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