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