src/backend/mk-livestatus.c

   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  */
  27
  28 #include "syscollector.h"
  29 #include "core/plugin.h"
  30 #include "core/store.h"
  31 #include "utils/string.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 SC_PLUGIN_MAGIC;
  45
  46 /*
  47  * private helper functions
  48  */
  49
  50 static int
  51 sc_livestatus_get_host(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;
  56
  57         sc_host_t host = SC_HOST_INIT;
  58
  59         int status;
  60
  61         assert(n == 2);
  62         assert((data[0].type == SC_TYPE_STRING)
  63                         && (data[1].type == SC_TYPE_DATETIME));
  64
  65         hostname  = strdup(data[0].data.string);
  66         timestamp = data[1].data.datetime;
  67
  68         host.host_name = hostname;
  69         host.host_last_update = timestamp;
  70
  71         status = sc_store_host(&host);
  72
  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;
  81
  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_host */
  88
  89 static int
  90 sc_livestatus_get_svc(sc_unixsock_client_t __attribute__((unused)) *client,
  91                 size_t n, sc_data_t *data, sc_object_t __attribute__((unused)) *user_data)
  92 {
  93         char *hostname = NULL;
  94         char *svcname = NULL;
  95         sc_time_t timestamp = 0;
  96
  97         sc_service_t svc = SC_SVC_INIT;
  98
  99         int status;
 100
 101         assert(n == 3);
 102         assert((data[0].type == SC_TYPE_STRING)
 103                         && (data[1].type == SC_TYPE_STRING)
 104                         && (data[2].type == SC_TYPE_DATETIME));
 105
 106         hostname  = strdup(data[0].data.string);
 107         svcname   = strdup(data[1].data.string);
 108         timestamp = data[2].data.datetime;
 109
 110         svc.hostname = hostname;
 111         svc.svc_name = svcname;
 112         svc.svc_last_update = timestamp;
 113
 114         status = sc_store_service(&svc);
 115
 116         if (status < 0) {
 117                 fprintf(stderr, "MK Livestatus backend: Failed to store/update "
 118                                 "service '%s / %s'.\n", hostname, svcname);
 119                 free(hostname);
 120                 free(svcname);
 121                 return -1;
 122         }
 123         else if (status > 0) /* value too old */
 124                 return 0;
 125
 126         fprintf(stderr, "MK Livestatus backend: Added/updated service '%s / %s' "
 127                         "(last update timestamp = %"PRIscTIME").\n",
 128                         hostname, svcname, timestamp);
 129         free(hostname);
 130         free(svcname);
 131         return 0;
 132 } /* sc_livestatus_get_svc */
 133
 134 /*
 135  * plugin API
 136  */
 137
 138 static int
 139 sc_livestatus_init(sc_object_t *user_data)
 140 {
 141         sc_unixsock_client_t *client;
 142
 143         if (! user_data)
 144                 return -1;
 145
 146         client = SC_OBJ_WRAPPER(user_data)->data;
 147         if (sc_unixsock_client_connect(client)) {
 148                 fprintf(stderr, "MK Livestatus backend: "
 149                                 "Failed to connect to livestatus @ %s.\n",
 150                                 sc_unixsock_client_path(client));
 151                 return -1;
 152         }
 153
 154         fprintf(stderr, "MK Livestatus backend: Successfully "
 155                         "connected to livestatus @ %s.\n",
 156                         sc_unixsock_client_path(client));
 157         return 0;
 158 } /* sc_livestatus_init */
 159
 160 static int
 161 sc_livestatus_collect(sc_object_t *user_data)
 162 {
 163         sc_unixsock_client_t *client;
 164
 165         int status;
 166
 167         if (! user_data)
 168                 return -1;
 169
 170         client = SC_OBJ_WRAPPER(user_data)->data;
 171
 172         status = sc_unixsock_client_send(client, "GET hosts\r\n"
 173                         "Columns: name last_check");
 174         if (status <= 0) {
 175                 fprintf(stderr, "MK Livestatus backend: Failed to send "
 176                                 "'GET hosts' command to livestatus @ %s.\n",
 177                                 sc_unixsock_client_path(client));
 178                 return -1;
 179         }
 180
 181         sc_unixsock_client_shutdown(client, SHUT_WR);
 182
 183         if (sc_unixsock_client_process_lines(client, sc_livestatus_get_host,
 184                                 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
 185                                 /* column count */ 2, SC_TYPE_STRING, SC_TYPE_DATETIME)) {
 186                 fprintf(stderr, "MK Livestatus backend: Failed to read response "
 187                                 "from livestatus @ %s while reading hosts.\n",
 188                                 sc_unixsock_client_path(client));
 189                 return -1;
 190         }
 191
 192         if ((! sc_unixsock_client_eof(client))
 193                         || sc_unixsock_client_error(client)) {
 194                 char errbuf[1024];
 195                 fprintf(stderr, "MK Livestatus backend: Failed to read host "
 196                                 "from livestatus @ %s: %s\n",
 197                                 sc_unixsock_client_path(client),
 198                                 sc_strerror(errno, errbuf, sizeof(errbuf)));
 199                 return -1;
 200         }
 201
 202         status = sc_unixsock_client_send(client, "GET services\r\n"
 203                         "Columns: host_name description last_check");
 204         if (status <= 0) {
 205                 fprintf(stderr, "MK Livestatus backend: Failed to send "
 206                                 "'GET services' command to livestatus @ %s.\n",
 207                                 sc_unixsock_client_path(client));
 208                 return -1;
 209         }
 210
 211         sc_unixsock_client_shutdown(client, SHUT_WR);
 212
 213         if (sc_unixsock_client_process_lines(client, sc_livestatus_get_svc,
 214                                 /* user data */ NULL, /* -> EOF */ -1, /* delim */ ";",
 215                                 /* column count */ 3, SC_TYPE_STRING, SC_TYPE_STRING,
 216                                 SC_TYPE_DATETIME)) {
 217                 fprintf(stderr, "MK Livestatus backend: Failed to read response "
 218                                 "from livestatus @ %s while reading services.\n",
 219                                 sc_unixsock_client_path(client));
 220                 return -1;
 221         }
 222
 223         if ((! sc_unixsock_client_eof(client))
 224                         || sc_unixsock_client_error(client)) {
 225                 char errbuf[1024];
 226                 fprintf(stderr, "MK Livestatus backend: Failed to read services "
 227                                 "from livestatus @ %s: %s\n",
 228                                 sc_unixsock_client_path(client),
 229                                 sc_strerror(errno, errbuf, sizeof(errbuf)));
 230                 return -1;
 231         }
 232         return 0;
 233 } /* sc_livestatus_collect */
 234
 235 static int
 236 sc_livestatus_config_instance(oconfig_item_t *ci)
 237 {
 238         char *name = NULL;
 239         char *socket = NULL;
 240
 241         char cb_name[1024];
 242
 243         sc_object_t *user_data;
 244         sc_unixsock_client_t *client;
 245
 246         int i;
 247
 248         if (oconfig_get_string(ci, &name)) {
 249                 fprintf(stderr, "MK Livestatus backend: Instance requires a single "
 250                                 "string argument\n\tUsage: <Instance NAME>\n");
 251                 return -1;
 252         }
 253
 254         for (i = 0; i < ci->children_num; ++i) {
 255                 oconfig_item_t *child = ci->children + i;
 256
 257                 if (! strcasecmp(child->key, "Socket"))
 258                         oconfig_get_string(child, &socket);
 259                 else
 260                         fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
 261                                         "option '%s' inside <Instance %s>.\n",
 262                                         child->key, name);
 263         }
 264
 265         if (! socket) {
 266                 fprintf(stderr, "MK Livestatus backend: Instance '%s' missing "
 267                                 "the 'Socket' option.\n", name);
 268                 return -1;
 269         }
 270
 271         snprintf(cb_name, sizeof(cb_name), "mk-livestatus-%s", name);
 272         cb_name[sizeof(cb_name) - 1] = '\0';
 273
 274         client = sc_unixsock_client_create(socket);
 275         if (! client) {
 276                 char errbuf[1024];
 277                 fprintf(stderr, "MK Livestatus backend: Failed to create unixsock "
 278                                 "client: %s\n", sc_strerror(errno, errbuf, sizeof(errbuf)));
 279                 return -1;
 280         }
 281
 282         user_data = sc_object_create_wrapper(client,
 283                         (void (*)(void *))sc_unixsock_client_destroy);
 284         if (! user_data) {
 285                 sc_unixsock_client_destroy(client);
 286                 fprintf(stderr, "MK Livestatus backend: Failed to "
 287                                 "allocate sc_object_t\n");
 288                 return -1;
 289         }
 290
 291         sc_plugin_register_init(cb_name, sc_livestatus_init, user_data);
 292         sc_plugin_register_collector(cb_name, sc_livestatus_collect,
 293                         /* interval */ NULL, user_data);
 294
 295         /* pass control to the list */
 296         sc_object_deref(user_data);
 297         return 0;
 298 } /* sc_livestatus_config_instance */
 299
 300 static int
 301 sc_livestatus_config(oconfig_item_t *ci)
 302 {
 303         int i;
 304
 305         for (i = 0; i < ci->children_num; ++i) {
 306                 oconfig_item_t *child = ci->children + i;
 307
 308                 if (! strcasecmp(child->key, "Instance"))
 309                         sc_livestatus_config_instance(child);
 310                 else
 311                         fprintf(stderr, "MK Livestatus backend: Ignoring unknown config "
 312                                         "option '%s'.\n", child->key);
 313         }
 314         return 0;
 315 } /* sc_livestatus_config */
 316
 317 int
 318 sc_module_init(sc_plugin_info_t *info)
 319 {
 320         sc_plugin_set_info(info, SC_PLUGIN_INFO_NAME, "MK-Livestatus");
 321         sc_plugin_set_info(info, SC_PLUGIN_INFO_DESC,
 322                         "backend accessing Nagios/Icinga/Shinken using MK Livestatus");
 323         sc_plugin_set_info(info, SC_PLUGIN_INFO_COPYRIGHT,
 324                         "Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>");
 325         sc_plugin_set_info(info, SC_PLUGIN_INFO_LICENSE, "BSD");
 326         sc_plugin_set_info(info, SC_PLUGIN_INFO_VERSION, SC_VERSION);
 327         sc_plugin_set_info(info, SC_PLUGIN_INFO_PLUGIN_VERSION, SC_VERSION);
 328
 329         sc_plugin_register_config("mk-livestatus", sc_livestatus_config);
 330         return 0;
 331 } /* sc_version_extra */
 332
 333 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 334