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         char *hostname = NULL;
  56         sdb_time_t timestamp = 0;
  57
  58         sdb_host_t host = SDB_HOST_INIT;
  59
  60         int status;
  61
  62         assert(n == 2);
  63         assert((data[0].type == SDB_TYPE_STRING)
  64                         && (data[1].type == SDB_TYPE_DATETIME));
  65
  66         hostname  = strdup(data[0].data.string);
  67         timestamp = data[1].data.datetime;
  68
  69         host._name = hostname;
  70         host._last_update = timestamp;
  71
  72         status = sdb_store_host(&host);
  73
  74         if (status < 0) {
  75                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
  76                                 "store/update host '%s'.", hostname);
  77                 free(hostname);
  78                 return -1;
  79         }
  80         else if (status > 0) /* value too old */
  81                 return 0;
  82
  83         sdb_log(SDB_LOG_DEBUG, "MK Livestatus backend: Added/updated "
  84                         "host '%s' (last update timestamp = %"PRIscTIME").",
  85                         hostname, timestamp);
  86         free(hostname);
  87         return 0;
  88 } /* sdb_livestatus_get_host */
  89
  90 static int
  91 sdb_livestatus_get_svc(sdb_unixsock_client_t __attribute__((unused)) *client,
  92                 size_t n, sdb_data_t *data,
  93                 sdb_object_t __attribute__((unused)) *user_data)
  94 {
  95         char *hostname = NULL;
  96         char *svcname = NULL;
  97         sdb_time_t timestamp = 0;
  98
  99         sdb_service_t svc = SDB_SVC_INIT;
 100
 101         int status;
 102
 103         assert(n == 3);
 104         assert((data[0].type == SDB_TYPE_STRING)
 105                         && (data[1].type == SDB_TYPE_STRING)
 106                         && (data[2].type == SDB_TYPE_DATETIME));
 107
 108         hostname  = strdup(data[0].data.string);
 109         svcname   = strdup(data[1].data.string);
 110         timestamp = data[2].data.datetime;
 111
 112         svc.hostname = hostname;
 113         svc._name = svcname;
 114         svc._last_update = timestamp;
 115
 116         status = sdb_store_service(&svc);
 117
 118         if (status < 0) {
 119                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
 120                                 "store/update service '%s / %s'.", hostname, svcname);
 121                 free(hostname);
 122                 free(svcname);
 123                 return -1;
 124         }
 125         else if (status > 0) /* value too old */
 126                 return 0;
 127
 128         sdb_log(SDB_LOG_DEBUG, "MK Livestatus backend: Added/updated "
 129                         "service '%s / %s' (last update timestamp = %"PRIscTIME").",
 130                         hostname, svcname, timestamp);
 131         free(hostname);
 132         free(svcname);
 133         return 0;
 134 } /* sdb_livestatus_get_svc */
 135
 136 /*
 137  * plugin API
 138  */
 139
 140 static int
 141 sdb_livestatus_init(sdb_object_t *user_data)
 142 {
 143         sdb_unixsock_client_t *client;
 144
 145         if (! user_data)
 146                 return -1;
 147
 148         client = SDB_OBJ_WRAPPER(user_data)->data;
 149         if (sdb_unixsock_client_connect(client)) {
 150                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: "
 151                                 "Failed to connect to livestatus @ %s.",
 152                                 sdb_unixsock_client_path(client));
 153                 return -1;
 154         }
 155
 156         sdb_log(SDB_LOG_INFO, "MK Livestatus backend: Successfully "
 157                         "connected to livestatus @ %s.",
 158                         sdb_unixsock_client_path(client));
 159         return 0;
 160 } /* sdb_livestatus_init */
 161
 162 static int
 163 sdb_livestatus_collect(sdb_object_t *user_data)
 164 {
 165         sdb_unixsock_client_t *client;
 166
 167         int status;
 168
 169         if (! user_data)
 170                 return -1;
 171
 172         client = SDB_OBJ_WRAPPER(user_data)->data;
 173
 174         status = sdb_unixsock_client_send(client, "GET hosts\r\n"
 175                         "Columns: name last_check");
 176         if (status <= 0) {
 177                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to send "
 178                                 "'GET hosts' command to livestatus @ %s.",
 179                                 sdb_unixsock_client_path(client));
 180                 return -1;
 181         }
 182
 183         sdb_unixsock_client_shutdown(client, SHUT_WR);
 184
 185         if (sdb_unixsock_client_process_lines(client, sdb_livestatus_get_host,
 186                                 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
 187                                 /* column count */ 2, SDB_TYPE_STRING, SDB_TYPE_DATETIME)) {
 188                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
 189                                 "response from livestatus @ %s while reading hosts.",
 190                                 sdb_unixsock_client_path(client));
 191                 return -1;
 192         }
 193
 194         if ((! sdb_unixsock_client_eof(client))
 195                         || sdb_unixsock_client_error(client)) {
 196                 char errbuf[1024];
 197                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
 198                                 "host from livestatus @ %s: %s",
 199                                 sdb_unixsock_client_path(client),
 200                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 201                 return -1;
 202         }
 203
 204         status = sdb_unixsock_client_send(client, "GET services\r\n"
 205                         "Columns: host_name description last_check");
 206         if (status <= 0) {
 207                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to send "
 208                                 "'GET services' command to livestatus @ %s.",
 209                                 sdb_unixsock_client_path(client));
 210                 return -1;
 211         }
 212
 213         sdb_unixsock_client_shutdown(client, SHUT_WR);
 214
 215         if (sdb_unixsock_client_process_lines(client, sdb_livestatus_get_svc,
 216                                 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
 217                                 /* column count */ 3, SDB_TYPE_STRING, SDB_TYPE_STRING,
 218                                 SDB_TYPE_DATETIME)) {
 219                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
 220                                 "response from livestatus @ %s while reading services.",
 221                                 sdb_unixsock_client_path(client));
 222                 return -1;
 223         }
 224
 225         if ((! sdb_unixsock_client_eof(client))
 226                         || sdb_unixsock_client_error(client)) {
 227                 char errbuf[1024];
 228                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to read "
 229                                 "services from livestatus @ %s: %s",
 230                                 sdb_unixsock_client_path(client),
 231                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 232                 return -1;
 233         }
 234         return 0;
 235 } /* sdb_livestatus_collect */
 236
 237 static int
 238 sdb_livestatus_config_instance(oconfig_item_t *ci)
 239 {
 240         char *name = NULL;
 241         char *socket_path = NULL;
 242
 243         char cb_name[1024];
 244
 245         sdb_object_t *user_data;
 246         sdb_unixsock_client_t *client;
 247
 248         int i;
 249
 250         if (oconfig_get_string(ci, &name)) {
 251                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Instance requires "
 252                                 "a single string argument\n\tUsage: <Instance NAME>");
 253                 return -1;
 254         }
 255
 256         for (i = 0; i < ci->children_num; ++i) {
 257                 oconfig_item_t *child = ci->children + i;
 258
 259                 if (! strcasecmp(child->key, "Socket"))
 260                         oconfig_get_string(child, &socket_path);
 261                 else
 262                         sdb_log(SDB_LOG_WARNING, "MK Livestatus backend: Ignoring "
 263                                         "unknown config option '%s' inside <Instance %s>.",
 264                                         child->key, name);
 265         }
 266
 267         if (! socket_path) {
 268                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Instance '%s' "
 269                                 "missing the 'Socket' option.", name);
 270                 return -1;
 271         }
 272
 273         snprintf(cb_name, sizeof(cb_name), "mk-livestatus::%s", name);
 274         cb_name[sizeof(cb_name) - 1] = '\0';
 275
 276         client = sdb_unixsock_client_create(socket_path);
 277         if (! client) {
 278                 char errbuf[1024];
 279                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to create "
 280                                 "unixsock client: %s",
 281                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 282                 return -1;
 283         }
 284
 285         user_data = sdb_object_create_wrapper(client,
 286                         (void (*)(void *))sdb_unixsock_client_destroy);
 287         if (! user_data) {
 288                 sdb_unixsock_client_destroy(client);
 289                 sdb_log(SDB_LOG_ERR, "MK Livestatus backend: Failed to "
 290                                 "allocate sdb_object_t");
 291                 return -1;
 292         }
 293
 294         sdb_plugin_register_init(cb_name, sdb_livestatus_init, user_data);
 295         sdb_plugin_register_collector(cb_name, sdb_livestatus_collect,
 296                         /* interval */ NULL, user_data);
 297
 298         /* pass control to the list */
 299         sdb_object_deref(user_data);
 300         return 0;
 301 } /* sdb_livestatus_config_instance */
 302
 303 static int
 304 sdb_livestatus_config(oconfig_item_t *ci)
 305 {
 306         int i;
 307
 308         for (i = 0; i < ci->children_num; ++i) {
 309                 oconfig_item_t *child = ci->children + i;
 310
 311                 if (! strcasecmp(child->key, "Instance"))
 312                         sdb_livestatus_config_instance(child);
 313                 else
 314                         sdb_log(SDB_LOG_WARNING, "MK Livestatus backend: Ignoring "
 315                                         "unknown config option '%s'.", child->key);
 316         }
 317         return 0;
 318 } /* sdb_livestatus_config */
 319
 320 int
 321 sdb_module_init(sdb_plugin_info_t *info)
 322 {
 323         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_NAME, "MK-Livestatus");
 324         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_DESC,
 325                         "backend accessing Nagios/Icinga/Shinken using MK Livestatus");
 326         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_COPYRIGHT,
 327                         "Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>");
 328         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_LICENSE, "BSD");
 329         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_VERSION, SDB_VERSION);
 330         sdb_plugin_set_info(info, SDB_PLUGIN_INFO_PLUGIN_VERSION, SDB_VERSION);
 331
 332         sdb_plugin_register_config("mk-livestatus", sdb_livestatus_config);
 333         return 0;
 334 } /* sdb_version_extra */
 335
 336 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 337