src/mysql.c

   1 /**
   2  * collectd - src/mysql.c
   3  * Copyright (C) 2006-2010  Florian octo Forster
   4  * Copyright (C) 2008       Mirko Buffoni
   5  * Copyright (C) 2009       Doug MacEachern
   6  * Copyright (C) 2009       Sebastian tokkee Harl
   7  * Copyright (C) 2009       Rodolphe Quiédeville
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; only version 2 of the License is applicable.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21  *
  22  * Authors:
  23  *   Florian octo Forster <octo at collectd.org>
  24  *   Mirko Buffoni <briareos at eswat.org>
  25  *   Doug MacEachern <dougm at hyperic.com>
  26  *   Sebastian tokkee Harl <sh at tokkee.org>
  27  *   Rodolphe Quiédeville <rquiedeville at bearstech.com>
  28  **/
  29
  30 #include "collectd.h"
  31
  32 #include "common.h"
  33 #include "plugin.h"
  34
  35 #ifdef HAVE_MYSQL_H
  36 #include <mysql.h>
  37 #elif defined(HAVE_MYSQL_MYSQL_H)
  38 #include <mysql/mysql.h>
  39 #endif
  40
  41 struct mysql_database_s /* {{{ */
  42 {
  43         char *instance;
  44         char *alias;
  45         char *host;
  46         char *user;
  47         char *pass;
  48         char *database;
  49
  50         /* mysql_ssl_set params */
  51         char *key;
  52         char *cert;
  53         char *ca;
  54         char *capath;
  55         char *cipher;
  56
  57         char *socket;
  58         int   port;
  59         int   timeout;
  60
  61         _Bool master_stats;
  62         _Bool slave_stats;
  63         _Bool innodb_stats;
  64         _Bool wsrep_stats;
  65
  66         _Bool slave_notif;
  67         _Bool slave_io_running;
  68         _Bool slave_sql_running;
  69
  70         MYSQL *con;
  71         _Bool  is_connected;
  72 };
  73 typedef struct mysql_database_s mysql_database_t; /* }}} */
  74
  75 static int mysql_read (user_data_t *ud);
  76
  77 static void mysql_database_free (void *arg) /* {{{ */
  78 {
  79         mysql_database_t *db;
  80
  81         DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
  82
  83         db = arg;
  84
  85         if (db == NULL)
  86                 return;
  87
  88         if (db->con != NULL)
  89                 mysql_close (db->con);
  90
  91         sfree (db->alias);
  92         sfree (db->host);
  93         sfree (db->user);
  94         sfree (db->pass);
  95         sfree (db->socket);
  96         sfree (db->instance);
  97         sfree (db->database);
  98         sfree (db->key);
  99         sfree (db->cert);
 100         sfree (db->ca);
 101         sfree (db->capath);
 102         sfree (db->cipher);
 103         sfree (db);
 104 } /* }}} void mysql_database_free */
 105
 106 /* Configuration handling functions {{{
 107  *
 108  * <Plugin mysql>
 109  *   <Database "plugin_instance1">
 110  *     Host "localhost"
 111  *     Port 22000
 112  *     ...
 113  *   </Database>
 114  * </Plugin>
 115  */
 116 static int mysql_config_database (oconfig_item_t *ci) /* {{{ */
 117 {
 118         mysql_database_t *db;
 119         int status = 0;
 120
 121         if ((ci->values_num != 1)
 122             || (ci->values[0].type != OCONFIG_TYPE_STRING))
 123         {
 124                 WARNING ("mysql plugin: The `Database' block "
 125                          "needs exactly one string argument.");
 126                 return (-1);
 127         }
 128
 129         db = calloc (1, sizeof (*db));
 130         if (db == NULL)
 131         {
 132                 ERROR ("mysql plugin: calloc failed.");
 133                 return (-1);
 134         }
 135
 136         /* initialize all the pointers */
 137         db->alias    = NULL;
 138         db->host     = NULL;
 139         db->user     = NULL;
 140         db->pass     = NULL;
 141         db->database = NULL;
 142         db->key      = NULL;
 143         db->cert     = NULL;
 144         db->ca       = NULL;
 145         db->capath   = NULL;
 146         db->cipher   = NULL;
 147
 148         db->socket   = NULL;
 149         db->con      = NULL;
 150         db->timeout  = 0;
 151
 152         /* trigger a notification, if it's not running */
 153         db->slave_io_running  = 1;
 154         db->slave_sql_running = 1;
 155
 156         status = cf_util_get_string (ci, &db->instance);
 157         if (status != 0)
 158         {
 159                 sfree (db);
 160                 return (status);
 161         }
 162         assert (db->instance != NULL);
 163
 164         /* Fill the `mysql_database_t' structure.. */
 165         for (int i = 0; i < ci->children_num; i++)
 166         {
 167                 oconfig_item_t *child = ci->children + i;
 168
 169                 if (strcasecmp ("Alias", child->key) == 0)
 170                         status = cf_util_get_string (child, &db->alias);
 171                 else if (strcasecmp ("Host", child->key) == 0)
 172                         status = cf_util_get_string (child, &db->host);
 173                 else if (strcasecmp ("User", child->key) == 0)
 174                         status = cf_util_get_string (child, &db->user);
 175                 else if (strcasecmp ("Password", child->key) == 0)
 176                         status = cf_util_get_string (child, &db->pass);
 177                 else if (strcasecmp ("Port", child->key) == 0)
 178                 {
 179                         status = cf_util_get_port_number (child);
 180                         if (status > 0)
 181                         {
 182                                 db->port = status;
 183                                 status = 0;
 184                         }
 185                 }
 186                 else if (strcasecmp ("Socket", child->key) == 0)
 187                         status = cf_util_get_string (child, &db->socket);
 188                 else if (strcasecmp ("Database", child->key) == 0)
 189                         status = cf_util_get_string (child, &db->database);
 190                 else if (strcasecmp ("SSLKey", child->key) == 0)
 191                         status = cf_util_get_string (child, &db->key);
 192                 else if (strcasecmp ("SSLCert", child->key) == 0)
 193                         status = cf_util_get_string (child, &db->cert);
 194                 else if (strcasecmp ("SSLCA", child->key) == 0)
 195                         status = cf_util_get_string (child, &db->ca);
 196                 else if (strcasecmp ("SSLCAPath", child->key) == 0)
 197                         status = cf_util_get_string (child, &db->capath);
 198                 else if (strcasecmp ("SSLCipher", child->key) == 0)
 199                         status = cf_util_get_string (child, &db->cipher);
 200                 else if (strcasecmp ("ConnectTimeout", child->key) == 0)
 201                         status = cf_util_get_int (child, &db->timeout);
 202                 else if (strcasecmp ("MasterStats", child->key) == 0)
 203                         status = cf_util_get_boolean (child, &db->master_stats);
 204                 else if (strcasecmp ("SlaveStats", child->key) == 0)
 205                         status = cf_util_get_boolean (child, &db->slave_stats);
 206                 else if (strcasecmp ("SlaveNotifications", child->key) == 0)
 207                         status = cf_util_get_boolean (child, &db->slave_notif);
 208                 else if (strcasecmp ("InnodbStats", child->key) == 0)
 209                         status = cf_util_get_boolean (child, &db->innodb_stats);
 210                 else if (strcasecmp ("WsrepStats", child->key) == 0)
 211                         status = cf_util_get_boolean (child, &db->wsrep_stats);
 212                 else
 213                 {
 214                         WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
 215                         status = -1;
 216                 }
 217
 218                 if (status != 0)
 219                         break;
 220         }
 221
 222         /* If all went well, register this database for reading */
 223         if (status == 0)
 224         {
 225                 char cb_name[DATA_MAX_NAME_LEN];
 226
 227                 DEBUG ("mysql plugin: Registering new read callback: %s",
 228                                 (db->database != NULL) ? db->database : "<default>");
 229
 230                 if (db->instance != NULL)
 231                         ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
 232                                         db->instance);
 233                 else
 234                         sstrncpy (cb_name, "mysql", sizeof (cb_name));
 235
 236                 user_data_t ud = {
 237                         .data = db,
 238                         .free_func = mysql_database_free
 239                 };
 240
 241                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 242                                               mysql_read,
 243                                               /* interval = */ 0, &ud);
 244         }
 245         else
 246         {
 247                 mysql_database_free (db);
 248                 return (-1);
 249         }
 250
 251         return (0);
 252 } /* }}} int mysql_config_database */
 253
 254 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 255 {
 256         if (ci == NULL)
 257                 return (EINVAL);
 258
 259         /* Fill the `mysql_database_t' structure.. */
 260         for (int i = 0; i < ci->children_num; i++)
 261         {
 262                 oconfig_item_t *child = ci->children + i;
 263
 264                 if (strcasecmp ("Database", child->key) == 0)
 265                         mysql_config_database (child);
 266                 else
 267                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 268                                         child->key);
 269         }
 270
 271         return (0);
 272 } /* }}} int mysql_config */
 273
 274 /* }}} End of configuration handling functions */
 275
 276 static MYSQL *getconnection (mysql_database_t *db)
 277 {
 278         const char *cipher;
 279
 280         if (db->is_connected)
 281         {
 282                 int status;
 283
 284                 status = mysql_ping (db->con);
 285                 if (status == 0)
 286                         return (db->con);
 287
 288                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 289                                 db->instance, mysql_error (db->con));
 290         }
 291         db->is_connected = 0;
 292
 293         if (db->con == NULL)
 294         {
 295                 db->con = mysql_init (NULL);
 296                 if (db->con == NULL)
 297                 {
 298                         ERROR ("mysql plugin: mysql_init failed: %s",
 299                                         mysql_error (db->con));
 300                         return (NULL);
 301                 }
 302         }
 303
 304         /* Configure TCP connect timeout (default: 0) */
 305         db->con->options.connect_timeout = db->timeout;
 306
 307         mysql_ssl_set (db->con, db->key, db->cert, db->ca, db->capath, db->cipher);
 308
 309         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 310                                 db->database, db->port, db->socket, 0) == NULL)
 311         {
 312                 ERROR ("mysql plugin: Failed to connect to database %s "
 313                                 "at server %s: %s",
 314                                 (db->database != NULL) ? db->database : "<none>",
 315                                 (db->host != NULL) ? db->host : "localhost",
 316                                 mysql_error (db->con));
 317                 return (NULL);
 318         }
 319
 320         cipher = mysql_get_ssl_cipher (db->con);
 321
 322         INFO ("mysql plugin: Successfully connected to database %s "
 323                         "at server %s with cipher %s "
 324                         "(server version: %s, protocol version: %d) ",
 325                         (db->database != NULL) ? db->database : "<none>",
 326                         mysql_get_host_info (db->con),
 327                         (cipher != NULL) ?  cipher : "<none>",
 328                         mysql_get_server_info (db->con),
 329                         mysql_get_proto_info (db->con));
 330
 331         db->is_connected = 1;
 332         return (db->con);
 333 } /* static MYSQL *getconnection (mysql_database_t *db) */
 334
 335 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 336 {
 337         if (db->alias)
 338                 sstrncpy (buf, db->alias, buflen);
 339         else if ((db->host == NULL)
 340                         || (strcmp ("", db->host) == 0)
 341                         || (strcmp ("127.0.0.1", db->host) == 0)
 342                         || (strcmp ("localhost", db->host) == 0))
 343                 sstrncpy (buf, hostname_g, buflen);
 344         else
 345                 sstrncpy (buf, db->host, buflen);
 346 } /* void set_host */
 347
 348 static void submit (const char *type, const char *type_instance,
 349                 value_t *values, size_t values_len, mysql_database_t *db)
 350 {
 351         value_list_t vl = VALUE_LIST_INIT;
 352
 353         vl.values     = values;
 354         vl.values_len = values_len;
 355
 356         set_host (db, vl.host, sizeof (vl.host));
 357
 358         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 359
 360         /* Assured by "mysql_config_database" */
 361         assert (db->instance != NULL);
 362         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 363
 364         sstrncpy (vl.type, type, sizeof (vl.type));
 365         if (type_instance != NULL)
 366                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 367
 368         plugin_dispatch_values (&vl);
 369 } /* submit */
 370
 371 static void counter_submit (const char *type, const char *type_instance,
 372                 derive_t value, mysql_database_t *db)
 373 {
 374         value_t values[1];
 375
 376         values[0].derive = value;
 377         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 378 } /* void counter_submit */
 379
 380 static void gauge_submit (const char *type, const char *type_instance,
 381                 gauge_t value, mysql_database_t *db)
 382 {
 383         value_t values[1];
 384
 385         values[0].gauge = value;
 386         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 387 } /* void gauge_submit */
 388
 389 static void derive_submit (const char *type, const char *type_instance,
 390                 derive_t value, mysql_database_t *db)
 391 {
 392         value_t values[1];
 393
 394         values[0].derive = value;
 395         submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
 396 } /* void derive_submit */
 397
 398 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 399 {
 400         value_t values[2];
 401
 402         values[0].derive = rx;
 403         values[1].derive = tx;
 404
 405         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 406 } /* void traffic_submit */
 407
 408 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 409 {
 410         MYSQL_RES *res;
 411
 412         int query_len = strlen (query);
 413
 414         if (mysql_real_query (con, query, query_len))
 415         {
 416                 ERROR ("mysql plugin: Failed to execute query: %s",
 417                                 mysql_error (con));
 418                 INFO ("mysql plugin: SQL query was: %s", query);
 419                 return (NULL);
 420         }
 421
 422         res = mysql_store_result (con);
 423         if (res == NULL)
 424         {
 425                 ERROR ("mysql plugin: Failed to store query result: %s",
 426                                 mysql_error (con));
 427                 INFO ("mysql plugin: SQL query was: %s", query);
 428                 return (NULL);
 429         }
 430
 431         return (res);
 432 } /* exec_query */
 433
 434 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 435 {
 436         MYSQL_RES *res;
 437         MYSQL_ROW  row;
 438
 439         const char *query;
 440         int         field_num;
 441         unsigned long long position;
 442
 443         query = "SHOW MASTER STATUS";
 444
 445         res = exec_query (con, query);
 446         if (res == NULL)
 447                 return (-1);
 448
 449         row = mysql_fetch_row (res);
 450         if (row == NULL)
 451         {
 452                 ERROR ("mysql plugin: Failed to get master statistics: "
 453                                 "`%s' did not return any rows.", query);
 454                 mysql_free_result (res);
 455                 return (-1);
 456         }
 457
 458         field_num = mysql_num_fields (res);
 459         if (field_num < 2)
 460         {
 461                 ERROR ("mysql plugin: Failed to get master statistics: "
 462                                 "`%s' returned less than two columns.", query);
 463                 mysql_free_result (res);
 464                 return (-1);
 465         }
 466
 467         position = atoll (row[1]);
 468         counter_submit ("mysql_log_position", "master-bin", position, db);
 469
 470         row = mysql_fetch_row (res);
 471         if (row != NULL)
 472                 WARNING ("mysql plugin: `%s' returned more than one row - "
 473                                 "ignoring further results.", query);
 474
 475         mysql_free_result (res);
 476
 477         return (0);
 478 } /* mysql_read_master_stats */
 479
 480 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 481 {
 482         MYSQL_RES *res;
 483         MYSQL_ROW  row;
 484
 485         const char *query;
 486         int         field_num;
 487
 488         /* WTF? libmysqlclient does not seem to provide any means to
 489          * translate a column name to a column index ... :-/ */
 490         const int READ_MASTER_LOG_POS_IDX   = 6;
 491         const int SLAVE_IO_RUNNING_IDX      = 10;
 492         const int SLAVE_SQL_RUNNING_IDX     = 11;
 493         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 494         const int SECONDS_BEHIND_MASTER_IDX = 32;
 495
 496         query = "SHOW SLAVE STATUS";
 497
 498         res = exec_query (con, query);
 499         if (res == NULL)
 500                 return (-1);
 501
 502         row = mysql_fetch_row (res);
 503         if (row == NULL)
 504         {
 505                 ERROR ("mysql plugin: Failed to get slave statistics: "
 506                                 "`%s' did not return any rows.", query);
 507                 mysql_free_result (res);
 508                 return (-1);
 509         }
 510
 511         field_num = mysql_num_fields (res);
 512         if (field_num < 33)
 513         {
 514                 ERROR ("mysql plugin: Failed to get slave statistics: "
 515                                 "`%s' returned less than 33 columns.", query);
 516                 mysql_free_result (res);
 517                 return (-1);
 518         }
 519
 520         if (db->slave_stats)
 521         {
 522                 unsigned long long counter;
 523                 double gauge;
 524
 525                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 526                 counter_submit ("mysql_log_position", "slave-read", counter, db);
 527
 528                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 529                 counter_submit ("mysql_log_position", "slave-exec", counter, db);
 530
 531                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 532                 {
 533                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 534                         gauge_submit ("time_offset", NULL, gauge, db);
 535                 }
 536         }
 537
 538         if (db->slave_notif)
 539         {
 540                 notification_t n = { 0, cdtime (), "", "",
 541                         "mysql", "", "time_offset", "", NULL };
 542
 543                 char *io, *sql;
 544
 545                 io  = row[SLAVE_IO_RUNNING_IDX];
 546                 sql = row[SLAVE_SQL_RUNNING_IDX];
 547
 548                 set_host (db, n.host, sizeof (n.host));
 549
 550                 /* Assured by "mysql_config_database" */
 551                 assert (db->instance != NULL);
 552                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 553
 554                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 555                                 && (db->slave_io_running))
 556                 {
 557                         n.severity = NOTIF_WARNING;
 558                         ssnprintf (n.message, sizeof (n.message),
 559                                         "slave I/O thread not started or not connected to master");
 560                         plugin_dispatch_notification (&n);
 561                         db->slave_io_running = 0;
 562                 }
 563                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 564                                 && (! db->slave_io_running))
 565                 {
 566                         n.severity = NOTIF_OKAY;
 567                         ssnprintf (n.message, sizeof (n.message),
 568                                         "slave I/O thread started and connected to master");
 569                         plugin_dispatch_notification (&n);
 570                         db->slave_io_running = 1;
 571                 }
 572
 573                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 574                                 && (db->slave_sql_running))
 575                 {
 576                         n.severity = NOTIF_WARNING;
 577                         ssnprintf (n.message, sizeof (n.message),
 578                                         "slave SQL thread not started");
 579                         plugin_dispatch_notification (&n);
 580                         db->slave_sql_running = 0;
 581                 }
 582                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 583                                 && (! db->slave_sql_running))
 584                 {
 585                         n.severity = NOTIF_OKAY;
 586                         ssnprintf (n.message, sizeof (n.message),
 587                                         "slave SQL thread started");
 588                         plugin_dispatch_notification (&n);
 589                         db->slave_sql_running = 1;
 590                 }
 591         }
 592
 593         row = mysql_fetch_row (res);
 594         if (row != NULL)
 595                 WARNING ("mysql plugin: `%s' returned more than one row - "
 596                                 "ignoring further results.", query);
 597
 598         mysql_free_result (res);
 599
 600         return (0);
 601 } /* mysql_read_slave_stats */
 602
 603 static int mysql_read_innodb_stats (mysql_database_t *db, MYSQL *con)
 604 {
 605         MYSQL_RES *res;
 606         MYSQL_ROW  row;
 607
 608         const char *query;
 609         struct {
 610                 const char *key;
 611                 const char *type;
 612                 int ds_type;
 613         } metrics[] = {
 614                 { "metadata_mem_pool_size",          "bytes",        DS_TYPE_GAUGE },
 615                 { "lock_deadlocks",                  "mysql_locks",  DS_TYPE_DERIVE },
 616                 { "lock_timeouts",                   "mysql_locks",  DS_TYPE_DERIVE },
 617                 { "lock_row_lock_current_waits",     "mysql_locks",  DS_TYPE_DERIVE },
 618                 { "buffer_pool_size",                "bytes",        DS_TYPE_GAUGE },
 619
 620                 { "os_log_bytes_written",            "operations",   DS_TYPE_DERIVE },
 621                 { "os_log_pending_fsyncs",           "operations",   DS_TYPE_DERIVE },
 622                 { "os_log_pending_writes",           "operations",   DS_TYPE_DERIVE },
 623
 624                 { "trx_rseg_history_len",            "gauge",        DS_TYPE_GAUGE },
 625
 626                 { "adaptive_hash_searches",          "operations",   DS_TYPE_DERIVE },
 627
 628                 { "file_num_open_files",             "gauge",        DS_TYPE_GAUGE },
 629
 630                 { "ibuf_merges_insert",              "operations",   DS_TYPE_DERIVE },
 631                 { "ibuf_merges_delete_mark",         "operations",   DS_TYPE_DERIVE },
 632                 { "ibuf_merges_delete",              "operations",   DS_TYPE_DERIVE },
 633                 { "ibuf_merges_discard_insert",      "operations",   DS_TYPE_DERIVE },
 634                 { "ibuf_merges_discard_delete_mark", "operations",   DS_TYPE_DERIVE },
 635                 { "ibuf_merges_discard_delete",      "operations",   DS_TYPE_DERIVE },
 636                 { "ibuf_merges_discard_merges",      "operations",   DS_TYPE_DERIVE },
 637                 { "ibuf_size",                       "bytes",        DS_TYPE_GAUGE },
 638
 639                 { "innodb_activity_count",           "gauge",        DS_TYPE_GAUGE },
 640
 641                 { "innodb_rwlock_s_spin_waits",      "operations",   DS_TYPE_DERIVE },
 642                 { "innodb_rwlock_x_spin_waits",      "operations",   DS_TYPE_DERIVE },
 643                 { "innodb_rwlock_s_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 644                 { "innodb_rwlock_x_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 645                 { "innodb_rwlock_s_os_waits",        "operations",   DS_TYPE_DERIVE },
 646                 { "innodb_rwlock_x_os_waits",        "operations",   DS_TYPE_DERIVE },
 647
 648                 { "dml_reads",                       "operations",   DS_TYPE_DERIVE },
 649                 { "dml_inserts",                     "operations",   DS_TYPE_DERIVE },
 650                 { "dml_deletes",                     "operations",   DS_TYPE_DERIVE },
 651                 { "dml_updates",                     "operations",   DS_TYPE_DERIVE },
 652
 653                 { NULL,                              NULL,           0}
 654         };
 655
 656         query = "SELECT name, count, type FROM information_schema.innodb_metrics WHERE status = 'enabled'";
 657
 658         res = exec_query (con, query);
 659         if (res == NULL)
 660                 return (-1);
 661
 662         while ((row = mysql_fetch_row (res)))
 663         {
 664                 int i;
 665                 char *key;
 666                 unsigned long long val;
 667
 668                 key = row[0];
 669                 val = atoll (row[1]);
 670
 671                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 672                         ;
 673
 674                 if (metrics[i].key == NULL)
 675                         continue;
 676
 677                 switch (metrics[i].ds_type) {
 678                         case DS_TYPE_COUNTER:
 679                                 counter_submit(metrics[i].type, key, (counter_t)val, db);
 680                                 break;
 681                         case DS_TYPE_GAUGE:
 682                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 683                                 break;
 684                         case DS_TYPE_DERIVE:
 685                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 686                                 break;
 687                 }
 688         }
 689
 690         mysql_free_result(res);
 691         return (0);
 692 }
 693
 694 static int mysql_read_wsrep_stats (mysql_database_t *db, MYSQL *con)
 695 {
 696         MYSQL_RES *res;
 697         MYSQL_ROW  row;
 698
 699         const char *query;
 700         struct {
 701                 const char *key;
 702                 const char *type;
 703                 int ds_type;
 704         } metrics[] = {
 705
 706                 { "wsrep_apply_oooe",                "operations",   DS_TYPE_DERIVE },
 707                 { "wsrep_apply_oool",                "operations",   DS_TYPE_DERIVE },
 708                 { "wsrep_causal_reads",              "operations",   DS_TYPE_DERIVE },
 709                 { "wsrep_commit_oooe",               "operations",   DS_TYPE_DERIVE },
 710                 { "wsrep_commit_oool",               "operations",   DS_TYPE_DERIVE },
 711                 { "wsrep_flow_control_recv",         "operations",   DS_TYPE_DERIVE },
 712                 { "wsrep_flow_control_sent",         "operations",   DS_TYPE_DERIVE },
 713                 { "wsrep_flow_control_paused",       "operations",   DS_TYPE_DERIVE },
 714                 { "wsrep_local_bf_aborts",           "operations",   DS_TYPE_DERIVE },
 715                 { "wsrep_local_cert_failures",       "operations",   DS_TYPE_DERIVE },
 716                 { "wsrep_local_commits",             "operations",   DS_TYPE_DERIVE },
 717                 { "wsrep_local_replays",             "operations",   DS_TYPE_DERIVE },
 718                 { "wsrep_received",                  "operations",   DS_TYPE_DERIVE },
 719                 { "wsrep_replicated",                "operations",   DS_TYPE_DERIVE },
 720
 721                 { "wsrep_received_bytes",            "total_bytes",  DS_TYPE_DERIVE },
 722                 { "wsrep_replicated_bytes",          "total_bytes",  DS_TYPE_DERIVE },
 723
 724                 { "wsrep_apply_window",              "gauge",        DS_TYPE_GAUGE },
 725                 { "wsrep_commit_window",             "gauge",        DS_TYPE_GAUGE },
 726
 727                 { "wsrep_cluster_size",              "gauge",        DS_TYPE_GAUGE },
 728                 { "wsrep_cert_deps_distance",        "gauge",        DS_TYPE_GAUGE },
 729
 730                 { "wsrep_local_recv_queue",          "queue_length", DS_TYPE_GAUGE },
 731                 { "wsrep_local_send_queue",          "queue_length", DS_TYPE_GAUGE },
 732
 733                 { NULL,                              NULL,           0}
 734
 735         };
 736
 737         query = "SHOW GLOBAL STATUS LIKE 'wsrep_%'";
 738
 739         res = exec_query (con, query);
 740         if (res == NULL)
 741                 return (-1);
 742
 743         row = mysql_fetch_row (res);
 744         if (row == NULL)
 745         {
 746                 ERROR ("mysql plugin: Failed to get wsrep statistics: "
 747                         "`%s' did not return any rows.", query);
 748                 mysql_free_result (res);
 749                 return (-1);
 750         }
 751
 752         while ((row = mysql_fetch_row (res)))
 753         {
 754                 int i;
 755                 char *key;
 756                 unsigned long long val;
 757
 758                 key = row[0];
 759                 val = atoll (row[1]);
 760
 761                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 762                         ;
 763
 764                 if (metrics[i].key == NULL)
 765                         continue;
 766
 767                 switch (metrics[i].ds_type) {
 768                         case DS_TYPE_GAUGE:
 769                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 770                                 break;
 771                         case DS_TYPE_DERIVE:
 772                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 773                                 break;
 774                 }
 775         }
 776
 777         mysql_free_result(res);
 778         return (0);
 779 } /* mysql_read_wsrep_stats */
 780
 781 static int mysql_read (user_data_t *ud)
 782 {
 783         mysql_database_t *db;
 784         MYSQL      *con;
 785         MYSQL_RES  *res;
 786         MYSQL_ROW   row;
 787         const char *query;
 788
 789         derive_t qcache_hits          = 0;
 790         derive_t qcache_inserts       = 0;
 791         derive_t qcache_not_cached    = 0;
 792         derive_t qcache_lowmem_prunes = 0;
 793         gauge_t qcache_queries_in_cache = NAN;
 794
 795         gauge_t threads_running   = NAN;
 796         gauge_t threads_connected = NAN;
 797         gauge_t threads_cached    = NAN;
 798         derive_t threads_created = 0;
 799
 800         unsigned long long traffic_incoming = 0ULL;
 801         unsigned long long traffic_outgoing = 0ULL;
 802         unsigned long mysql_version = 0ULL;
 803
 804         if ((ud == NULL) || (ud->data == NULL))
 805         {
 806                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 807                 return (-1);
 808         }
 809
 810         db = (mysql_database_t *) ud->data;
 811
 812         /* An error message will have been printed in this case */
 813         if ((con = getconnection (db)) == NULL)
 814                 return (-1);
 815
 816         mysql_version = mysql_get_server_version(con);
 817
 818         query = "SHOW STATUS";
 819         if (mysql_version >= 50002)
 820                 query = "SHOW GLOBAL STATUS";
 821
 822         res = exec_query (con, query);
 823         if (res == NULL)
 824                 return (-1);
 825
 826         while ((row = mysql_fetch_row (res)))
 827         {
 828                 char *key;
 829                 unsigned long long val;
 830
 831                 key = row[0];
 832                 val = atoll (row[1]);
 833
 834                 if (strncmp (key, "Com_",
 835                                   strlen ("Com_")) == 0)
 836                 {
 837                         if (val == 0ULL)
 838                                 continue;
 839
 840                         /* Ignore `prepared statements' */
 841                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 842                                 counter_submit ("mysql_commands",
 843                                                 key + strlen ("Com_"),
 844                                                 val, db);
 845                 }
 846                 else if (strncmp (key, "Handler_",
 847                                         strlen ("Handler_")) == 0)
 848                 {
 849                         if (val == 0ULL)
 850                                 continue;
 851
 852                         counter_submit ("mysql_handler",
 853                                         key + strlen ("Handler_"),
 854                                         val, db);
 855                 }
 856                 else if (strncmp (key, "Qcache_",
 857                                         strlen ("Qcache_")) == 0)
 858                 {
 859                         if (strcmp (key, "Qcache_hits") == 0)
 860                                 qcache_hits = (derive_t) val;
 861                         else if (strcmp (key, "Qcache_inserts") == 0)
 862                                 qcache_inserts = (derive_t) val;
 863                         else if (strcmp (key, "Qcache_not_cached") == 0)
 864                                 qcache_not_cached = (derive_t) val;
 865                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 866                                 qcache_lowmem_prunes = (derive_t) val;
 867                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 868                                 qcache_queries_in_cache = (gauge_t) val;
 869                 }
 870                 else if (strncmp (key, "Bytes_",
 871                                         strlen ("Bytes_")) == 0)
 872                 {
 873                         if (strcmp (key, "Bytes_received") == 0)
 874                                 traffic_incoming += val;
 875                         else if (strcmp (key, "Bytes_sent") == 0)
 876                                 traffic_outgoing += val;
 877                 }
 878                 else if (strncmp (key, "Threads_",
 879                                         strlen ("Threads_")) == 0)
 880                 {
 881                         if (strcmp (key, "Threads_running") == 0)
 882                                 threads_running = (gauge_t) val;
 883                         else if (strcmp (key, "Threads_connected") == 0)
 884                                 threads_connected = (gauge_t) val;
 885                         else if (strcmp (key, "Threads_cached") == 0)
 886                                 threads_cached = (gauge_t) val;
 887                         else if (strcmp (key, "Threads_created") == 0)
 888                                 threads_created = (derive_t) val;
 889                 }
 890                 else if (strncmp (key, "Table_locks_",
 891                                         strlen ("Table_locks_")) == 0)
 892                 {
 893                         counter_submit ("mysql_locks",
 894                                         key + strlen ("Table_locks_"),
 895                                         val, db);
 896                 }
 897                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 898                 {
 899                         /* buffer pool */
 900                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 901                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 902                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 903                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 904                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 905                                 counter_submit ("mysql_bpool_counters", "pages_flushed", val, db);
 906                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 907                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 908                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 909                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 910                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 911                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 912                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 913                                 counter_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 914                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 915                                 counter_submit ("mysql_bpool_counters", "read_ahead", val, db);
 916                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 917                                 counter_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 918                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 919                                 counter_submit ("mysql_bpool_counters", "read_requests", val, db);
 920                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 921                                 counter_submit ("mysql_bpool_counters", "reads", val, db);
 922                         else if (strcmp (key, "Innodb_buffer_pool_wait_free") == 0)
 923                                 counter_submit ("mysql_bpool_counters", "wait_free", val, db);
 924                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 925                                 counter_submit ("mysql_bpool_counters", "write_requests", val, db);
 926                         else if (strcmp (key, "Innodb_buffer_pool_bytes_data") == 0)
 927                                 gauge_submit ("mysql_bpool_bytes", "data", val, db);
 928                         else if (strcmp (key, "Innodb_buffer_pool_bytes_dirty") == 0)
 929                                 gauge_submit ("mysql_bpool_bytes", "dirty", val, db);
 930
 931                         /* data */
 932                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 933                                 counter_submit ("mysql_innodb_data", "fsyncs", val, db);
 934                         else if (strcmp (key, "Innodb_data_read") == 0)
 935                                 counter_submit ("mysql_innodb_data", "read", val, db);
 936                         else if (strcmp (key, "Innodb_data_reads") == 0)
 937                                 counter_submit ("mysql_innodb_data", "reads", val, db);
 938                         else if (strcmp (key, "Innodb_data_writes") == 0)
 939                                 counter_submit ("mysql_innodb_data", "writes", val, db);
 940                         else if (strcmp (key, "Innodb_data_written") == 0)
 941                                 counter_submit ("mysql_innodb_data", "written", val, db);
 942
 943                         /* double write */
 944                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 945                                 counter_submit ("mysql_innodb_dblwr", "writes", val, db);
 946                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 947                                 counter_submit ("mysql_innodb_dblwr", "written", val, db);
 948                         else if (strcmp (key, "Innodb_dblwr_page_size") == 0)
 949                                 gauge_submit ("mysql_innodb_dblwr", "page_size", val, db);
 950
 951                         /* log */
 952                         else if (strcmp (key, "Innodb_log_waits") == 0)
 953                                 counter_submit ("mysql_innodb_log", "waits", val, db);
 954                         else if (strcmp (key, "Innodb_log_write_requests") == 0)
 955                                 counter_submit ("mysql_innodb_log", "write_requests", val, db);
 956                         else if (strcmp (key, "Innodb_log_writes") == 0)
 957                                 counter_submit ("mysql_innodb_log", "writes", val, db);
 958                         else if (strcmp (key, "Innodb_os_log_fsyncs") == 0)
 959                                 counter_submit ("mysql_innodb_log", "fsyncs", val, db);
 960                         else if (strcmp (key, "Innodb_os_log_written") == 0)
 961                                 counter_submit ("mysql_innodb_log", "written", val, db);
 962
 963                         /* pages */
 964                         else if (strcmp (key, "Innodb_pages_created") == 0)
 965                                 counter_submit ("mysql_innodb_pages", "created", val, db);
 966                         else if (strcmp (key, "Innodb_pages_read") == 0)
 967                                 counter_submit ("mysql_innodb_pages", "read", val, db);
 968                         else if (strcmp (key, "Innodb_pages_written") == 0)
 969                                 counter_submit ("mysql_innodb_pages", "written", val, db);
 970
 971                         /* row lock */
 972                         else if (strcmp (key, "Innodb_row_lock_time") == 0)
 973                                 counter_submit ("mysql_innodb_row_lock", "time", val, db);
 974                         else if (strcmp (key, "Innodb_row_lock_waits") == 0)
 975                                 counter_submit ("mysql_innodb_row_lock", "waits", val, db);
 976
 977                         /* rows */
 978                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 979                                 counter_submit ("mysql_innodb_rows", "deleted", val, db);
 980                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 981                                 counter_submit ("mysql_innodb_rows", "inserted", val, db);
 982                         else if (strcmp (key, "Innodb_rows_read") == 0)
 983                                 counter_submit ("mysql_innodb_rows", "read", val, db);
 984                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 985                                 counter_submit ("mysql_innodb_rows", "updated", val, db);
 986                 }
 987                 else if (strncmp (key, "Select_", strlen ("Select_")) == 0)
 988                 {
 989                         counter_submit ("mysql_select", key + strlen ("Select_"),
 990                                         val, db);
 991                 }
 992                 else if (strncmp (key, "Sort_", strlen ("Sort_")) == 0)
 993                 {
 994                         if (strcmp (key, "Sort_merge_passes") == 0)
 995                                 counter_submit ("mysql_sort_merge_passes", NULL, val, db);
 996                         else if (strcmp (key, "Sort_rows") == 0)
 997                                 counter_submit ("mysql_sort_rows", NULL, val, db);
 998                         else if (strcmp (key, "Sort_range") == 0)
 999                                 counter_submit ("mysql_sort", "range", val, db);
1000                         else if (strcmp (key, "Sort_scan") == 0)
1001                                 counter_submit ("mysql_sort", "scan", val, db);
1002
1003                 }
1004                 else if (strncmp (key, "Slow_queries", strlen ("Slow_queries")) == 0)
1005                 {
1006                         counter_submit ("mysql_slow_queries", NULL , val, db);
1007                 }
1008         }
1009         mysql_free_result (res); res = NULL;
1010
1011         if ((qcache_hits != 0)
1012                         || (qcache_inserts != 0)
1013                         || (qcache_not_cached != 0)
1014                         || (qcache_lowmem_prunes != 0))
1015         {
1016                 derive_submit ("cache_result", "qcache-hits",
1017                                 qcache_hits, db);
1018                 derive_submit ("cache_result", "qcache-inserts",
1019                                 qcache_inserts, db);
1020                 derive_submit ("cache_result", "qcache-not_cached",
1021                                 qcache_not_cached, db);
1022                 derive_submit ("cache_result", "qcache-prunes",
1023                                 qcache_lowmem_prunes, db);
1024
1025                 gauge_submit ("cache_size", "qcache",
1026                                 qcache_queries_in_cache, db);
1027         }
1028
1029         if (threads_created != 0)
1030         {
1031                 gauge_submit ("threads", "running",
1032                                 threads_running, db);
1033                 gauge_submit ("threads", "connected",
1034                                 threads_connected, db);
1035                 gauge_submit ("threads", "cached",
1036                                 threads_cached, db);
1037
1038                 derive_submit ("total_threads", "created",
1039                                 threads_created, db);
1040         }
1041
1042         traffic_submit  (traffic_incoming, traffic_outgoing, db);
1043
1044         if (mysql_version >= 50600 && db->innodb_stats)
1045                 mysql_read_innodb_stats (db, con);
1046
1047         if (db->master_stats)
1048                 mysql_read_master_stats (db, con);
1049
1050         if ((db->slave_stats) || (db->slave_notif))
1051                 mysql_read_slave_stats (db, con);
1052
1053         if (db->wsrep_stats)
1054                 mysql_read_wsrep_stats (db, con);
1055
1056         return (0);
1057 } /* int mysql_read */
1058
1059 void module_register (void)
1060 {
1061         plugin_register_complex_config ("mysql", mysql_config);
1062 } /* void module_register */