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