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
  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
  50         /* mysql_ssl_set params */
  51         char *key;
  52         char *cert;
  53         char *ca;
  54         char *capath;
  55         char *cipher;
  56
  57         char *socket;
  58         int   port;
  59         int   timeout;
  60
  61         _Bool master_stats;
  62         _Bool slave_stats;
  63         _Bool innodb_stats;
  64         _Bool wsrep_stats;
  65
  66         _Bool slave_notif;
  67         _Bool slave_io_running;
  68         _Bool slave_sql_running;
  69
  70         MYSQL *con;
  71         _Bool  is_connected;
  72 };
  73 typedef struct mysql_database_s mysql_database_t; /* }}} */
  74
  75 static int mysql_read (user_data_t *ud);
  76
  77 static void mysql_database_free (void *arg) /* {{{ */
  78 {
  79         mysql_database_t *db;
  80
  81         DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
  82
  83         db = arg;
  84
  85         if (db == NULL)
  86                 return;
  87
  88         if (db->con != NULL)
  89                 mysql_close (db->con);
  90
  91         sfree (db->alias);
  92         sfree (db->host);
  93         sfree (db->user);
  94         sfree (db->pass);
  95         sfree (db->socket);
  96         sfree (db->instance);
  97         sfree (db->database);
  98         sfree (db->key);
  99         sfree (db->cert);
 100         sfree (db->ca);
 101         sfree (db->capath);
 102         sfree (db->cipher);
 103         sfree (db);
 104 } /* }}} void mysql_database_free */
 105
 106 /* Configuration handling functions {{{
 107  *
 108  * <Plugin mysql>
 109  *   <Database "plugin_instance1">
 110  *     Host "localhost"
 111  *     Port 22000
 112  *     ...
 113  *   </Database>
 114  * </Plugin>
 115  */
 116 static int mysql_config_database (oconfig_item_t *ci) /* {{{ */
 117 {
 118         mysql_database_t *db;
 119         int status = 0;
 120
 121         if ((ci->values_num != 1)
 122             || (ci->values[0].type != OCONFIG_TYPE_STRING))
 123         {
 124                 WARNING ("mysql plugin: The `Database' block "
 125                          "needs exactly one string argument.");
 126                 return (-1);
 127         }
 128
 129         db = calloc (1, sizeof (*db));
 130         if (db == NULL)
 131         {
 132                 ERROR ("mysql plugin: calloc failed.");
 133                 return (-1);
 134         }
 135
 136         /* initialize all the pointers */
 137         db->alias    = NULL;
 138         db->host     = NULL;
 139         db->user     = NULL;
 140         db->pass     = NULL;
 141         db->database = NULL;
 142         db->key      = NULL;
 143         db->cert     = NULL;
 144         db->ca       = NULL;
 145         db->capath   = NULL;
 146         db->cipher   = NULL;
 147
 148         db->socket   = NULL;
 149         db->con      = NULL;
 150         db->timeout  = 0;
 151
 152         /* trigger a notification, if it's not running */
 153         db->slave_io_running  = 1;
 154         db->slave_sql_running = 1;
 155
 156         status = cf_util_get_string (ci, &db->instance);
 157         if (status != 0)
 158         {
 159                 sfree (db);
 160                 return (status);
 161         }
 162         assert (db->instance != NULL);
 163
 164         /* Fill the `mysql_database_t' structure.. */
 165         for (int i = 0; i < ci->children_num; i++)
 166         {
 167                 oconfig_item_t *child = ci->children + i;
 168
 169                 if (strcasecmp ("Alias", child->key) == 0)
 170                         status = cf_util_get_string (child, &db->alias);
 171                 else if (strcasecmp ("Host", child->key) == 0)
 172                         status = cf_util_get_string (child, &db->host);
 173                 else if (strcasecmp ("User", child->key) == 0)
 174                         status = cf_util_get_string (child, &db->user);
 175                 else if (strcasecmp ("Password", child->key) == 0)
 176                         status = cf_util_get_string (child, &db->pass);
 177                 else if (strcasecmp ("Port", child->key) == 0)
 178                 {
 179                         status = cf_util_get_port_number (child);
 180                         if (status > 0)
 181                         {
 182                                 db->port = status;
 183                                 status = 0;
 184                         }
 185                 }
 186                 else if (strcasecmp ("Socket", child->key) == 0)
 187                         status = cf_util_get_string (child, &db->socket);
 188                 else if (strcasecmp ("Database", child->key) == 0)
 189                         status = cf_util_get_string (child, &db->database);
 190                 else if (strcasecmp ("SSLKey", child->key) == 0)
 191                         status = cf_util_get_string (child, &db->key);
 192                 else if (strcasecmp ("SSLCert", child->key) == 0)
 193                         status = cf_util_get_string (child, &db->cert);
 194                 else if (strcasecmp ("SSLCA", child->key) == 0)
 195                         status = cf_util_get_string (child, &db->ca);
 196                 else if (strcasecmp ("SSLCAPath", child->key) == 0)
 197                         status = cf_util_get_string (child, &db->capath);
 198                 else if (strcasecmp ("SSLCipher", child->key) == 0)
 199                         status = cf_util_get_string (child, &db->cipher);
 200                 else if (strcasecmp ("ConnectTimeout", child->key) == 0)
 201                         status = cf_util_get_int (child, &db->timeout);
 202                 else if (strcasecmp ("MasterStats", child->key) == 0)
 203                         status = cf_util_get_boolean (child, &db->master_stats);
 204                 else if (strcasecmp ("SlaveStats", child->key) == 0)
 205                         status = cf_util_get_boolean (child, &db->slave_stats);
 206                 else if (strcasecmp ("SlaveNotifications", child->key) == 0)
 207                         status = cf_util_get_boolean (child, &db->slave_notif);
 208                 else if (strcasecmp ("InnodbStats", child->key) == 0)
 209                         status = cf_util_get_boolean (child, &db->innodb_stats);
 210                 else if (strcasecmp ("WsrepStats", child->key) == 0)
 211                         status = cf_util_get_boolean (child, &db->wsrep_stats);
 212                 else
 213                 {
 214                         WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
 215                         status = -1;
 216                 }
 217
 218                 if (status != 0)
 219                         break;
 220         }
 221
 222         /* If all went well, register this database for reading */
 223         if (status == 0)
 224         {
 225                 user_data_t ud = { 0 };
 226                 char cb_name[DATA_MAX_NAME_LEN];
 227
 228                 DEBUG ("mysql plugin: Registering new read callback: %s",
 229                                 (db->database != NULL) ? db->database : "<default>");
 230
 231                 ud.data = (void *) db;
 232                 ud.free_func = mysql_database_free;
 233
 234                 if (db->instance != NULL)
 235                         ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
 236                                         db->instance);
 237                 else
 238                         sstrncpy (cb_name, "mysql", sizeof (cb_name));
 239
 240                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 241                                               mysql_read,
 242                                               /* interval = */ 0, &ud);
 243         }
 244         else
 245         {
 246                 mysql_database_free (db);
 247                 return (-1);
 248         }
 249
 250         return (0);
 251 } /* }}} int mysql_config_database */
 252
 253 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 254 {
 255         if (ci == NULL)
 256                 return (EINVAL);
 257
 258         /* Fill the `mysql_database_t' structure.. */
 259         for (int i = 0; i < ci->children_num; i++)
 260         {
 261                 oconfig_item_t *child = ci->children + i;
 262
 263                 if (strcasecmp ("Database", child->key) == 0)
 264                         mysql_config_database (child);
 265                 else
 266                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 267                                         child->key);
 268         }
 269
 270         return (0);
 271 } /* }}} int mysql_config */
 272
 273 /* }}} End of configuration handling functions */
 274
 275 static MYSQL *getconnection (mysql_database_t *db)
 276 {
 277         const char *cipher;
 278
 279         if (db->is_connected)
 280         {
 281                 int status;
 282
 283                 status = mysql_ping (db->con);
 284                 if (status == 0)
 285                         return (db->con);
 286
 287                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 288                                 db->instance, mysql_error (db->con));
 289         }
 290         db->is_connected = 0;
 291
 292         if (db->con == NULL)
 293         {
 294                 db->con = mysql_init (NULL);
 295                 if (db->con == NULL)
 296                 {
 297                         ERROR ("mysql plugin: mysql_init failed: %s",
 298                                         mysql_error (db->con));
 299                         return (NULL);
 300                 }
 301         }
 302
 303         /* Configure TCP connect timeout (default: 0) */
 304         db->con->options.connect_timeout = db->timeout;
 305
 306         mysql_ssl_set (db->con, db->key, db->cert, db->ca, db->capath, db->cipher);
 307
 308         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 309                                 db->database, db->port, db->socket, 0) == NULL)
 310         {
 311                 ERROR ("mysql plugin: Failed to connect to database %s "
 312                                 "at server %s: %s",
 313                                 (db->database != NULL) ? db->database : "<none>",
 314                                 (db->host != NULL) ? db->host : "localhost",
 315                                 mysql_error (db->con));
 316                 return (NULL);
 317         }
 318
 319         cipher = mysql_get_ssl_cipher (db->con);
 320
 321         INFO ("mysql plugin: Successfully connected to database %s "
 322                         "at server %s with cipher %s "
 323                         "(server version: %s, protocol version: %d) ",
 324                         (db->database != NULL) ? db->database : "<none>",
 325                         mysql_get_host_info (db->con),
 326                         (cipher != NULL) ?  cipher : "<none>",
 327                         mysql_get_server_info (db->con),
 328                         mysql_get_proto_info (db->con));
 329
 330         db->is_connected = 1;
 331         return (db->con);
 332 } /* static MYSQL *getconnection (mysql_database_t *db) */
 333
 334 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 335 {
 336         if (db->alias)
 337                 sstrncpy (buf, db->alias, buflen);
 338         else if ((db->host == NULL)
 339                         || (strcmp ("", db->host) == 0)
 340                         || (strcmp ("127.0.0.1", db->host) == 0)
 341                         || (strcmp ("localhost", db->host) == 0))
 342                 sstrncpy (buf, hostname_g, buflen);
 343         else
 344                 sstrncpy (buf, db->host, buflen);
 345 } /* void set_host */
 346
 347 static void submit (const char *type, const char *type_instance,
 348                 value_t *values, size_t values_len, mysql_database_t *db)
 349 {
 350         value_list_t vl = VALUE_LIST_INIT;
 351
 352         vl.values     = values;
 353         vl.values_len = values_len;
 354
 355         set_host (db, vl.host, sizeof (vl.host));
 356
 357         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 358
 359         /* Assured by "mysql_config_database" */
 360         assert (db->instance != NULL);
 361         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 362
 363         sstrncpy (vl.type, type, sizeof (vl.type));
 364         if (type_instance != NULL)
 365                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 366
 367         plugin_dispatch_values (&vl);
 368 } /* submit */
 369
 370 static void counter_submit (const char *type, const char *type_instance,
 371                 derive_t value, mysql_database_t *db)
 372 {
 373         value_t values[1];
 374
 375         values[0].derive = value;
 376         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 377 } /* void counter_submit */
 378
 379 static void gauge_submit (const char *type, const char *type_instance,
 380                 gauge_t value, mysql_database_t *db)
 381 {
 382         value_t values[1];
 383
 384         values[0].gauge = value;
 385         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 386 } /* void gauge_submit */
 387
 388 static void derive_submit (const char *type, const char *type_instance,
 389                 derive_t value, mysql_database_t *db)
 390 {
 391         value_t values[1];
 392
 393         values[0].derive = value;
 394         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 395 } /* void derive_submit */
 396
 397 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 398 {
 399         value_t values[2];
 400
 401         values[0].derive = rx;
 402         values[1].derive = tx;
 403
 404         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 405 } /* void traffic_submit */
 406
 407 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 408 {
 409         MYSQL_RES *res;
 410
 411         int query_len = strlen (query);
 412
 413         if (mysql_real_query (con, query, query_len))
 414         {
 415                 ERROR ("mysql plugin: Failed to execute query: %s",
 416                                 mysql_error (con));
 417                 INFO ("mysql plugin: SQL query was: %s", query);
 418                 return (NULL);
 419         }
 420
 421         res = mysql_store_result (con);
 422         if (res == NULL)
 423         {
 424                 ERROR ("mysql plugin: Failed to store query result: %s",
 425                                 mysql_error (con));
 426                 INFO ("mysql plugin: SQL query was: %s", query);
 427                 return (NULL);
 428         }
 429
 430         return (res);
 431 } /* exec_query */
 432
 433 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 434 {
 435         MYSQL_RES *res;
 436         MYSQL_ROW  row;
 437
 438         const char *query;
 439         int         field_num;
 440         unsigned long long position;
 441
 442         query = "SHOW MASTER STATUS";
 443
 444         res = exec_query (con, query);
 445         if (res == NULL)
 446                 return (-1);
 447
 448         row = mysql_fetch_row (res);
 449         if (row == NULL)
 450         {
 451                 ERROR ("mysql plugin: Failed to get master statistics: "
 452                                 "`%s' did not return any rows.", query);
 453                 mysql_free_result (res);
 454                 return (-1);
 455         }
 456
 457         field_num = mysql_num_fields (res);
 458         if (field_num < 2)
 459         {
 460                 ERROR ("mysql plugin: Failed to get master statistics: "
 461                                 "`%s' returned less than two columns.", query);
 462                 mysql_free_result (res);
 463                 return (-1);
 464         }
 465
 466         position = atoll (row[1]);
 467         counter_submit ("mysql_log_position", "master-bin", position, db);
 468
 469         row = mysql_fetch_row (res);
 470         if (row != NULL)
 471                 WARNING ("mysql plugin: `%s' returned more than one row - "
 472                                 "ignoring further results.", query);
 473
 474         mysql_free_result (res);
 475
 476         return (0);
 477 } /* mysql_read_master_stats */
 478
 479 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 480 {
 481         MYSQL_RES *res;
 482         MYSQL_ROW  row;
 483
 484         const char *query;
 485         int         field_num;
 486
 487         /* WTF? libmysqlclient does not seem to provide any means to
 488          * translate a column name to a column index ... :-/ */
 489         const int READ_MASTER_LOG_POS_IDX   = 6;
 490         const int SLAVE_IO_RUNNING_IDX      = 10;
 491         const int SLAVE_SQL_RUNNING_IDX     = 11;
 492         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 493         const int SECONDS_BEHIND_MASTER_IDX = 32;
 494
 495         query = "SHOW SLAVE STATUS";
 496
 497         res = exec_query (con, query);
 498         if (res == NULL)
 499                 return (-1);
 500
 501         row = mysql_fetch_row (res);
 502         if (row == NULL)
 503         {
 504                 ERROR ("mysql plugin: Failed to get slave statistics: "
 505                                 "`%s' did not return any rows.", query);
 506                 mysql_free_result (res);
 507                 return (-1);
 508         }
 509
 510         field_num = mysql_num_fields (res);
 511         if (field_num < 33)
 512         {
 513                 ERROR ("mysql plugin: Failed to get slave statistics: "
 514                                 "`%s' returned less than 33 columns.", query);
 515                 mysql_free_result (res);
 516                 return (-1);
 517         }
 518
 519         if (db->slave_stats)
 520         {
 521                 unsigned long long counter;
 522                 double gauge;
 523
 524                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 525                 counter_submit ("mysql_log_position", "slave-read", counter, db);
 526
 527                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 528                 counter_submit ("mysql_log_position", "slave-exec", counter, db);
 529
 530                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 531                 {
 532                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 533                         gauge_submit ("time_offset", NULL, gauge, db);
 534                 }
 535         }
 536
 537         if (db->slave_notif)
 538         {
 539                 notification_t n = { 0, cdtime (), "", "",
 540                         "mysql", "", "time_offset", "", NULL };
 541
 542                 char *io, *sql;
 543
 544                 io  = row[SLAVE_IO_RUNNING_IDX];
 545                 sql = row[SLAVE_SQL_RUNNING_IDX];
 546
 547                 set_host (db, n.host, sizeof (n.host));
 548
 549                 /* Assured by "mysql_config_database" */
 550                 assert (db->instance != NULL);
 551                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 552
 553                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 554                                 && (db->slave_io_running))
 555                 {
 556                         n.severity = NOTIF_WARNING;
 557                         ssnprintf (n.message, sizeof (n.message),
 558                                         "slave I/O thread not started or not connected to master");
 559                         plugin_dispatch_notification (&n);
 560                         db->slave_io_running = 0;
 561                 }
 562                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 563                                 && (! db->slave_io_running))
 564                 {
 565                         n.severity = NOTIF_OKAY;
 566                         ssnprintf (n.message, sizeof (n.message),
 567                                         "slave I/O thread started and connected to master");
 568                         plugin_dispatch_notification (&n);
 569                         db->slave_io_running = 1;
 570                 }
 571
 572                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 573                                 && (db->slave_sql_running))
 574                 {
 575                         n.severity = NOTIF_WARNING;
 576                         ssnprintf (n.message, sizeof (n.message),
 577                                         "slave SQL thread not started");
 578                         plugin_dispatch_notification (&n);
 579                         db->slave_sql_running = 0;
 580                 }
 581                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 582                                 && (! db->slave_sql_running))
 583                 {
 584                         n.severity = NOTIF_OKAY;
 585                         ssnprintf (n.message, sizeof (n.message),
 586                                         "slave SQL thread started");
 587                         plugin_dispatch_notification (&n);
 588                         db->slave_sql_running = 1;
 589                 }
 590         }
 591
 592         row = mysql_fetch_row (res);
 593         if (row != NULL)
 594                 WARNING ("mysql plugin: `%s' returned more than one row - "
 595                                 "ignoring further results.", query);
 596
 597         mysql_free_result (res);
 598
 599         return (0);
 600 } /* mysql_read_slave_stats */
 601
 602 static int mysql_read_innodb_stats (mysql_database_t *db, MYSQL *con)
 603 {
 604         MYSQL_RES *res;
 605         MYSQL_ROW  row;
 606
 607         const char *query;
 608         struct {
 609                 const char *key;
 610                 const char *type;
 611                 int ds_type;
 612         } metrics[] = {
 613                 { "metadata_mem_pool_size",          "bytes",        DS_TYPE_GAUGE },
 614                 { "lock_deadlocks",                  "mysql_locks",  DS_TYPE_DERIVE },
 615                 { "lock_timeouts",                   "mysql_locks",  DS_TYPE_DERIVE },
 616                 { "lock_row_lock_current_waits",     "mysql_locks",  DS_TYPE_DERIVE },
 617                 { "buffer_pool_size",                "bytes",        DS_TYPE_GAUGE },
 618
 619                 { "os_log_bytes_written",            "operations",   DS_TYPE_DERIVE },
 620                 { "os_log_pending_fsyncs",           "operations",   DS_TYPE_DERIVE },
 621                 { "os_log_pending_writes",           "operations",   DS_TYPE_DERIVE },
 622
 623                 { "trx_rseg_history_len",            "gauge",        DS_TYPE_GAUGE },
 624
 625                 { "adaptive_hash_searches",          "operations",   DS_TYPE_DERIVE },
 626
 627                 { "file_num_open_files",             "gauge",        DS_TYPE_GAUGE },
 628
 629                 { "ibuf_merges_insert",              "operations",   DS_TYPE_DERIVE },
 630                 { "ibuf_merges_delete_mark",         "operations",   DS_TYPE_DERIVE },
 631                 { "ibuf_merges_delete",              "operations",   DS_TYPE_DERIVE },
 632                 { "ibuf_merges_discard_insert",      "operations",   DS_TYPE_DERIVE },
 633                 { "ibuf_merges_discard_delete_mark", "operations",   DS_TYPE_DERIVE },
 634                 { "ibuf_merges_discard_delete",      "operations",   DS_TYPE_DERIVE },
 635                 { "ibuf_merges_discard_merges",      "operations",   DS_TYPE_DERIVE },
 636                 { "ibuf_size",                       "bytes",        DS_TYPE_GAUGE },
 637
 638                 { "innodb_activity_count",           "gauge",        DS_TYPE_GAUGE },
 639
 640                 { "innodb_rwlock_s_spin_waits",      "operations",   DS_TYPE_DERIVE },
 641                 { "innodb_rwlock_x_spin_waits",      "operations",   DS_TYPE_DERIVE },
 642                 { "innodb_rwlock_s_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 643                 { "innodb_rwlock_x_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 644                 { "innodb_rwlock_s_os_waits",        "operations",   DS_TYPE_DERIVE },
 645                 { "innodb_rwlock_x_os_waits",        "operations",   DS_TYPE_DERIVE },
 646
 647                 { "dml_reads",                       "operations",   DS_TYPE_DERIVE },
 648                 { "dml_inserts",                     "operations",   DS_TYPE_DERIVE },
 649                 { "dml_deletes",                     "operations",   DS_TYPE_DERIVE },
 650                 { "dml_updates",                     "operations",   DS_TYPE_DERIVE },
 651
 652                 { NULL,                              NULL,           0}
 653         };
 654
 655         query = "SELECT name, count, type FROM information_schema.innodb_metrics WHERE status = 'enabled'";
 656
 657         res = exec_query (con, query);
 658         if (res == NULL)
 659                 return (-1);
 660
 661         while ((row = mysql_fetch_row (res)))
 662         {
 663                 int i;
 664                 char *key;
 665                 unsigned long long val;
 666
 667                 key = row[0];
 668                 val = atoll (row[1]);
 669
 670                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 671                         ;
 672
 673                 if (metrics[i].key == NULL)
 674                         continue;
 675
 676                 switch (metrics[i].ds_type) {
 677                         case DS_TYPE_COUNTER:
 678                                 counter_submit(metrics[i].type, key, (counter_t)val, db);
 679                                 break;
 680                         case DS_TYPE_GAUGE:
 681                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 682                                 break;
 683                         case DS_TYPE_DERIVE:
 684                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 685                                 break;
 686                 }
 687         }
 688
 689         mysql_free_result(res);
 690         return (0);
 691 }
 692
 693 static int mysql_read_wsrep_stats (mysql_database_t *db, MYSQL *con)
 694 {
 695         MYSQL_RES *res;
 696         MYSQL_ROW  row;
 697
 698         const char *query;
 699         struct {
 700                 const char *key;
 701                 const char *type;
 702                 int ds_type;
 703         } metrics[] = {
 704
 705                 { "wsrep_apply_oooe",                "operations",   DS_TYPE_DERIVE },
 706                 { "wsrep_apply_oool",                "operations",   DS_TYPE_DERIVE },
 707                 { "wsrep_causal_reads",              "operations",   DS_TYPE_DERIVE },
 708                 { "wsrep_commit_oooe",               "operations",   DS_TYPE_DERIVE },
 709                 { "wsrep_commit_oool",               "operations",   DS_TYPE_DERIVE },
 710                 { "wsrep_flow_control_recv",         "operations",   DS_TYPE_DERIVE },
 711                 { "wsrep_flow_control_sent",         "operations",   DS_TYPE_DERIVE },
 712                 { "wsrep_flow_control_paused",       "operations",   DS_TYPE_DERIVE },
 713                 { "wsrep_local_bf_aborts",           "operations",   DS_TYPE_DERIVE },
 714                 { "wsrep_local_cert_failures",       "operations",   DS_TYPE_DERIVE },
 715                 { "wsrep_local_commits",             "operations",   DS_TYPE_DERIVE },
 716                 { "wsrep_local_replays",             "operations",   DS_TYPE_DERIVE },
 717                 { "wsrep_received",                  "operations",   DS_TYPE_DERIVE },
 718                 { "wsrep_replicated",                "operations",   DS_TYPE_DERIVE },
 719
 720                 { "wsrep_received_bytes",            "total_bytes",  DS_TYPE_DERIVE },
 721                 { "wsrep_replicated_bytes",          "total_bytes",  DS_TYPE_DERIVE },
 722
 723                 { "wsrep_apply_window",              "gauge",        DS_TYPE_GAUGE },
 724                 { "wsrep_commit_window",             "gauge",        DS_TYPE_GAUGE },
 725
 726                 { "wsrep_cluster_size",              "gauge",        DS_TYPE_GAUGE },
 727                 { "wsrep_cert_deps_distance",        "gauge",        DS_TYPE_GAUGE },
 728
 729                 { "wsrep_local_recv_queue",          "queue_length", DS_TYPE_GAUGE },
 730                 { "wsrep_local_send_queue",          "queue_length", DS_TYPE_GAUGE },
 731
 732                 { NULL,                              NULL,           0}
 733
 734         };
 735
 736         query = "SHOW GLOBAL STATUS LIKE 'wsrep_%'";
 737
 738         res = exec_query (con, query);
 739         if (res == NULL)
 740                 return (-1);
 741
 742         row = mysql_fetch_row (res);
 743         if (row == NULL)
 744         {
 745                 ERROR ("mysql plugin: Failed to get wsrep statistics: "
 746                         "`%s' did not return any rows.", query);
 747                 mysql_free_result (res);
 748                 return (-1);
 749         }
 750
 751         while ((row = mysql_fetch_row (res)))
 752         {
 753                 int i;
 754                 char *key;
 755                 unsigned long long val;
 756
 757                 key = row[0];
 758                 val = atoll (row[1]);
 759
 760                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 761                         ;
 762
 763                 if (metrics[i].key == NULL)
 764                         continue;
 765
 766                 switch (metrics[i].ds_type) {
 767                         case DS_TYPE_GAUGE:
 768                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 769                                 break;
 770                         case DS_TYPE_DERIVE:
 771                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 772                                 break;
 773                 }
 774         }
 775
 776         mysql_free_result(res);
 777         return (0);
 778 } /* mysql_read_wsrep_stats */
 779
 780 static int mysql_read (user_data_t *ud)
 781 {
 782         mysql_database_t *db;
 783         MYSQL      *con;
 784         MYSQL_RES  *res;
 785         MYSQL_ROW   row;
 786         const char *query;
 787
 788         derive_t qcache_hits          = 0;
 789         derive_t qcache_inserts       = 0;
 790         derive_t qcache_not_cached    = 0;
 791         derive_t qcache_lowmem_prunes = 0;
 792         gauge_t qcache_queries_in_cache = NAN;
 793
 794         gauge_t threads_running   = NAN;
 795         gauge_t threads_connected = NAN;
 796         gauge_t threads_cached    = NAN;
 797         derive_t threads_created = 0;
 798
 799         unsigned long long traffic_incoming = 0ULL;
 800         unsigned long long traffic_outgoing = 0ULL;
 801         unsigned long mysql_version = 0ULL;
 802
 803         if ((ud == NULL) || (ud->data == NULL))
 804         {
 805                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 806                 return (-1);
 807         }
 808
 809         db = (mysql_database_t *) ud->data;
 810
 811         /* An error message will have been printed in this case */
 812         if ((con = getconnection (db)) == NULL)
 813                 return (-1);
 814
 815         mysql_version = mysql_get_server_version(con);
 816
 817         query = "SHOW STATUS";
 818         if (mysql_version >= 50002)
 819                 query = "SHOW GLOBAL STATUS";
 820
 821         res = exec_query (con, query);
 822         if (res == NULL)
 823                 return (-1);
 824
 825         while ((row = mysql_fetch_row (res)))
 826         {
 827                 char *key;
 828                 unsigned long long val;
 829
 830                 key = row[0];
 831                 val = atoll (row[1]);
 832
 833                 if (strncmp (key, "Com_",
 834                                   strlen ("Com_")) == 0)
 835                 {
 836                         if (val == 0ULL)
 837                                 continue;
 838
 839                         /* Ignore `prepared statements' */
 840                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 841                                 counter_submit ("mysql_commands",
 842                                                 key + strlen ("Com_"),
 843                                                 val, db);
 844                 }
 845                 else if (strncmp (key, "Handler_",
 846                                         strlen ("Handler_")) == 0)
 847                 {
 848                         if (val == 0ULL)
 849                                 continue;
 850
 851                         counter_submit ("mysql_handler",
 852                                         key + strlen ("Handler_"),
 853                                         val, db);
 854                 }
 855                 else if (strncmp (key, "Qcache_",
 856                                         strlen ("Qcache_")) == 0)
 857                 {
 858                         if (strcmp (key, "Qcache_hits") == 0)
 859                                 qcache_hits = (derive_t) val;
 860                         else if (strcmp (key, "Qcache_inserts") == 0)
 861                                 qcache_inserts = (derive_t) val;
 862                         else if (strcmp (key, "Qcache_not_cached") == 0)
 863                                 qcache_not_cached = (derive_t) val;
 864                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 865                                 qcache_lowmem_prunes = (derive_t) val;
 866                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 867                                 qcache_queries_in_cache = (gauge_t) val;
 868                 }
 869                 else if (strncmp (key, "Bytes_",
 870                                         strlen ("Bytes_")) == 0)
 871                 {
 872                         if (strcmp (key, "Bytes_received") == 0)
 873                                 traffic_incoming += val;
 874                         else if (strcmp (key, "Bytes_sent") == 0)
 875                                 traffic_outgoing += val;
 876                 }
 877                 else if (strncmp (key, "Threads_",
 878                                         strlen ("Threads_")) == 0)
 879                 {
 880                         if (strcmp (key, "Threads_running") == 0)
 881                                 threads_running = (gauge_t) val;
 882                         else if (strcmp (key, "Threads_connected") == 0)
 883                                 threads_connected = (gauge_t) val;
 884                         else if (strcmp (key, "Threads_cached") == 0)
 885                                 threads_cached = (gauge_t) val;
 886                         else if (strcmp (key, "Threads_created") == 0)
 887                                 threads_created = (derive_t) val;
 888                 }
 889                 else if (strncmp (key, "Table_locks_",
 890                                         strlen ("Table_locks_")) == 0)
 891                 {
 892                         counter_submit ("mysql_locks",
 893                                         key + strlen ("Table_locks_"),
 894                                         val, db);
 895                 }
 896                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 897                 {
 898                         /* buffer pool */
 899                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 900                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 901                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 902                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 903                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 904                                 counter_submit ("mysql_bpool_counters", "pages_flushed", val, db);
 905                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 906                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 907                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 908                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 909                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 910                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 911                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 912                                 counter_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 913                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 914                                 counter_submit ("mysql_bpool_counters", "read_ahead", val, db);
 915                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 916                                 counter_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 917                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 918                                 counter_submit ("mysql_bpool_counters", "read_requests", val, db);
 919                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 920                                 counter_submit ("mysql_bpool_counters", "reads", val, db);
 921                         else if (strcmp (key, "Innodb_buffer_pool_wait_free") == 0)
 922                                 counter_submit ("mysql_bpool_counters", "wait_free", val, db);
 923                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 924                                 counter_submit ("mysql_bpool_counters", "write_requests", val, db);
 925                         else if (strcmp (key, "Innodb_buffer_pool_bytes_data") == 0)
 926                                 gauge_submit ("mysql_bpool_bytes", "data", val, db);
 927                         else if (strcmp (key, "Innodb_buffer_pool_bytes_dirty") == 0)
 928                                 gauge_submit ("mysql_bpool_bytes", "dirty", val, db);
 929
 930                         /* data */
 931                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 932                                 counter_submit ("mysql_innodb_data", "fsyncs", val, db);
 933                         else if (strcmp (key, "Innodb_data_read") == 0)
 934                                 counter_submit ("mysql_innodb_data", "read", val, db);
 935                         else if (strcmp (key, "Innodb_data_reads") == 0)
 936                                 counter_submit ("mysql_innodb_data", "reads", val, db);
 937                         else if (strcmp (key, "Innodb_data_writes") == 0)
 938                                 counter_submit ("mysql_innodb_data", "writes", val, db);
 939                         else if (strcmp (key, "Innodb_data_written") == 0)
 940                                 counter_submit ("mysql_innodb_data", "written", val, db);
 941
 942                         /* double write */
 943                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 944                                 counter_submit ("mysql_innodb_dblwr", "writes", val, db);
 945                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 946                                 counter_submit ("mysql_innodb_dblwr", "written", val, db);
 947                         else if (strcmp (key, "Innodb_dblwr_page_size") == 0)
 948                                 gauge_submit ("mysql_innodb_dblwr", "page_size", val, db);
 949
 950                         /* log */
 951                         else if (strcmp (key, "Innodb_log_waits") == 0)
 952                                 counter_submit ("mysql_innodb_log", "waits", val, db);
 953                         else if (strcmp (key, "Innodb_log_write_requests") == 0)
 954                                 counter_submit ("mysql_innodb_log", "write_requests", val, db);
 955                         else if (strcmp (key, "Innodb_log_writes") == 0)
 956                                 counter_submit ("mysql_innodb_log", "writes", val, db);
 957                         else if (strcmp (key, "Innodb_os_log_fsyncs") == 0)
 958                                 counter_submit ("mysql_innodb_log", "fsyncs", val, db);
 959                         else if (strcmp (key, "Innodb_os_log_written") == 0)
 960                                 counter_submit ("mysql_innodb_log", "written", val, db);
 961
 962                         /* pages */
 963                         else if (strcmp (key, "Innodb_pages_created") == 0)
 964                                 counter_submit ("mysql_innodb_pages", "created", val, db);
 965                         else if (strcmp (key, "Innodb_pages_read") == 0)
 966                                 counter_submit ("mysql_innodb_pages", "read", val, db);
 967                         else if (strcmp (key, "Innodb_pages_written") == 0)
 968                                 counter_submit ("mysql_innodb_pages", "written", val, db);
 969
 970                         /* row lock */
 971                         else if (strcmp (key, "Innodb_row_lock_time") == 0)
 972                                 counter_submit ("mysql_innodb_row_lock", "time", val, db);
 973                         else if (strcmp (key, "Innodb_row_lock_waits") == 0)
 974                                 counter_submit ("mysql_innodb_row_lock", "waits", val, db);
 975
 976                         /* rows */
 977                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 978                                 counter_submit ("mysql_innodb_rows", "deleted", val, db);
 979                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 980                                 counter_submit ("mysql_innodb_rows", "inserted", val, db);
 981                         else if (strcmp (key, "Innodb_rows_read") == 0)
 982                                 counter_submit ("mysql_innodb_rows", "read", val, db);
 983                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 984                                 counter_submit ("mysql_innodb_rows", "updated", val, db);
 985                 }
 986                 else if (strncmp (key, "Select_", strlen ("Select_")) == 0)
 987                 {
 988                         counter_submit ("mysql_select", key + strlen ("Select_"),
 989                                         val, db);
 990                 }
 991                 else if (strncmp (key, "Sort_", strlen ("Sort_")) == 0)
 992                 {
 993                         if (strcmp (key, "Sort_merge_passes") == 0)
 994                                 counter_submit ("mysql_sort_merge_passes", NULL, val, db);
 995                         else if (strcmp (key, "Sort_rows") == 0)
 996                                 counter_submit ("mysql_sort_rows", NULL, val, db);
 997                         else if (strcmp (key, "Sort_range") == 0)
 998                                 counter_submit ("mysql_sort", "range", val, db);
 999                         else if (strcmp (key, "Sort_scan") == 0)
1000                                 counter_submit ("mysql_sort", "scan", val, db);
1001
1002                 }
1003                 else if (strncmp (key, "Slow_queries", strlen ("Slow_queries")) == 0)
1004                 {
1005                         counter_submit ("mysql_slow_queries", NULL , val, db);
1006                 }
1007         }
1008         mysql_free_result (res); res = NULL;
1009
1010         if ((qcache_hits != 0)
1011                         || (qcache_inserts != 0)
1012                         || (qcache_not_cached != 0)
1013                         || (qcache_lowmem_prunes != 0))
1014         {
1015                 derive_submit ("cache_result", "qcache-hits",
1016                                 qcache_hits, db);
1017                 derive_submit ("cache_result", "qcache-inserts",
1018                                 qcache_inserts, db);
1019                 derive_submit ("cache_result", "qcache-not_cached",
1020                                 qcache_not_cached, db);
1021                 derive_submit ("cache_result", "qcache-prunes",
1022                                 qcache_lowmem_prunes, db);
1023
1024                 gauge_submit ("cache_size", "qcache",
1025                                 qcache_queries_in_cache, db);
1026         }
1027
1028         if (threads_created != 0)
1029         {
1030                 gauge_submit ("threads", "running",
1031                                 threads_running, db);
1032                 gauge_submit ("threads", "connected",
1033                                 threads_connected, db);
1034                 gauge_submit ("threads", "cached",
1035                                 threads_cached, db);
1036
1037                 derive_submit ("total_threads", "created",
1038                                 threads_created, db);
1039         }
1040
1041         traffic_submit  (traffic_incoming, traffic_outgoing, db);
1042
1043         if (mysql_version >= 50600 && db->innodb_stats)
1044                 mysql_read_innodb_stats (db, con);
1045
1046         if (db->master_stats)
1047                 mysql_read_master_stats (db, con);
1048
1049         if ((db->slave_stats) || (db->slave_notif))
1050                 mysql_read_slave_stats (db, con);
1051
1052         if (db->wsrep_stats)
1053                 mysql_read_wsrep_stats (db, con);
1054
1055         return (0);
1056 } /* int mysql_read */
1057
1058 void module_register (void)
1059 {
1060         plugin_register_complex_config ("mysql", mysql_config);
1061 } /* void module_register */