src/mysql.c

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