src/mysql.c

   1 /**
   2  * collectd - src/mysql.c
   3  * Copyright (C) 2006-2010  Florian octo Forster
   4  * Copyright (C) 2008       Mirko Buffoni
   5  * Copyright (C) 2009       Doug MacEachern
   6  * Copyright (C) 2009       Sebastian tokkee Harl
   7  * Copyright (C) 2009       Rodolphe Quiédeville
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; only version 2 of the License is applicable.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  *
  22  * Authors:
  23  *   Florian octo Forster <octo at collectd.org>
  24  *   Mirko Buffoni <briareos at eswat.org>
  25  *   Doug MacEachern <dougm at hyperic.com>
  26  *   Sebastian tokkee Harl <sh at tokkee.org>
  27  *   Rodolphe Quiédeville <rquiedeville at bearstech.com>
  28  **/
  29
  30 #include "collectd.h"
  31
  32 #include "common.h"
  33 #include "plugin.h"
  34 #include "configfile.h"
  35
  36 #ifdef HAVE_MYSQL_H
  37 #include <mysql.h>
  38 #elif defined(HAVE_MYSQL_MYSQL_H)
  39 #include <mysql/mysql.h>
  40 #endif
  41
  42 struct mysql_database_s /* {{{ */
  43 {
  44         char *instance;
  45         char *alias;
  46         char *host;
  47         char *user;
  48         char *pass;
  49         char *database;
  50         char *socket;
  51         int   port;
  52         int   timeout;
  53
  54         _Bool master_stats;
  55         _Bool slave_stats;
  56         _Bool innodb_stats;
  57
  58         _Bool slave_notif;
  59         _Bool slave_io_running;
  60         _Bool slave_sql_running;
  61
  62         MYSQL *con;
  63         _Bool  is_connected;
  64 };
  65 typedef struct mysql_database_s mysql_database_t; /* }}} */
  66
  67 static int mysql_read (user_data_t *ud);
  68
  69 static void mysql_database_free (void *arg) /* {{{ */
  70 {
  71         mysql_database_t *db;
  72
  73         DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
  74
  75         db = arg;
  76
  77         if (db == NULL)
  78                 return;
  79
  80         if (db->con != NULL)
  81                 mysql_close (db->con);
  82
  83         sfree (db->alias);
  84         sfree (db->host);
  85         sfree (db->user);
  86         sfree (db->pass);
  87         sfree (db->socket);
  88         sfree (db->instance);
  89         sfree (db->database);
  90         sfree (db);
  91 } /* }}} void mysql_database_free */
  92
  93 /* Configuration handling functions {{{
  94  *
  95  * <Plugin mysql>
  96  *   <Database "plugin_instance1">
  97  *     Host "localhost"
  98  *     Port 22000
  99  *     ...
 100  *   </Database>
 101  * </Plugin>
 102  */
 103 static int mysql_config_database (oconfig_item_t *ci) /* {{{ */
 104 {
 105         mysql_database_t *db;
 106         int status = 0;
 107         int i;
 108
 109         if ((ci->values_num != 1)
 110             || (ci->values[0].type != OCONFIG_TYPE_STRING))
 111         {
 112                 WARNING ("mysql plugin: The `Database' block "
 113                          "needs exactly one string argument.");
 114                 return (-1);
 115         }
 116
 117         db = calloc (1, sizeof (*db));
 118         if (db == NULL)
 119         {
 120                 ERROR ("mysql plugin: calloc failed.");
 121                 return (-1);
 122         }
 123
 124         /* initialize all the pointers */
 125         db->alias    = NULL;
 126         db->host     = NULL;
 127         db->user     = NULL;
 128         db->pass     = NULL;
 129         db->database = NULL;
 130         db->socket   = NULL;
 131         db->con      = NULL;
 132         db->timeout  = 0;
 133
 134         /* trigger a notification, if it's not running */
 135         db->slave_io_running  = 1;
 136         db->slave_sql_running = 1;
 137
 138         status = cf_util_get_string (ci, &db->instance);
 139         if (status != 0)
 140         {
 141                 sfree (db);
 142                 return (status);
 143         }
 144         assert (db->instance != NULL);
 145
 146         /* Fill the `mysql_database_t' structure.. */
 147         for (i = 0; i < ci->children_num; i++)
 148         {
 149                 oconfig_item_t *child = ci->children + i;
 150
 151                 if (strcasecmp ("Alias", child->key) == 0)
 152                         status = cf_util_get_string (child, &db->alias);
 153                 else if (strcasecmp ("Host", child->key) == 0)
 154                         status = cf_util_get_string (child, &db->host);
 155                 else if (strcasecmp ("User", child->key) == 0)
 156                         status = cf_util_get_string (child, &db->user);
 157                 else if (strcasecmp ("Password", child->key) == 0)
 158                         status = cf_util_get_string (child, &db->pass);
 159                 else if (strcasecmp ("Port", child->key) == 0)
 160                 {
 161                         status = cf_util_get_port_number (child);
 162                         if (status > 0)
 163                         {
 164                                 db->port = status;
 165                                 status = 0;
 166                         }
 167                 }
 168                 else if (strcasecmp ("Socket", child->key) == 0)
 169                         status = cf_util_get_string (child, &db->socket);
 170                 else if (strcasecmp ("Database", child->key) == 0)
 171                         status = cf_util_get_string (child, &db->database);
 172                 else if (strcasecmp ("ConnectTimeout", child->key) == 0)
 173                         status = cf_util_get_int (child, &db->timeout);
 174                 else if (strcasecmp ("MasterStats", child->key) == 0)
 175                         status = cf_util_get_boolean (child, &db->master_stats);
 176                 else if (strcasecmp ("SlaveStats", child->key) == 0)
 177                         status = cf_util_get_boolean (child, &db->slave_stats);
 178                 else if (strcasecmp ("SlaveNotifications", child->key) == 0)
 179                         status = cf_util_get_boolean (child, &db->slave_notif);
 180                 else if (strcasecmp ("InnodbStats", child->key) == 0)
 181                         status = cf_util_get_boolean (child, &db->innodb_stats);
 182                 else
 183                 {
 184                         WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
 185                         status = -1;
 186                 }
 187
 188                 if (status != 0)
 189                         break;
 190         }
 191
 192         /* If all went well, register this database for reading */
 193         if (status == 0)
 194         {
 195                 user_data_t ud = { 0 };
 196                 char cb_name[DATA_MAX_NAME_LEN];
 197
 198                 DEBUG ("mysql plugin: Registering new read callback: %s",
 199                                 (db->database != NULL) ? db->database : "<default>");
 200
 201                 ud.data = (void *) db;
 202                 ud.free_func = mysql_database_free;
 203
 204                 if (db->instance != NULL)
 205                         ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
 206                                         db->instance);
 207                 else
 208                         sstrncpy (cb_name, "mysql", sizeof (cb_name));
 209
 210                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 211                                               mysql_read,
 212                                               /* interval = */ 0, &ud);
 213         }
 214         else
 215         {
 216                 mysql_database_free (db);
 217                 return (-1);
 218         }
 219
 220         return (0);
 221 } /* }}} int mysql_config_database */
 222
 223 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 224 {
 225         int i;
 226
 227         if (ci == NULL)
 228                 return (EINVAL);
 229
 230         /* Fill the `mysql_database_t' structure.. */
 231         for (i = 0; i < ci->children_num; i++)
 232         {
 233                 oconfig_item_t *child = ci->children + i;
 234
 235                 if (strcasecmp ("Database", child->key) == 0)
 236                         mysql_config_database (child);
 237                 else
 238                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 239                                         child->key);
 240         }
 241
 242         return (0);
 243 } /* }}} int mysql_config */
 244
 245 /* }}} End of configuration handling functions */
 246
 247 static MYSQL *getconnection (mysql_database_t *db)
 248 {
 249         if (db->is_connected)
 250         {
 251                 int status;
 252
 253                 status = mysql_ping (db->con);
 254                 if (status == 0)
 255                         return (db->con);
 256
 257                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 258                                 db->instance, mysql_error (db->con));
 259         }
 260         db->is_connected = 0;
 261
 262         if (db->con == NULL)
 263         {
 264                 db->con = mysql_init (NULL);
 265                 if (db->con == NULL)
 266                 {
 267                         ERROR ("mysql plugin: mysql_init failed: %s",
 268                                         mysql_error (db->con));
 269                         return (NULL);
 270                 }
 271         }
 272
 273         /* Configure TCP connect timeout (default: 0) */
 274         db->con->options.connect_timeout = db->timeout;
 275
 276         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 277                                 db->database, db->port, db->socket, 0) == NULL)
 278         {
 279                 ERROR ("mysql plugin: Failed to connect to database %s "
 280                                 "at server %s: %s",
 281                                 (db->database != NULL) ? db->database : "<none>",
 282                                 (db->host != NULL) ? db->host : "localhost",
 283                                 mysql_error (db->con));
 284                 return (NULL);
 285         }
 286
 287         INFO ("mysql plugin: Successfully connected to database %s "
 288                         "at server %s (server version: %s, protocol version: %d)",
 289                         (db->database != NULL) ? db->database : "<none>",
 290                         mysql_get_host_info (db->con),
 291                         mysql_get_server_info (db->con),
 292                         mysql_get_proto_info (db->con));
 293
 294         db->is_connected = 1;
 295         return (db->con);
 296 } /* static MYSQL *getconnection (mysql_database_t *db) */
 297
 298 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 299 {
 300         if (db->alias)
 301                 sstrncpy (buf, db->alias, buflen);
 302         else if ((db->host == NULL)
 303                         || (strcmp ("", db->host) == 0)
 304                         || (strcmp ("127.0.0.1", db->host) == 0)
 305                         || (strcmp ("localhost", db->host) == 0))
 306                 sstrncpy (buf, hostname_g, buflen);
 307         else
 308                 sstrncpy (buf, db->host, buflen);
 309 } /* void set_host */
 310
 311 static void submit (const char *type, const char *type_instance,
 312                 value_t *values, size_t values_len, mysql_database_t *db)
 313 {
 314         value_list_t vl = VALUE_LIST_INIT;
 315
 316         vl.values     = values;
 317         vl.values_len = values_len;
 318
 319         set_host (db, vl.host, sizeof (vl.host));
 320
 321         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 322
 323         /* Assured by "mysql_config_database" */
 324         assert (db->instance != NULL);
 325         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 326
 327         sstrncpy (vl.type, type, sizeof (vl.type));
 328         if (type_instance != NULL)
 329                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 330
 331         plugin_dispatch_values (&vl);
 332 } /* submit */
 333
 334 static void counter_submit (const char *type, const char *type_instance,
 335                 derive_t value, mysql_database_t *db)
 336 {
 337         value_t values[1];
 338
 339         values[0].derive = value;
 340         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 341 } /* void counter_submit */
 342
 343 static void gauge_submit (const char *type, const char *type_instance,
 344                 gauge_t value, mysql_database_t *db)
 345 {
 346         value_t values[1];
 347
 348         values[0].gauge = value;
 349         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 350 } /* void gauge_submit */
 351
 352 static void derive_submit (const char *type, const char *type_instance,
 353                 derive_t value, mysql_database_t *db)
 354 {
 355         value_t values[1];
 356
 357         values[0].derive = value;
 358         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 359 } /* void derive_submit */
 360
 361 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 362 {
 363         value_t values[2];
 364
 365         values[0].derive = rx;
 366         values[1].derive = tx;
 367
 368         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 369 } /* void traffic_submit */
 370
 371 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 372 {
 373         MYSQL_RES *res;
 374
 375         int query_len = strlen (query);
 376
 377         if (mysql_real_query (con, query, query_len))
 378         {
 379                 ERROR ("mysql plugin: Failed to execute query: %s",
 380                                 mysql_error (con));
 381                 INFO ("mysql plugin: SQL query was: %s", query);
 382                 return (NULL);
 383         }
 384
 385         res = mysql_store_result (con);
 386         if (res == NULL)
 387         {
 388                 ERROR ("mysql plugin: Failed to store query result: %s",
 389                                 mysql_error (con));
 390                 INFO ("mysql plugin: SQL query was: %s", query);
 391                 return (NULL);
 392         }
 393
 394         return (res);
 395 } /* exec_query */
 396
 397 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 398 {
 399         MYSQL_RES *res;
 400         MYSQL_ROW  row;
 401
 402         const char *query;
 403         int         field_num;
 404         unsigned long long position;
 405
 406         query = "SHOW MASTER STATUS";
 407
 408         res = exec_query (con, query);
 409         if (res == NULL)
 410                 return (-1);
 411
 412         row = mysql_fetch_row (res);
 413         if (row == NULL)
 414         {
 415                 ERROR ("mysql plugin: Failed to get master statistics: "
 416                                 "`%s' did not return any rows.", query);
 417                 mysql_free_result (res);
 418                 return (-1);
 419         }
 420
 421         field_num = mysql_num_fields (res);
 422         if (field_num < 2)
 423         {
 424                 ERROR ("mysql plugin: Failed to get master statistics: "
 425                                 "`%s' returned less than two columns.", query);
 426                 mysql_free_result (res);
 427                 return (-1);
 428         }
 429
 430         position = atoll (row[1]);
 431         counter_submit ("mysql_log_position", "master-bin", position, db);
 432
 433         row = mysql_fetch_row (res);
 434         if (row != NULL)
 435                 WARNING ("mysql plugin: `%s' returned more than one row - "
 436                                 "ignoring further results.", query);
 437
 438         mysql_free_result (res);
 439
 440         return (0);
 441 } /* mysql_read_master_stats */
 442
 443 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 444 {
 445         MYSQL_RES *res;
 446         MYSQL_ROW  row;
 447
 448         const char *query;
 449         int         field_num;
 450
 451         /* WTF? libmysqlclient does not seem to provide any means to
 452          * translate a column name to a column index ... :-/ */
 453         const int READ_MASTER_LOG_POS_IDX   = 6;
 454         const int SLAVE_IO_RUNNING_IDX      = 10;
 455         const int SLAVE_SQL_RUNNING_IDX     = 11;
 456         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 457         const int SECONDS_BEHIND_MASTER_IDX = 32;
 458
 459         query = "SHOW SLAVE STATUS";
 460
 461         res = exec_query (con, query);
 462         if (res == NULL)
 463                 return (-1);
 464
 465         row = mysql_fetch_row (res);
 466         if (row == NULL)
 467         {
 468                 ERROR ("mysql plugin: Failed to get slave statistics: "
 469                                 "`%s' did not return any rows.", query);
 470                 mysql_free_result (res);
 471                 return (-1);
 472         }
 473
 474         field_num = mysql_num_fields (res);
 475         if (field_num < 33)
 476         {
 477                 ERROR ("mysql plugin: Failed to get slave statistics: "
 478                                 "`%s' returned less than 33 columns.", query);
 479                 mysql_free_result (res);
 480                 return (-1);
 481         }
 482
 483         if (db->slave_stats)
 484         {
 485                 unsigned long long counter;
 486                 double gauge;
 487
 488                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 489                 counter_submit ("mysql_log_position", "slave-read", counter, db);
 490
 491                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 492                 counter_submit ("mysql_log_position", "slave-exec", counter, db);
 493
 494                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 495                 {
 496                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 497                         gauge_submit ("time_offset", NULL, gauge, db);
 498                 }
 499         }
 500
 501         if (db->slave_notif)
 502         {
 503                 notification_t n = { 0, cdtime (), "", "",
 504                         "mysql", "", "time_offset", "", NULL };
 505
 506                 char *io, *sql;
 507
 508                 io  = row[SLAVE_IO_RUNNING_IDX];
 509                 sql = row[SLAVE_SQL_RUNNING_IDX];
 510
 511                 set_host (db, n.host, sizeof (n.host));
 512
 513                 /* Assured by "mysql_config_database" */
 514                 assert (db->instance != NULL);
 515                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 516
 517                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 518                                 && (db->slave_io_running))
 519                 {
 520                         n.severity = NOTIF_WARNING;
 521                         ssnprintf (n.message, sizeof (n.message),
 522                                         "slave I/O thread not started or not connected to master");
 523                         plugin_dispatch_notification (&n);
 524                         db->slave_io_running = 0;
 525                 }
 526                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 527                                 && (! db->slave_io_running))
 528                 {
 529                         n.severity = NOTIF_OKAY;
 530                         ssnprintf (n.message, sizeof (n.message),
 531                                         "slave I/O thread started and connected to master");
 532                         plugin_dispatch_notification (&n);
 533                         db->slave_io_running = 1;
 534                 }
 535
 536                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 537                                 && (db->slave_sql_running))
 538                 {
 539                         n.severity = NOTIF_WARNING;
 540                         ssnprintf (n.message, sizeof (n.message),
 541                                         "slave SQL thread not started");
 542                         plugin_dispatch_notification (&n);
 543                         db->slave_sql_running = 0;
 544                 }
 545                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 546                                 && (! db->slave_sql_running))
 547                 {
 548                         n.severity = NOTIF_OKAY;
 549                         ssnprintf (n.message, sizeof (n.message),
 550                                         "slave SQL thread started");
 551                         plugin_dispatch_notification (&n);
 552                         db->slave_sql_running = 1;
 553                 }
 554         }
 555
 556         row = mysql_fetch_row (res);
 557         if (row != NULL)
 558                 WARNING ("mysql plugin: `%s' returned more than one row - "
 559                                 "ignoring further results.", query);
 560
 561         mysql_free_result (res);
 562
 563         return (0);
 564 } /* mysql_read_slave_stats */
 565
 566 static int mysql_read_innodb_stats (mysql_database_t *db, MYSQL *con)
 567 {
 568         MYSQL_RES *res;
 569         MYSQL_ROW  row;
 570
 571         const char *query;
 572         struct {
 573                 const char *key;
 574                 const char *type;
 575                 int ds_type;
 576         } metrics[] = {
 577                 { "metadata_mem_pool_size",          "bytes",        DS_TYPE_GAUGE },
 578                 { "lock_deadlocks",                  "mysql_locks",  DS_TYPE_DERIVE },
 579                 { "lock_timeouts",                   "mysql_locks",  DS_TYPE_DERIVE },
 580                 { "lock_row_lock_current_waits",     "mysql_locks",  DS_TYPE_DERIVE },
 581                 { "buffer_pool_size",                "bytes",        DS_TYPE_GAUGE },
 582
 583                 { "buffer_pool_reads",               "operations",   DS_TYPE_DERIVE },
 584                 { "buffer_pool_read_requests",       "operations",   DS_TYPE_DERIVE },
 585                 { "buffer_pool_write_requests",      "operations",   DS_TYPE_DERIVE },
 586                 { "buffer_pool_wait_free",           "operations",   DS_TYPE_DERIVE },
 587                 { "buffer_pool_read_ahead",          "operations",   DS_TYPE_DERIVE },
 588                 { "buffer_pool_read_ahead_evicted",  "operations",   DS_TYPE_DERIVE },
 589
 590                 { "buffer_pool_pages_total",         "gauge",        DS_TYPE_GAUGE },
 591                 { "buffer_pool_pages_misc",          "gauge",        DS_TYPE_GAUGE },
 592                 { "buffer_pool_pages_data",          "gauge",        DS_TYPE_GAUGE },
 593                 { "buffer_pool_bytes_data",          "gauge",        DS_TYPE_GAUGE },
 594                 { "buffer_pool_pages_dirty",         "gauge",        DS_TYPE_GAUGE },
 595                 { "buffer_pool_bytes_dirty",         "gauge",        DS_TYPE_GAUGE },
 596                 { "buffer_pool_pages_free",          "gauge",        DS_TYPE_GAUGE },
 597
 598                 { "buffer_pages_created",            "operations",   DS_TYPE_DERIVE },
 599                 { "buffer_pages_written",            "operations",   DS_TYPE_DERIVE },
 600                 { "buffer_pages_read",               "operations",   DS_TYPE_DERIVE },
 601                 { "buffer_data_reads",               "operations",   DS_TYPE_DERIVE },
 602                 { "buffer_data_written",             "operations",   DS_TYPE_DERIVE },
 603
 604                 { "os_data_reads",                   "operations",   DS_TYPE_DERIVE },
 605                 { "os_data_writes",                  "operations",   DS_TYPE_DERIVE },
 606                 { "os_data_fsyncs",                  "operations",   DS_TYPE_DERIVE },
 607                 { "os_log_bytes_written",            "operations",   DS_TYPE_DERIVE },
 608                 { "os_log_fsyncs",                   "operations",   DS_TYPE_DERIVE },
 609                 { "os_log_pending_fsyncs",           "operations",   DS_TYPE_DERIVE },
 610                 { "os_log_pending_writes",           "operations",   DS_TYPE_DERIVE },
 611
 612                 { "trx_rseg_history_len",            "gauge",        DS_TYPE_GAUGE },
 613
 614                 { "log_waits",                       "operations",   DS_TYPE_DERIVE },
 615                 { "log_write_requests",              "operations",   DS_TYPE_DERIVE },
 616                 { "log_writes",                      "operations",   DS_TYPE_DERIVE },
 617                 { "adaptive_hash_searches",          "operations",   DS_TYPE_DERIVE },
 618
 619                 { "file_num_open_files",             "gauge",        DS_TYPE_GAUGE },
 620
 621                 { "ibuf_merges_insert",              "operations",   DS_TYPE_DERIVE },
 622                 { "ibuf_merges_delete_mark",         "operations",   DS_TYPE_DERIVE },
 623                 { "ibuf_merges_delete",              "operations",   DS_TYPE_DERIVE },
 624                 { "ibuf_merges_discard_insert",      "operations",   DS_TYPE_DERIVE },
 625                 { "ibuf_merges_discard_delete_mark", "operations",   DS_TYPE_DERIVE },
 626                 { "ibuf_merges_discard_delete",      "operations",   DS_TYPE_DERIVE },
 627                 { "ibuf_merges_discard_merges",      "operations",   DS_TYPE_DERIVE },
 628                 { "ibuf_size",                       "bytes",        DS_TYPE_GAUGE },
 629
 630                 { "innodb_activity_count",           "gauge",        DS_TYPE_GAUGE },
 631                 { "innodb_dblwr_writes",             "operations",   DS_TYPE_DERIVE },
 632                 { "innodb_dblwr_pages_written",      "operations",   DS_TYPE_DERIVE },
 633                 { "innodb_dblwr_page_size",          "gauge",        DS_TYPE_GAUGE },
 634
 635                 { "innodb_rwlock_s_spin_waits",      "operations",   DS_TYPE_DERIVE },
 636                 { "innodb_rwlock_x_spin_waits",      "operations",   DS_TYPE_DERIVE },
 637                 { "innodb_rwlock_s_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 638                 { "innodb_rwlock_x_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 639                 { "innodb_rwlock_s_os_waits",        "operations",   DS_TYPE_DERIVE },
 640                 { "innodb_rwlock_x_os_waits",        "operations",   DS_TYPE_DERIVE },
 641
 642                 { "dml_reads",                       "operations",   DS_TYPE_DERIVE },
 643                 { "dml_inserts",                     "operations",   DS_TYPE_DERIVE },
 644                 { "dml_deletes",                     "operations",   DS_TYPE_DERIVE },
 645                 { "dml_updates",                     "operations",   DS_TYPE_DERIVE },
 646
 647                 { NULL,                              NULL,           0}
 648         };
 649
 650         query = "SELECT name, count, type FROM information_schema.innodb_metrics WHERE status = 'enabled'";
 651
 652         res = exec_query (con, query);
 653         if (res == NULL)
 654                 return (-1);
 655
 656         while ((row = mysql_fetch_row (res)))
 657         {
 658                 int i;
 659                 char *key;
 660                 unsigned long long val;
 661
 662                 key = row[0];
 663                 val = atoll (row[1]);
 664
 665                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 666                         ;
 667
 668                 if (metrics[i].key == NULL)
 669                         continue;
 670
 671                 switch (metrics[i].ds_type) {
 672                         case DS_TYPE_COUNTER:
 673                                 counter_submit(metrics[i].type, key, (counter_t)val, db);
 674                                 break;
 675                         case DS_TYPE_GAUGE:
 676                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 677                                 break;
 678                         case DS_TYPE_DERIVE:
 679                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 680                                 break;
 681                 }
 682         }
 683
 684         mysql_free_result(res);
 685         return (0);
 686 }
 687
 688 static int mysql_read (user_data_t *ud)
 689 {
 690         mysql_database_t *db;
 691         MYSQL      *con;
 692         MYSQL_RES  *res;
 693         MYSQL_ROW   row;
 694         const char *query;
 695
 696         derive_t qcache_hits          = 0;
 697         derive_t qcache_inserts       = 0;
 698         derive_t qcache_not_cached    = 0;
 699         derive_t qcache_lowmem_prunes = 0;
 700         gauge_t qcache_queries_in_cache = NAN;
 701
 702         gauge_t threads_running   = NAN;
 703         gauge_t threads_connected = NAN;
 704         gauge_t threads_cached    = NAN;
 705         derive_t threads_created = 0;
 706
 707         unsigned long long traffic_incoming = 0ULL;
 708         unsigned long long traffic_outgoing = 0ULL;
 709         unsigned long mysql_version = 0ULL;
 710
 711         if ((ud == NULL) || (ud->data == NULL))
 712         {
 713                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 714                 return (-1);
 715         }
 716
 717         db = (mysql_database_t *) ud->data;
 718
 719         /* An error message will have been printed in this case */
 720         if ((con = getconnection (db)) == NULL)
 721                 return (-1);
 722
 723         mysql_version = mysql_get_server_version(con);
 724
 725         query = "SHOW STATUS";
 726         if (mysql_version >= 50002)
 727                 query = "SHOW GLOBAL STATUS";
 728
 729         res = exec_query (con, query);
 730         if (res == NULL)
 731                 return (-1);
 732
 733         while ((row = mysql_fetch_row (res)))
 734         {
 735                 char *key;
 736                 unsigned long long val;
 737
 738                 key = row[0];
 739                 val = atoll (row[1]);
 740
 741                 if (strncmp (key, "Com_",
 742                                   strlen ("Com_")) == 0)
 743                 {
 744                         if (val == 0ULL)
 745                                 continue;
 746
 747                         /* Ignore `prepared statements' */
 748                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 749                                 counter_submit ("mysql_commands",
 750                                                 key + strlen ("Com_"),
 751                                                 val, db);
 752                 }
 753                 else if (strncmp (key, "Handler_",
 754                                         strlen ("Handler_")) == 0)
 755                 {
 756                         if (val == 0ULL)
 757                                 continue;
 758
 759                         counter_submit ("mysql_handler",
 760                                         key + strlen ("Handler_"),
 761                                         val, db);
 762                 }
 763                 else if (strncmp (key, "Qcache_",
 764                                         strlen ("Qcache_")) == 0)
 765                 {
 766                         if (strcmp (key, "Qcache_hits") == 0)
 767                                 qcache_hits = (derive_t) val;
 768                         else if (strcmp (key, "Qcache_inserts") == 0)
 769                                 qcache_inserts = (derive_t) val;
 770                         else if (strcmp (key, "Qcache_not_cached") == 0)
 771                                 qcache_not_cached = (derive_t) val;
 772                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 773                                 qcache_lowmem_prunes = (derive_t) val;
 774                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 775                                 qcache_queries_in_cache = (gauge_t) val;
 776                 }
 777                 else if (strncmp (key, "Bytes_",
 778                                         strlen ("Bytes_")) == 0)
 779                 {
 780                         if (strcmp (key, "Bytes_received") == 0)
 781                                 traffic_incoming += val;
 782                         else if (strcmp (key, "Bytes_sent") == 0)
 783                                 traffic_outgoing += val;
 784                 }
 785                 else if (strncmp (key, "Threads_",
 786                                         strlen ("Threads_")) == 0)
 787                 {
 788                         if (strcmp (key, "Threads_running") == 0)
 789                                 threads_running = (gauge_t) val;
 790                         else if (strcmp (key, "Threads_connected") == 0)
 791                                 threads_connected = (gauge_t) val;
 792                         else if (strcmp (key, "Threads_cached") == 0)
 793                                 threads_cached = (gauge_t) val;
 794                         else if (strcmp (key, "Threads_created") == 0)
 795                                 threads_created = (derive_t) val;
 796                 }
 797                 else if (strncmp (key, "Table_locks_",
 798                                         strlen ("Table_locks_")) == 0)
 799                 {
 800                         counter_submit ("mysql_locks",
 801                                         key + strlen ("Table_locks_"),
 802                                         val, db);
 803                 }
 804                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 805                 {
 806                         /* buffer pool */
 807                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 808                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 809                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 810                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 811                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 812                                 counter_submit ("mysql_bpool_counters", "pages_flushed", val, db);
 813                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 814                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 815                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 816                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 817                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 818                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 819                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 820                                 counter_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 821                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 822                                 counter_submit ("mysql_bpool_counters", "read_ahead", val, db);
 823                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 824                                 counter_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 825                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 826                                 counter_submit ("mysql_bpool_counters", "read_requests", val, db);
 827                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 828                                 counter_submit ("mysql_bpool_counters", "reads", val, db);
 829                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 830                                 counter_submit ("mysql_bpool_counters", "write_requests", val, db);
 831                         else if (strcmp (key, "Innodb_buffer_pool_bytes_data") == 0)
 832                                 gauge_submit ("mysql_bpool_bytes", "data", val, db);
 833                         else if (strcmp (key, "Innodb_buffer_pool_bytes_dirty") == 0)
 834                                 gauge_submit ("mysql_bpool_bytes", "dirty", val, db);
 835
 836                         /* data */
 837                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 838                                 counter_submit ("mysql_innodb_data", "fsyncs", val, db);
 839                         else if (strcmp (key, "Innodb_data_read") == 0)
 840                                 counter_submit ("mysql_innodb_data", "read", val, db);
 841                         else if (strcmp (key, "Innodb_data_reads") == 0)
 842                                 counter_submit ("mysql_innodb_data", "reads", val, db);
 843                         else if (strcmp (key, "Innodb_data_writes") == 0)
 844                                 counter_submit ("mysql_innodb_data", "writes", val, db);
 845                         else if (strcmp (key, "Innodb_data_written") == 0)
 846                                 counter_submit ("mysql_innodb_data", "written", val, db);
 847
 848                         /* double write */
 849                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 850                                 counter_submit ("mysql_innodb_dblwr", "writes", val, db);
 851                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 852                                 counter_submit ("mysql_innodb_dblwr", "written", val, db);
 853
 854                         /* log */
 855                         else if (strcmp (key, "Innodb_log_waits") == 0)
 856                                 counter_submit ("mysql_innodb_log", "waits", val, db);
 857                         else if (strcmp (key, "Innodb_log_write_requests") == 0)
 858                                 counter_submit ("mysql_innodb_log", "write_requests", val, db);
 859                         else if (strcmp (key, "Innodb_log_writes") == 0)
 860                                 counter_submit ("mysql_innodb_log", "writes", val, db);
 861                         else if (strcmp (key, "Innodb_os_log_fsyncs") == 0)
 862                                 counter_submit ("mysql_innodb_log", "fsyncs", val, db);
 863                         else if (strcmp (key, "Innodb_os_log_written") == 0)
 864                                 counter_submit ("mysql_innodb_log", "written", val, db);
 865
 866                         /* pages */
 867                         else if (strcmp (key, "Innodb_pages_created") == 0)
 868                                 counter_submit ("mysql_innodb_pages", "created", val, db);
 869                         else if (strcmp (key, "Innodb_pages_read") == 0)
 870                                 counter_submit ("mysql_innodb_pages", "read", val, db);
 871                         else if (strcmp (key, "Innodb_pages_written") == 0)
 872                                 counter_submit ("mysql_innodb_pages", "written", val, db);
 873
 874                         /* row lock */
 875                         else if (strcmp (key, "Innodb_row_lock_time") == 0)
 876                                 counter_submit ("mysql_innodb_row_lock", "time", val, db);
 877                         else if (strcmp (key, "Innodb_row_lock_waits") == 0)
 878                                 counter_submit ("mysql_innodb_row_lock", "waits", val, db);
 879
 880                         /* rows */
 881                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 882                                 counter_submit ("mysql_innodb_rows", "deleted", val, db);
 883                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 884                                 counter_submit ("mysql_innodb_rows", "inserted", val, db);
 885                         else if (strcmp (key, "Innodb_rows_read") == 0)
 886                                 counter_submit ("mysql_innodb_rows", "read", val, db);
 887                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 888                                 counter_submit ("mysql_innodb_rows", "updated", val, db);
 889                 }
 890                 else if (strncmp (key, "Select_", strlen ("Select_")) == 0)
 891                 {
 892                         counter_submit ("mysql_select", key + strlen ("Select_"),
 893                                         val, db);
 894                 }
 895                 else if (strncmp (key, "Sort_", strlen ("Sort_")) == 0)
 896                 {
 897                         if (strcmp (key, "Sort_merge_passes") == 0)
 898                                 counter_submit ("mysql_sort_merge_passes", NULL, val, db);
 899                         else if (strcmp (key, "Sort_rows") == 0)
 900                                 counter_submit ("mysql_sort_rows", NULL, val, db);
 901                         else if (strcmp (key, "Sort_range") == 0)
 902                                 counter_submit ("mysql_sort", "range", val, db);
 903                         else if (strcmp (key, "Sort_scan") == 0)
 904                                 counter_submit ("mysql_sort", "scan", val, db);
 905
 906                 }
 907                 else if (strncmp (key, "Slow_queries", strlen ("Slow_queries")) == 0)
 908                 {
 909                         counter_submit ("mysql_slow_queries", NULL , val, db);
 910                 }
 911         }
 912         mysql_free_result (res); res = NULL;
 913
 914         if ((qcache_hits != 0)
 915                         || (qcache_inserts != 0)
 916                         || (qcache_not_cached != 0)
 917                         || (qcache_lowmem_prunes != 0))
 918         {
 919                 derive_submit ("cache_result", "qcache-hits",
 920                                 qcache_hits, db);
 921                 derive_submit ("cache_result", "qcache-inserts",
 922                                 qcache_inserts, db);
 923                 derive_submit ("cache_result", "qcache-not_cached",
 924                                 qcache_not_cached, db);
 925                 derive_submit ("cache_result", "qcache-prunes",
 926                                 qcache_lowmem_prunes, db);
 927
 928                 gauge_submit ("cache_size", "qcache",
 929                                 qcache_queries_in_cache, db);
 930         }
 931
 932         if (threads_created != 0)
 933         {
 934                 gauge_submit ("threads", "running",
 935                                 threads_running, db);
 936                 gauge_submit ("threads", "connected",
 937                                 threads_connected, db);
 938                 gauge_submit ("threads", "cached",
 939                                 threads_cached, db);
 940
 941                 derive_submit ("total_threads", "created",
 942                                 threads_created, db);
 943         }
 944
 945         traffic_submit  (traffic_incoming, traffic_outgoing, db);
 946
 947         if (mysql_version >= 50600 && db->innodb_stats)
 948                 mysql_read_innodb_stats (db, con);
 949
 950         if (db->master_stats)
 951                 mysql_read_master_stats (db, con);
 952
 953         if ((db->slave_stats) || (db->slave_notif))
 954                 mysql_read_slave_stats (db, con);
 955
 956         return (0);
 957 } /* int mysql_read */
 958
 959 void module_register (void)
 960 {
 961         plugin_register_complex_config ("mysql", mysql_config);
 962 } /* void module_register */