src/mysql.c

   1 /**
   2  * collectd - src/mysql.c
   3  * Copyright (C) 2006-2010  Florian octo Forster
   4  * Copyright (C) 2008       Mirko Buffoni
   5  * Copyright (C) 2009       Doug MacEachern
   6  * Copyright (C) 2009       Sebastian tokkee Harl
   7  * Copyright (C) 2009       Rodolphe Quiédeville
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; only version 2 of the License is applicable.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  *
  22  * Authors:
  23  *   Florian octo Forster <octo at collectd.org>
  24  *   Mirko Buffoni <briareos at eswat.org>
  25  *   Doug MacEachern <dougm at hyperic.com>
  26  *   Sebastian tokkee Harl <sh at tokkee.org>
  27  *   Rodolphe Quiédeville <rquiedeville at bearstech.com>
  28  **/
  29
  30 #include "collectd.h"
  31
  32 #include "common.h"
  33 #include "plugin.h"
  34 #include "configfile.h"
  35
  36 #ifdef HAVE_MYSQL_H
  37 #include <mysql.h>
  38 #elif defined(HAVE_MYSQL_MYSQL_H)
  39 #include <mysql/mysql.h>
  40 #endif
  41
  42 struct mysql_database_s /* {{{ */
  43 {
  44         char *instance;
  45         char *alias;
  46         char *host;
  47         char *user;
  48         char *pass;
  49         char *database;
  50         char *socket;
  51         int   port;
  52         int   timeout;
  53
  54         _Bool master_stats;
  55         _Bool slave_stats;
  56         _Bool innodb_stats;
  57         _Bool wsrep_stats;
  58
  59         _Bool slave_notif;
  60         _Bool slave_io_running;
  61         _Bool slave_sql_running;
  62
  63         MYSQL *con;
  64         _Bool  is_connected;
  65 };
  66 typedef struct mysql_database_s mysql_database_t; /* }}} */
  67
  68 static int mysql_read (user_data_t *ud);
  69
  70 static void mysql_database_free (void *arg) /* {{{ */
  71 {
  72         mysql_database_t *db;
  73
  74         DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
  75
  76         db = arg;
  77
  78         if (db == NULL)
  79                 return;
  80
  81         if (db->con != NULL)
  82                 mysql_close (db->con);
  83
  84         sfree (db->alias);
  85         sfree (db->host);
  86         sfree (db->user);
  87         sfree (db->pass);
  88         sfree (db->socket);
  89         sfree (db->instance);
  90         sfree (db->database);
  91         sfree (db);
  92 } /* }}} void mysql_database_free */
  93
  94 /* Configuration handling functions {{{
  95  *
  96  * <Plugin mysql>
  97  *   <Database "plugin_instance1">
  98  *     Host "localhost"
  99  *     Port 22000
 100  *     ...
 101  *   </Database>
 102  * </Plugin>
 103  */
 104 static int mysql_config_database (oconfig_item_t *ci) /* {{{ */
 105 {
 106         mysql_database_t *db;
 107         int status = 0;
 108         int i;
 109
 110         if ((ci->values_num != 1)
 111             || (ci->values[0].type != OCONFIG_TYPE_STRING))
 112         {
 113                 WARNING ("mysql plugin: The `Database' block "
 114                          "needs exactly one string argument.");
 115                 return (-1);
 116         }
 117
 118         db = calloc (1, sizeof (*db));
 119         if (db == NULL)
 120         {
 121                 ERROR ("mysql plugin: calloc failed.");
 122                 return (-1);
 123         }
 124
 125         /* initialize all the pointers */
 126         db->alias    = NULL;
 127         db->host     = NULL;
 128         db->user     = NULL;
 129         db->pass     = NULL;
 130         db->database = NULL;
 131         db->socket   = NULL;
 132         db->con      = NULL;
 133         db->timeout  = 0;
 134
 135         /* trigger a notification, if it's not running */
 136         db->slave_io_running  = 1;
 137         db->slave_sql_running = 1;
 138
 139         status = cf_util_get_string (ci, &db->instance);
 140         if (status != 0)
 141         {
 142                 sfree (db);
 143                 return (status);
 144         }
 145         assert (db->instance != NULL);
 146
 147         /* Fill the `mysql_database_t' structure.. */
 148         for (i = 0; i < ci->children_num; i++)
 149         {
 150                 oconfig_item_t *child = ci->children + i;
 151
 152                 if (strcasecmp ("Alias", child->key) == 0)
 153                         status = cf_util_get_string (child, &db->alias);
 154                 else if (strcasecmp ("Host", child->key) == 0)
 155                         status = cf_util_get_string (child, &db->host);
 156                 else if (strcasecmp ("User", child->key) == 0)
 157                         status = cf_util_get_string (child, &db->user);
 158                 else if (strcasecmp ("Password", child->key) == 0)
 159                         status = cf_util_get_string (child, &db->pass);
 160                 else if (strcasecmp ("Port", child->key) == 0)
 161                 {
 162                         status = cf_util_get_port_number (child);
 163                         if (status > 0)
 164                         {
 165                                 db->port = status;
 166                                 status = 0;
 167                         }
 168                 }
 169                 else if (strcasecmp ("Socket", child->key) == 0)
 170                         status = cf_util_get_string (child, &db->socket);
 171                 else if (strcasecmp ("Database", child->key) == 0)
 172                         status = cf_util_get_string (child, &db->database);
 173                 else if (strcasecmp ("ConnectTimeout", child->key) == 0)
 174                         status = cf_util_get_int (child, &db->timeout);
 175                 else if (strcasecmp ("MasterStats", child->key) == 0)
 176                         status = cf_util_get_boolean (child, &db->master_stats);
 177                 else if (strcasecmp ("SlaveStats", child->key) == 0)
 178                         status = cf_util_get_boolean (child, &db->slave_stats);
 179                 else if (strcasecmp ("SlaveNotifications", child->key) == 0)
 180                         status = cf_util_get_boolean (child, &db->slave_notif);
 181                 else if (strcasecmp ("InnodbStats", child->key) == 0)
 182                         status = cf_util_get_boolean (child, &db->innodb_stats);
 183                 else if (strcasecmp ("WsrepStats", child->key) == 0)
 184                         status = cf_util_get_boolean (child, &db->wsrep_stats);
 185                 else
 186                 {
 187                         WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
 188                         status = -1;
 189                 }
 190
 191                 if (status != 0)
 192                         break;
 193         }
 194
 195         /* If all went well, register this database for reading */
 196         if (status == 0)
 197         {
 198                 user_data_t ud = { 0 };
 199                 char cb_name[DATA_MAX_NAME_LEN];
 200
 201                 DEBUG ("mysql plugin: Registering new read callback: %s",
 202                                 (db->database != NULL) ? db->database : "<default>");
 203
 204                 ud.data = (void *) db;
 205                 ud.free_func = mysql_database_free;
 206
 207                 if (db->instance != NULL)
 208                         ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
 209                                         db->instance);
 210                 else
 211                         sstrncpy (cb_name, "mysql", sizeof (cb_name));
 212
 213                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 214                                               mysql_read,
 215                                               /* interval = */ 0, &ud);
 216         }
 217         else
 218         {
 219                 mysql_database_free (db);
 220                 return (-1);
 221         }
 222
 223         return (0);
 224 } /* }}} int mysql_config_database */
 225
 226 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 227 {
 228         int i;
 229
 230         if (ci == NULL)
 231                 return (EINVAL);
 232
 233         /* Fill the `mysql_database_t' structure.. */
 234         for (i = 0; i < ci->children_num; i++)
 235         {
 236                 oconfig_item_t *child = ci->children + i;
 237
 238                 if (strcasecmp ("Database", child->key) == 0)
 239                         mysql_config_database (child);
 240                 else
 241                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 242                                         child->key);
 243         }
 244
 245         return (0);
 246 } /* }}} int mysql_config */
 247
 248 /* }}} End of configuration handling functions */
 249
 250 static MYSQL *getconnection (mysql_database_t *db)
 251 {
 252         if (db->is_connected)
 253         {
 254                 int status;
 255
 256                 status = mysql_ping (db->con);
 257                 if (status == 0)
 258                         return (db->con);
 259
 260                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 261                                 db->instance, mysql_error (db->con));
 262         }
 263         db->is_connected = 0;
 264
 265         if (db->con == NULL)
 266         {
 267                 db->con = mysql_init (NULL);
 268                 if (db->con == NULL)
 269                 {
 270                         ERROR ("mysql plugin: mysql_init failed: %s",
 271                                         mysql_error (db->con));
 272                         return (NULL);
 273                 }
 274         }
 275
 276         /* Configure TCP connect timeout (default: 0) */
 277         db->con->options.connect_timeout = db->timeout;
 278
 279         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 280                                 db->database, db->port, db->socket, 0) == NULL)
 281         {
 282                 ERROR ("mysql plugin: Failed to connect to database %s "
 283                                 "at server %s: %s",
 284                                 (db->database != NULL) ? db->database : "<none>",
 285                                 (db->host != NULL) ? db->host : "localhost",
 286                                 mysql_error (db->con));
 287                 return (NULL);
 288         }
 289
 290         INFO ("mysql plugin: Successfully connected to database %s "
 291                         "at server %s (server version: %s, protocol version: %d)",
 292                         (db->database != NULL) ? db->database : "<none>",
 293                         mysql_get_host_info (db->con),
 294                         mysql_get_server_info (db->con),
 295                         mysql_get_proto_info (db->con));
 296
 297         db->is_connected = 1;
 298         return (db->con);
 299 } /* static MYSQL *getconnection (mysql_database_t *db) */
 300
 301 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 302 {
 303         if (db->alias)
 304                 sstrncpy (buf, db->alias, buflen);
 305         else if ((db->host == NULL)
 306                         || (strcmp ("", db->host) == 0)
 307                         || (strcmp ("127.0.0.1", db->host) == 0)
 308                         || (strcmp ("localhost", db->host) == 0))
 309                 sstrncpy (buf, hostname_g, buflen);
 310         else
 311                 sstrncpy (buf, db->host, buflen);
 312 } /* void set_host */
 313
 314 static void submit (const char *type, const char *type_instance,
 315                 value_t *values, size_t values_len, mysql_database_t *db)
 316 {
 317         value_list_t vl = VALUE_LIST_INIT;
 318
 319         vl.values     = values;
 320         vl.values_len = values_len;
 321
 322         set_host (db, vl.host, sizeof (vl.host));
 323
 324         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 325
 326         /* Assured by "mysql_config_database" */
 327         assert (db->instance != NULL);
 328         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 329
 330         sstrncpy (vl.type, type, sizeof (vl.type));
 331         if (type_instance != NULL)
 332                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 333
 334         plugin_dispatch_values (&vl);
 335 } /* submit */
 336
 337 static void counter_submit (const char *type, const char *type_instance,
 338                 derive_t value, mysql_database_t *db)
 339 {
 340         value_t values[1];
 341
 342         values[0].derive = value;
 343         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 344 } /* void counter_submit */
 345
 346 static void gauge_submit (const char *type, const char *type_instance,
 347                 gauge_t value, mysql_database_t *db)
 348 {
 349         value_t values[1];
 350
 351         values[0].gauge = value;
 352         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 353 } /* void gauge_submit */
 354
 355 static void derive_submit (const char *type, const char *type_instance,
 356                 derive_t value, mysql_database_t *db)
 357 {
 358         value_t values[1];
 359
 360         values[0].derive = value;
 361         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 362 } /* void derive_submit */
 363
 364 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 365 {
 366         value_t values[2];
 367
 368         values[0].derive = rx;
 369         values[1].derive = tx;
 370
 371         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 372 } /* void traffic_submit */
 373
 374 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 375 {
 376         MYSQL_RES *res;
 377
 378         int query_len = strlen (query);
 379
 380         if (mysql_real_query (con, query, query_len))
 381         {
 382                 ERROR ("mysql plugin: Failed to execute query: %s",
 383                                 mysql_error (con));
 384                 INFO ("mysql plugin: SQL query was: %s", query);
 385                 return (NULL);
 386         }
 387
 388         res = mysql_store_result (con);
 389         if (res == NULL)
 390         {
 391                 ERROR ("mysql plugin: Failed to store query result: %s",
 392                                 mysql_error (con));
 393                 INFO ("mysql plugin: SQL query was: %s", query);
 394                 return (NULL);
 395         }
 396
 397         return (res);
 398 } /* exec_query */
 399
 400 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 401 {
 402         MYSQL_RES *res;
 403         MYSQL_ROW  row;
 404
 405         const char *query;
 406         int         field_num;
 407         unsigned long long position;
 408
 409         query = "SHOW MASTER STATUS";
 410
 411         res = exec_query (con, query);
 412         if (res == NULL)
 413                 return (-1);
 414
 415         row = mysql_fetch_row (res);
 416         if (row == NULL)
 417         {
 418                 ERROR ("mysql plugin: Failed to get master statistics: "
 419                                 "`%s' did not return any rows.", query);
 420                 mysql_free_result (res);
 421                 return (-1);
 422         }
 423
 424         field_num = mysql_num_fields (res);
 425         if (field_num < 2)
 426         {
 427                 ERROR ("mysql plugin: Failed to get master statistics: "
 428                                 "`%s' returned less than two columns.", query);
 429                 mysql_free_result (res);
 430                 return (-1);
 431         }
 432
 433         position = atoll (row[1]);
 434         counter_submit ("mysql_log_position", "master-bin", position, db);
 435
 436         row = mysql_fetch_row (res);
 437         if (row != NULL)
 438                 WARNING ("mysql plugin: `%s' returned more than one row - "
 439                                 "ignoring further results.", query);
 440
 441         mysql_free_result (res);
 442
 443         return (0);
 444 } /* mysql_read_master_stats */
 445
 446 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 447 {
 448         MYSQL_RES *res;
 449         MYSQL_ROW  row;
 450
 451         const char *query;
 452         int         field_num;
 453
 454         /* WTF? libmysqlclient does not seem to provide any means to
 455          * translate a column name to a column index ... :-/ */
 456         const int READ_MASTER_LOG_POS_IDX   = 6;
 457         const int SLAVE_IO_RUNNING_IDX      = 10;
 458         const int SLAVE_SQL_RUNNING_IDX     = 11;
 459         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 460         const int SECONDS_BEHIND_MASTER_IDX = 32;
 461
 462         query = "SHOW SLAVE STATUS";
 463
 464         res = exec_query (con, query);
 465         if (res == NULL)
 466                 return (-1);
 467
 468         row = mysql_fetch_row (res);
 469         if (row == NULL)
 470         {
 471                 ERROR ("mysql plugin: Failed to get slave statistics: "
 472                                 "`%s' did not return any rows.", query);
 473                 mysql_free_result (res);
 474                 return (-1);
 475         }
 476
 477         field_num = mysql_num_fields (res);
 478         if (field_num < 33)
 479         {
 480                 ERROR ("mysql plugin: Failed to get slave statistics: "
 481                                 "`%s' returned less than 33 columns.", query);
 482                 mysql_free_result (res);
 483                 return (-1);
 484         }
 485
 486         if (db->slave_stats)
 487         {
 488                 unsigned long long counter;
 489                 double gauge;
 490
 491                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 492                 counter_submit ("mysql_log_position", "slave-read", counter, db);
 493
 494                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 495                 counter_submit ("mysql_log_position", "slave-exec", counter, db);
 496
 497                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 498                 {
 499                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 500                         gauge_submit ("time_offset", NULL, gauge, db);
 501                 }
 502         }
 503
 504         if (db->slave_notif)
 505         {
 506                 notification_t n = { 0, cdtime (), "", "",
 507                         "mysql", "", "time_offset", "", NULL };
 508
 509                 char *io, *sql;
 510
 511                 io  = row[SLAVE_IO_RUNNING_IDX];
 512                 sql = row[SLAVE_SQL_RUNNING_IDX];
 513
 514                 set_host (db, n.host, sizeof (n.host));
 515
 516                 /* Assured by "mysql_config_database" */
 517                 assert (db->instance != NULL);
 518                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 519
 520                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 521                                 && (db->slave_io_running))
 522                 {
 523                         n.severity = NOTIF_WARNING;
 524                         ssnprintf (n.message, sizeof (n.message),
 525                                         "slave I/O thread not started or not connected to master");
 526                         plugin_dispatch_notification (&n);
 527                         db->slave_io_running = 0;
 528                 }
 529                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 530                                 && (! db->slave_io_running))
 531                 {
 532                         n.severity = NOTIF_OKAY;
 533                         ssnprintf (n.message, sizeof (n.message),
 534                                         "slave I/O thread started and connected to master");
 535                         plugin_dispatch_notification (&n);
 536                         db->slave_io_running = 1;
 537                 }
 538
 539                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 540                                 && (db->slave_sql_running))
 541                 {
 542                         n.severity = NOTIF_WARNING;
 543                         ssnprintf (n.message, sizeof (n.message),
 544                                         "slave SQL thread not started");
 545                         plugin_dispatch_notification (&n);
 546                         db->slave_sql_running = 0;
 547                 }
 548                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 549                                 && (! db->slave_sql_running))
 550                 {
 551                         n.severity = NOTIF_OKAY;
 552                         ssnprintf (n.message, sizeof (n.message),
 553                                         "slave SQL thread started");
 554                         plugin_dispatch_notification (&n);
 555                         db->slave_sql_running = 1;
 556                 }
 557         }
 558
 559         row = mysql_fetch_row (res);
 560         if (row != NULL)
 561                 WARNING ("mysql plugin: `%s' returned more than one row - "
 562                                 "ignoring further results.", query);
 563
 564         mysql_free_result (res);
 565
 566         return (0);
 567 } /* mysql_read_slave_stats */
 568
 569 static int mysql_read_innodb_stats (mysql_database_t *db, MYSQL *con)
 570 {
 571         MYSQL_RES *res;
 572         MYSQL_ROW  row;
 573
 574         const char *query;
 575         struct {
 576                 const char *key;
 577                 const char *type;
 578                 int ds_type;
 579         } metrics[] = {
 580                 { "metadata_mem_pool_size",          "bytes",        DS_TYPE_GAUGE },
 581                 { "lock_deadlocks",                  "mysql_locks",  DS_TYPE_DERIVE },
 582                 { "lock_timeouts",                   "mysql_locks",  DS_TYPE_DERIVE },
 583                 { "lock_row_lock_current_waits",     "mysql_locks",  DS_TYPE_DERIVE },
 584                 { "buffer_pool_size",                "bytes",        DS_TYPE_GAUGE },
 585
 586                 { "buffer_pool_reads",               "operations",   DS_TYPE_DERIVE },
 587                 { "buffer_pool_read_requests",       "operations",   DS_TYPE_DERIVE },
 588                 { "buffer_pool_write_requests",      "operations",   DS_TYPE_DERIVE },
 589                 { "buffer_pool_wait_free",           "operations",   DS_TYPE_DERIVE },
 590                 { "buffer_pool_read_ahead",          "operations",   DS_TYPE_DERIVE },
 591                 { "buffer_pool_read_ahead_evicted",  "operations",   DS_TYPE_DERIVE },
 592
 593                 { "buffer_pool_pages_total",         "gauge",        DS_TYPE_GAUGE },
 594                 { "buffer_pool_pages_misc",          "gauge",        DS_TYPE_GAUGE },
 595                 { "buffer_pool_pages_data",          "gauge",        DS_TYPE_GAUGE },
 596                 { "buffer_pool_bytes_data",          "gauge",        DS_TYPE_GAUGE },
 597                 { "buffer_pool_pages_dirty",         "gauge",        DS_TYPE_GAUGE },
 598                 { "buffer_pool_bytes_dirty",         "gauge",        DS_TYPE_GAUGE },
 599                 { "buffer_pool_pages_free",          "gauge",        DS_TYPE_GAUGE },
 600
 601                 { "buffer_pages_created",            "operations",   DS_TYPE_DERIVE },
 602                 { "buffer_pages_written",            "operations",   DS_TYPE_DERIVE },
 603                 { "buffer_pages_read",               "operations",   DS_TYPE_DERIVE },
 604                 { "buffer_data_reads",               "operations",   DS_TYPE_DERIVE },
 605                 { "buffer_data_written",             "operations",   DS_TYPE_DERIVE },
 606
 607                 { "os_data_reads",                   "operations",   DS_TYPE_DERIVE },
 608                 { "os_data_writes",                  "operations",   DS_TYPE_DERIVE },
 609                 { "os_data_fsyncs",                  "operations",   DS_TYPE_DERIVE },
 610                 { "os_log_bytes_written",            "operations",   DS_TYPE_DERIVE },
 611                 { "os_log_fsyncs",                   "operations",   DS_TYPE_DERIVE },
 612                 { "os_log_pending_fsyncs",           "operations",   DS_TYPE_DERIVE },
 613                 { "os_log_pending_writes",           "operations",   DS_TYPE_DERIVE },
 614
 615                 { "trx_rseg_history_len",            "gauge",        DS_TYPE_GAUGE },
 616
 617                 { "log_waits",                       "operations",   DS_TYPE_DERIVE },
 618                 { "log_write_requests",              "operations",   DS_TYPE_DERIVE },
 619                 { "log_writes",                      "operations",   DS_TYPE_DERIVE },
 620                 { "adaptive_hash_searches",          "operations",   DS_TYPE_DERIVE },
 621
 622                 { "file_num_open_files",             "gauge",        DS_TYPE_GAUGE },
 623
 624                 { "ibuf_merges_insert",              "operations",   DS_TYPE_DERIVE },
 625                 { "ibuf_merges_delete_mark",         "operations",   DS_TYPE_DERIVE },
 626                 { "ibuf_merges_delete",              "operations",   DS_TYPE_DERIVE },
 627                 { "ibuf_merges_discard_insert",      "operations",   DS_TYPE_DERIVE },
 628                 { "ibuf_merges_discard_delete_mark", "operations",   DS_TYPE_DERIVE },
 629                 { "ibuf_merges_discard_delete",      "operations",   DS_TYPE_DERIVE },
 630                 { "ibuf_merges_discard_merges",      "operations",   DS_TYPE_DERIVE },
 631                 { "ibuf_size",                       "bytes",        DS_TYPE_GAUGE },
 632
 633                 { "innodb_activity_count",           "gauge",        DS_TYPE_GAUGE },
 634                 { "innodb_dblwr_writes",             "operations",   DS_TYPE_DERIVE },
 635                 { "innodb_dblwr_pages_written",      "operations",   DS_TYPE_DERIVE },
 636                 { "innodb_dblwr_page_size",          "gauge",        DS_TYPE_GAUGE },
 637
 638                 { "innodb_rwlock_s_spin_waits",      "operations",   DS_TYPE_DERIVE },
 639                 { "innodb_rwlock_x_spin_waits",      "operations",   DS_TYPE_DERIVE },
 640                 { "innodb_rwlock_s_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 641                 { "innodb_rwlock_x_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 642                 { "innodb_rwlock_s_os_waits",        "operations",   DS_TYPE_DERIVE },
 643                 { "innodb_rwlock_x_os_waits",        "operations",   DS_TYPE_DERIVE },
 644
 645                 { "dml_reads",                       "operations",   DS_TYPE_DERIVE },
 646                 { "dml_inserts",                     "operations",   DS_TYPE_DERIVE },
 647                 { "dml_deletes",                     "operations",   DS_TYPE_DERIVE },
 648                 { "dml_updates",                     "operations",   DS_TYPE_DERIVE },
 649
 650                 { NULL,                              NULL,           0}
 651         };
 652
 653         query = "SELECT name, count, type FROM information_schema.innodb_metrics WHERE status = 'enabled'";
 654
 655         res = exec_query (con, query);
 656         if (res == NULL)
 657                 return (-1);
 658
 659         while ((row = mysql_fetch_row (res)))
 660         {
 661                 int i;
 662                 char *key;
 663                 unsigned long long val;
 664
 665                 key = row[0];
 666                 val = atoll (row[1]);
 667
 668                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 669                         ;
 670
 671                 if (metrics[i].key == NULL)
 672                         continue;
 673
 674                 switch (metrics[i].ds_type) {
 675                         case DS_TYPE_COUNTER:
 676                                 counter_submit(metrics[i].type, key, (counter_t)val, db);
 677                                 break;
 678                         case DS_TYPE_GAUGE:
 679                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 680                                 break;
 681                         case DS_TYPE_DERIVE:
 682                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 683                                 break;
 684                 }
 685         }
 686
 687         mysql_free_result(res);
 688         return (0);
 689 }
 690
 691 static int mysql_read_wsrep_stats (mysql_database_t *db, MYSQL *con)
 692 {
 693         MYSQL_RES *res;
 694         MYSQL_ROW  row;
 695
 696         const char *query;
 697         struct {
 698                 const char *key;
 699                 const char *type;
 700                 int ds_type;
 701         } metrics[] = {
 702
 703                 { "wsrep_apply_oooe",                "operations",   DS_TYPE_DERIVE },
 704                 { "wsrep_apply_oool",                "operations",   DS_TYPE_DERIVE },
 705                 { "wsrep_causal_reads",              "operations",   DS_TYPE_DERIVE },
 706                 { "wsrep_commit_oooe",               "operations",   DS_TYPE_DERIVE },
 707                 { "wsrep_commit_oool",               "operations",   DS_TYPE_DERIVE },
 708                 { "wsrep_flow_control_recv",         "operations",   DS_TYPE_DERIVE },
 709                 { "wsrep_flow_control_sent",         "operations",   DS_TYPE_DERIVE },
 710                 { "wsrep_flow_control_paused",       "operations",   DS_TYPE_DERIVE },
 711                 { "wsrep_local_bf_aborts",           "operations",   DS_TYPE_DERIVE },
 712                 { "wsrep_local_cert_failures",       "operations",   DS_TYPE_DERIVE },
 713                 { "wsrep_local_commits",             "operations",   DS_TYPE_DERIVE },
 714                 { "wsrep_local_replays",             "operations",   DS_TYPE_DERIVE },
 715                 { "wsrep_received",                  "operations",   DS_TYPE_DERIVE },
 716                 { "wsrep_replicated",                "operations",   DS_TYPE_DERIVE },
 717
 718                 { "wsrep_received_bytes",            "total_bytes",  DS_TYPE_DERIVE },
 719                 { "wsrep_replicated_bytes",          "total_bytes",  DS_TYPE_DERIVE },
 720
 721                 { "wsrep_apply_window",              "gauge",        DS_TYPE_GAUGE },
 722                 { "wsrep_commit_window",             "gauge",        DS_TYPE_GAUGE },
 723
 724                 { "wsrep_cluster_size",              "gauge",        DS_TYPE_GAUGE },
 725                 { "wsrep_cert_deps_distance",        "gauge",        DS_TYPE_GAUGE },
 726
 727                 { "wsrep_local_recv_queue",          "queue_length", DS_TYPE_GAUGE },
 728                 { "wsrep_local_send_queue",          "queue_length", DS_TYPE_GAUGE },
 729
 730                 { NULL,                              NULL,           0}
 731
 732         };
 733
 734         query = "SHOW GLOBAL STATUS LIKE 'wsrep_%'";
 735
 736         res = exec_query (con, query);
 737         if (res == NULL)
 738                 return (-1);
 739
 740         row = mysql_fetch_row (res);
 741         if (row == NULL)
 742         {
 743                 ERROR ("mysql plugin: Failed to get wsrep statistics: "
 744                         "`%s' did not return any rows.", query);
 745                 mysql_free_result (res);
 746                 return (-1);
 747         }
 748
 749         while ((row = mysql_fetch_row (res)))
 750         {
 751                 int i;
 752                 char *key;
 753                 unsigned long long val;
 754
 755                 key = row[0];
 756                 val = atoll (row[1]);
 757
 758                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 759                         ;
 760
 761                 if (metrics[i].key == NULL)
 762                         continue;
 763
 764                 switch (metrics[i].ds_type) {
 765                         case DS_TYPE_GAUGE:
 766                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 767                                 break;
 768                         case DS_TYPE_DERIVE:
 769                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 770                                 break;
 771                 }
 772         }
 773
 774         mysql_free_result(res);
 775         return (0);
 776 } /* mysql_read_wsrep_stats */
 777
 778 static int mysql_read (user_data_t *ud)
 779 {
 780         mysql_database_t *db;
 781         MYSQL      *con;
 782         MYSQL_RES  *res;
 783         MYSQL_ROW   row;
 784         const char *query;
 785
 786         derive_t qcache_hits          = 0;
 787         derive_t qcache_inserts       = 0;
 788         derive_t qcache_not_cached    = 0;
 789         derive_t qcache_lowmem_prunes = 0;
 790         gauge_t qcache_queries_in_cache = NAN;
 791
 792         gauge_t threads_running   = NAN;
 793         gauge_t threads_connected = NAN;
 794         gauge_t threads_cached    = NAN;
 795         derive_t threads_created = 0;
 796
 797         unsigned long long traffic_incoming = 0ULL;
 798         unsigned long long traffic_outgoing = 0ULL;
 799         unsigned long mysql_version = 0ULL;
 800
 801         if ((ud == NULL) || (ud->data == NULL))
 802         {
 803                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 804                 return (-1);
 805         }
 806
 807         db = (mysql_database_t *) ud->data;
 808
 809         /* An error message will have been printed in this case */
 810         if ((con = getconnection (db)) == NULL)
 811                 return (-1);
 812
 813         mysql_version = mysql_get_server_version(con);
 814
 815         query = "SHOW STATUS";
 816         if (mysql_version >= 50002)
 817                 query = "SHOW GLOBAL STATUS";
 818
 819         res = exec_query (con, query);
 820         if (res == NULL)
 821                 return (-1);
 822
 823         while ((row = mysql_fetch_row (res)))
 824         {
 825                 char *key;
 826                 unsigned long long val;
 827
 828                 key = row[0];
 829                 val = atoll (row[1]);
 830
 831                 if (strncmp (key, "Com_",
 832                                   strlen ("Com_")) == 0)
 833                 {
 834                         if (val == 0ULL)
 835                                 continue;
 836
 837                         /* Ignore `prepared statements' */
 838                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 839                                 counter_submit ("mysql_commands",
 840                                                 key + strlen ("Com_"),
 841                                                 val, db);
 842                 }
 843                 else if (strncmp (key, "Handler_",
 844                                         strlen ("Handler_")) == 0)
 845                 {
 846                         if (val == 0ULL)
 847                                 continue;
 848
 849                         counter_submit ("mysql_handler",
 850                                         key + strlen ("Handler_"),
 851                                         val, db);
 852                 }
 853                 else if (strncmp (key, "Qcache_",
 854                                         strlen ("Qcache_")) == 0)
 855                 {
 856                         if (strcmp (key, "Qcache_hits") == 0)
 857                                 qcache_hits = (derive_t) val;
 858                         else if (strcmp (key, "Qcache_inserts") == 0)
 859                                 qcache_inserts = (derive_t) val;
 860                         else if (strcmp (key, "Qcache_not_cached") == 0)
 861                                 qcache_not_cached = (derive_t) val;
 862                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 863                                 qcache_lowmem_prunes = (derive_t) val;
 864                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 865                                 qcache_queries_in_cache = (gauge_t) val;
 866                 }
 867                 else if (strncmp (key, "Bytes_",
 868                                         strlen ("Bytes_")) == 0)
 869                 {
 870                         if (strcmp (key, "Bytes_received") == 0)
 871                                 traffic_incoming += val;
 872                         else if (strcmp (key, "Bytes_sent") == 0)
 873                                 traffic_outgoing += val;
 874                 }
 875                 else if (strncmp (key, "Threads_",
 876                                         strlen ("Threads_")) == 0)
 877                 {
 878                         if (strcmp (key, "Threads_running") == 0)
 879                                 threads_running = (gauge_t) val;
 880                         else if (strcmp (key, "Threads_connected") == 0)
 881                                 threads_connected = (gauge_t) val;
 882                         else if (strcmp (key, "Threads_cached") == 0)
 883                                 threads_cached = (gauge_t) val;
 884                         else if (strcmp (key, "Threads_created") == 0)
 885                                 threads_created = (derive_t) val;
 886                 }
 887                 else if (strncmp (key, "Table_locks_",
 888                                         strlen ("Table_locks_")) == 0)
 889                 {
 890                         counter_submit ("mysql_locks",
 891                                         key + strlen ("Table_locks_"),
 892                                         val, db);
 893                 }
 894                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 895                 {
 896                         /* buffer pool */
 897                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 898                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 899                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 900                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 901                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 902                                 counter_submit ("mysql_bpool_counters", "pages_flushed", val, db);
 903                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 904                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 905                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 906                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 907                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 908                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 909                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 910                                 counter_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 911                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 912                                 counter_submit ("mysql_bpool_counters", "read_ahead", val, db);
 913                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 914                                 counter_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 915                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 916                                 counter_submit ("mysql_bpool_counters", "read_requests", val, db);
 917                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 918                                 counter_submit ("mysql_bpool_counters", "reads", val, db);
 919                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 920                                 counter_submit ("mysql_bpool_counters", "write_requests", val, db);
 921                         else if (strcmp (key, "Innodb_buffer_pool_bytes_data") == 0)
 922                                 gauge_submit ("mysql_bpool_bytes", "data", val, db);
 923                         else if (strcmp (key, "Innodb_buffer_pool_bytes_dirty") == 0)
 924                                 gauge_submit ("mysql_bpool_bytes", "dirty", val, db);
 925
 926                         /* data */
 927                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 928                                 counter_submit ("mysql_innodb_data", "fsyncs", val, db);
 929                         else if (strcmp (key, "Innodb_data_read") == 0)
 930                                 counter_submit ("mysql_innodb_data", "read", val, db);
 931                         else if (strcmp (key, "Innodb_data_reads") == 0)
 932                                 counter_submit ("mysql_innodb_data", "reads", val, db);
 933                         else if (strcmp (key, "Innodb_data_writes") == 0)
 934                                 counter_submit ("mysql_innodb_data", "writes", val, db);
 935                         else if (strcmp (key, "Innodb_data_written") == 0)
 936                                 counter_submit ("mysql_innodb_data", "written", val, db);
 937
 938                         /* double write */
 939                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 940                                 counter_submit ("mysql_innodb_dblwr", "writes", val, db);
 941                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 942                                 counter_submit ("mysql_innodb_dblwr", "written", val, db);
 943
 944                         /* log */
 945                         else if (strcmp (key, "Innodb_log_waits") == 0)
 946                                 counter_submit ("mysql_innodb_log", "waits", val, db);
 947                         else if (strcmp (key, "Innodb_log_write_requests") == 0)
 948                                 counter_submit ("mysql_innodb_log", "write_requests", val, db);
 949                         else if (strcmp (key, "Innodb_log_writes") == 0)
 950                                 counter_submit ("mysql_innodb_log", "writes", val, db);
 951                         else if (strcmp (key, "Innodb_os_log_fsyncs") == 0)
 952                                 counter_submit ("mysql_innodb_log", "fsyncs", val, db);
 953                         else if (strcmp (key, "Innodb_os_log_written") == 0)
 954                                 counter_submit ("mysql_innodb_log", "written", val, db);
 955
 956                         /* pages */
 957                         else if (strcmp (key, "Innodb_pages_created") == 0)
 958                                 counter_submit ("mysql_innodb_pages", "created", val, db);
 959                         else if (strcmp (key, "Innodb_pages_read") == 0)
 960                                 counter_submit ("mysql_innodb_pages", "read", val, db);
 961                         else if (strcmp (key, "Innodb_pages_written") == 0)
 962                                 counter_submit ("mysql_innodb_pages", "written", val, db);
 963
 964                         /* row lock */
 965                         else if (strcmp (key, "Innodb_row_lock_time") == 0)
 966                                 counter_submit ("mysql_innodb_row_lock", "time", val, db);
 967                         else if (strcmp (key, "Innodb_row_lock_waits") == 0)
 968                                 counter_submit ("mysql_innodb_row_lock", "waits", val, db);
 969
 970                         /* rows */
 971                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 972                                 counter_submit ("mysql_innodb_rows", "deleted", val, db);
 973                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 974                                 counter_submit ("mysql_innodb_rows", "inserted", val, db);
 975                         else if (strcmp (key, "Innodb_rows_read") == 0)
 976                                 counter_submit ("mysql_innodb_rows", "read", val, db);
 977                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 978                                 counter_submit ("mysql_innodb_rows", "updated", val, db);
 979                 }
 980                 else if (strncmp (key, "Select_", strlen ("Select_")) == 0)
 981                 {
 982                         counter_submit ("mysql_select", key + strlen ("Select_"),
 983                                         val, db);
 984                 }
 985                 else if (strncmp (key, "Sort_", strlen ("Sort_")) == 0)
 986                 {
 987                         if (strcmp (key, "Sort_merge_passes") == 0)
 988                                 counter_submit ("mysql_sort_merge_passes", NULL, val, db);
 989                         else if (strcmp (key, "Sort_rows") == 0)
 990                                 counter_submit ("mysql_sort_rows", NULL, val, db);
 991                         else if (strcmp (key, "Sort_range") == 0)
 992                                 counter_submit ("mysql_sort", "range", val, db);
 993                         else if (strcmp (key, "Sort_scan") == 0)
 994                                 counter_submit ("mysql_sort", "scan", val, db);
 995
 996                 }
 997                 else if (strncmp (key, "Slow_queries", strlen ("Slow_queries")) == 0)
 998                 {
 999                         counter_submit ("mysql_slow_queries", NULL , val, db);
1000                 }
1001         }
1002         mysql_free_result (res); res = NULL;
1003
1004         if ((qcache_hits != 0)
1005                         || (qcache_inserts != 0)
1006                         || (qcache_not_cached != 0)
1007                         || (qcache_lowmem_prunes != 0))
1008         {
1009                 derive_submit ("cache_result", "qcache-hits",
1010                                 qcache_hits, db);
1011                 derive_submit ("cache_result", "qcache-inserts",
1012                                 qcache_inserts, db);
1013                 derive_submit ("cache_result", "qcache-not_cached",
1014                                 qcache_not_cached, db);
1015                 derive_submit ("cache_result", "qcache-prunes",
1016                                 qcache_lowmem_prunes, db);
1017
1018                 gauge_submit ("cache_size", "qcache",
1019                                 qcache_queries_in_cache, db);
1020         }
1021
1022         if (threads_created != 0)
1023         {
1024                 gauge_submit ("threads", "running",
1025                                 threads_running, db);
1026                 gauge_submit ("threads", "connected",
1027                                 threads_connected, db);
1028                 gauge_submit ("threads", "cached",
1029                                 threads_cached, db);
1030
1031                 derive_submit ("total_threads", "created",
1032                                 threads_created, db);
1033         }
1034
1035         traffic_submit  (traffic_incoming, traffic_outgoing, db);
1036
1037         if (mysql_version >= 50600 && db->innodb_stats)
1038                 mysql_read_innodb_stats (db, con);
1039
1040         if (db->master_stats)
1041                 mysql_read_master_stats (db, con);
1042
1043         if ((db->slave_stats) || (db->slave_notif))
1044                 mysql_read_slave_stats (db, con);
1045
1046         if (db->wsrep_stats)
1047                 mysql_read_wsrep_stats (db, con);
1048
1049         return (0);
1050 } /* int mysql_read */
1051
1052 void module_register (void)
1053 {
1054         plugin_register_complex_config ("mysql", mysql_config);
1055 } /* void module_register */