src/mysql.c

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