148         sdb_unixsock_client_t *client;
 149
 150         int status;
 151
 152         if (! user_data)
 153                 return -1;
 154
 155         client = SDB_OBJ_WRAPPER(user_data)->data;
 156
 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         }
 165
 166         sdb_unixsock_client_shutdown(client, SHUT_WR);
 167
 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         }
 176
 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         }
 186
 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         }
 195
 196         sdb_unixsock_client_shutdown(client, SHUT_WR);
 197
 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         }
 207
 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 */
 219
 220 static int
 221 sdb_livestatus_config_instance(oconfig_item_t *ci)
 222 {
 223         char *name = NULL;
 224         char *socket_path = NULL;
 225
 226         char cb_name[1024];
 227
 228         sdb_object_t *user_data;
 229         sdb_unixsock_client_t *client;
 230
 231         int i;
 232
 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         }
 238
 239         for (i = 0; i < ci->children_num; ++i) {
 240                 oconfig_item_t *child = ci->children + i;
 241
 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         }
 249
 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         }
 255
 256         snprintf(cb_name, sizeof(cb_name), "mk-livestatus::%s", name);
 257         cb_name[sizeof(cb_name) - 1] = '\0';
 258
 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         }
 267
 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         }
 276
 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);
 280
 281         /* pass control to the list */
 282         sdb_object_deref(user_data);
 283         return 0;
 284 } /* sdb_livestatus_config_instance */
 285
 286 static int
 287 sdb_livestatus_config(oconfig_item_t *ci)
 288 {
 289         int i;
 290
 291         for (i = 0; i < ci->children_num; ++i) {
 292                 oconfig_item_t *child = ci->children + i;
 293
 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 */
 302
 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);
 314
 315         sdb_plugin_register_config("mk-livestatus", sdb_livestatus_config);
 316         return 0;
 317 } /* sdb_version_extra */
 318
 319 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 320