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                 plugin_register_complex_read (/* group = */ NULL, cb_name,
 237                                 mysql_read, /* interval = */ 0, &(user_data_t) {
 238                                         .data = db,
 239                                         .free_func = mysql_database_free,
 240                                 });
 241         }
 242         else
 243         {
 244                 mysql_database_free (db);
 245                 return (-1);
 246         }
 247
 248         return (0);
 249 } /* }}} int mysql_config_database */
 250
 251 static int mysql_config (oconfig_item_t *ci) /* {{{ */
 252 {
 253         if (ci == NULL)
 254                 return (EINVAL);
 255
 256         /* Fill the `mysql_database_t' structure.. */
 257         for (int i = 0; i < ci->children_num; i++)
 258         {
 259                 oconfig_item_t *child = ci->children + i;
 260
 261                 if (strcasecmp ("Database", child->key) == 0)
 262                         mysql_config_database (child);
 263                 else
 264                         WARNING ("mysql plugin: Option \"%s\" not allowed here.",
 265                                         child->key);
 266         }
 267
 268         return (0);
 269 } /* }}} int mysql_config */
 270
 271 /* }}} End of configuration handling functions */
 272
 273 static MYSQL *getconnection (mysql_database_t *db)
 274 {
 275         const char *cipher;
 276
 277         if (db->is_connected)
 278         {
 279                 int status;
 280
 281                 status = mysql_ping (db->con);
 282                 if (status == 0)
 283                         return (db->con);
 284
 285                 WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
 286                                 db->instance, mysql_error (db->con));
 287         }
 288         db->is_connected = 0;
 289
 290         if (db->con == NULL)
 291         {
 292                 db->con = mysql_init (NULL);
 293                 if (db->con == NULL)
 294                 {
 295                         ERROR ("mysql plugin: mysql_init failed: %s",
 296                                         mysql_error (db->con));
 297                         return (NULL);
 298                 }
 299         }
 300
 301         /* Configure TCP connect timeout (default: 0) */
 302         db->con->options.connect_timeout = db->timeout;
 303
 304         mysql_ssl_set (db->con, db->key, db->cert, db->ca, db->capath, db->cipher);
 305
 306         if (mysql_real_connect (db->con, db->host, db->user, db->pass,
 307                                 db->database, db->port, db->socket, 0) == NULL)
 308         {
 309                 ERROR ("mysql plugin: Failed to connect to database %s "
 310                                 "at server %s: %s",
 311                                 (db->database != NULL) ? db->database : "<none>",
 312                                 (db->host != NULL) ? db->host : "localhost",
 313                                 mysql_error (db->con));
 314                 return (NULL);
 315         }
 316
 317         cipher = mysql_get_ssl_cipher (db->con);
 318
 319         INFO ("mysql plugin: Successfully connected to database %s "
 320                         "at server %s with cipher %s "
 321                         "(server version: %s, protocol version: %d) ",
 322                         (db->database != NULL) ? db->database : "<none>",
 323                         mysql_get_host_info (db->con),
 324                         (cipher != NULL) ?  cipher : "<none>",
 325                         mysql_get_server_info (db->con),
 326                         mysql_get_proto_info (db->con));
 327
 328         db->is_connected = 1;
 329         return (db->con);
 330 } /* static MYSQL *getconnection (mysql_database_t *db) */
 331
 332 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
 333 {
 334         if (db->alias)
 335                 sstrncpy (buf, db->alias, buflen);
 336         else if ((db->host == NULL)
 337                         || (strcmp ("", db->host) == 0)
 338                         || (strcmp ("127.0.0.1", db->host) == 0)
 339                         || (strcmp ("localhost", db->host) == 0))
 340                 sstrncpy (buf, hostname_g, buflen);
 341         else
 342                 sstrncpy (buf, db->host, buflen);
 343 } /* void set_host */
 344
 345 static void submit (const char *type, const char *type_instance,
 346                 value_t *values, size_t values_len, mysql_database_t *db)
 347 {
 348         value_list_t vl = VALUE_LIST_INIT;
 349
 350         vl.values     = values;
 351         vl.values_len = values_len;
 352
 353         set_host (db, vl.host, sizeof (vl.host));
 354
 355         sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
 356
 357         /* Assured by "mysql_config_database" */
 358         assert (db->instance != NULL);
 359         sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance));
 360
 361         sstrncpy (vl.type, type, sizeof (vl.type));
 362         if (type_instance != NULL)
 363                 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
 364
 365         plugin_dispatch_values (&vl);
 366 } /* submit */
 367
 368 static void gauge_submit (const char *type, const char *type_instance,
 369                 gauge_t value, mysql_database_t *db)
 370 {
 371         submit (type, type_instance, &(value_t) { .gauge = value }, 1, db);
 372 } /* void gauge_submit */
 373
 374 static void derive_submit (const char *type, const char *type_instance,
 375                 derive_t value, mysql_database_t *db)
 376 {
 377         submit (type, type_instance, &(value_t) { .derive = value }, 1, db);
 378 } /* void derive_submit */
 379
 380 static void traffic_submit (derive_t rx, derive_t tx, mysql_database_t *db)
 381 {
 382         value_t values[] = {
 383                 { .derive = rx },
 384                 { .derive = tx },
 385         };
 386
 387         submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
 388 } /* void traffic_submit */
 389
 390 static MYSQL_RES *exec_query (MYSQL *con, const char *query)
 391 {
 392         MYSQL_RES *res;
 393
 394         int query_len = strlen (query);
 395
 396         if (mysql_real_query (con, query, query_len))
 397         {
 398                 ERROR ("mysql plugin: Failed to execute query: %s",
 399                                 mysql_error (con));
 400                 INFO ("mysql plugin: SQL query was: %s", query);
 401                 return (NULL);
 402         }
 403
 404         res = mysql_store_result (con);
 405         if (res == NULL)
 406         {
 407                 ERROR ("mysql plugin: Failed to store query result: %s",
 408                                 mysql_error (con));
 409                 INFO ("mysql plugin: SQL query was: %s", query);
 410                 return (NULL);
 411         }
 412
 413         return (res);
 414 } /* exec_query */
 415
 416 static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
 417 {
 418         MYSQL_RES *res;
 419         MYSQL_ROW  row;
 420
 421         const char *query;
 422         int         field_num;
 423         unsigned long long position;
 424
 425         query = "SHOW MASTER STATUS";
 426
 427         res = exec_query (con, query);
 428         if (res == NULL)
 429                 return (-1);
 430
 431         row = mysql_fetch_row (res);
 432         if (row == NULL)
 433         {
 434                 ERROR ("mysql plugin: Failed to get master statistics: "
 435                                 "`%s' did not return any rows.", query);
 436                 mysql_free_result (res);
 437                 return (-1);
 438         }
 439
 440         field_num = mysql_num_fields (res);
 441         if (field_num < 2)
 442         {
 443                 ERROR ("mysql plugin: Failed to get master statistics: "
 444                                 "`%s' returned less than two columns.", query);
 445                 mysql_free_result (res);
 446                 return (-1);
 447         }
 448
 449         position = atoll (row[1]);
 450         derive_submit ("mysql_log_position", "master-bin", position, db);
 451
 452         row = mysql_fetch_row (res);
 453         if (row != NULL)
 454                 WARNING ("mysql plugin: `%s' returned more than one row - "
 455                                 "ignoring further results.", query);
 456
 457         mysql_free_result (res);
 458
 459         return (0);
 460 } /* mysql_read_master_stats */
 461
 462 static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
 463 {
 464         MYSQL_RES *res;
 465         MYSQL_ROW  row;
 466
 467         const char *query;
 468         int         field_num;
 469
 470         /* WTF? libmysqlclient does not seem to provide any means to
 471          * translate a column name to a column index ... :-/ */
 472         const int READ_MASTER_LOG_POS_IDX   = 6;
 473         const int SLAVE_IO_RUNNING_IDX      = 10;
 474         const int SLAVE_SQL_RUNNING_IDX     = 11;
 475         const int EXEC_MASTER_LOG_POS_IDX   = 21;
 476         const int SECONDS_BEHIND_MASTER_IDX = 32;
 477
 478         query = "SHOW SLAVE STATUS";
 479
 480         res = exec_query (con, query);
 481         if (res == NULL)
 482                 return (-1);
 483
 484         row = mysql_fetch_row (res);
 485         if (row == NULL)
 486         {
 487                 ERROR ("mysql plugin: Failed to get slave statistics: "
 488                                 "`%s' did not return any rows.", query);
 489                 mysql_free_result (res);
 490                 return (-1);
 491         }
 492
 493         field_num = mysql_num_fields (res);
 494         if (field_num < 33)
 495         {
 496                 ERROR ("mysql plugin: Failed to get slave statistics: "
 497                                 "`%s' returned less than 33 columns.", query);
 498                 mysql_free_result (res);
 499                 return (-1);
 500         }
 501
 502         if (db->slave_stats)
 503         {
 504                 unsigned long long counter;
 505                 double gauge;
 506
 507                 counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
 508                 derive_submit ("mysql_log_position", "slave-read", counter, db);
 509
 510                 counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
 511                 derive_submit ("mysql_log_position", "slave-exec", counter, db);
 512
 513                 if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
 514                 {
 515                         gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
 516                         gauge_submit ("time_offset", NULL, gauge, db);
 517                 }
 518         }
 519
 520         if (db->slave_notif)
 521         {
 522                 notification_t n = { 0, cdtime (), "", "",
 523                         "mysql", "", "time_offset", "", NULL };
 524
 525                 char *io, *sql;
 526
 527                 io  = row[SLAVE_IO_RUNNING_IDX];
 528                 sql = row[SLAVE_SQL_RUNNING_IDX];
 529
 530                 set_host (db, n.host, sizeof (n.host));
 531
 532                 /* Assured by "mysql_config_database" */
 533                 assert (db->instance != NULL);
 534                 sstrncpy (n.plugin_instance, db->instance, sizeof (n.plugin_instance));
 535
 536                 if (((io == NULL) || (strcasecmp (io, "yes") != 0))
 537                                 && (db->slave_io_running))
 538                 {
 539                         n.severity = NOTIF_WARNING;
 540                         ssnprintf (n.message, sizeof (n.message),
 541                                         "slave I/O thread not started or not connected to master");
 542                         plugin_dispatch_notification (&n);
 543                         db->slave_io_running = 0;
 544                 }
 545                 else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
 546                                 && (! db->slave_io_running))
 547                 {
 548                         n.severity = NOTIF_OKAY;
 549                         ssnprintf (n.message, sizeof (n.message),
 550                                         "slave I/O thread started and connected to master");
 551                         plugin_dispatch_notification (&n);
 552                         db->slave_io_running = 1;
 553                 }
 554
 555                 if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
 556                                 && (db->slave_sql_running))
 557                 {
 558                         n.severity = NOTIF_WARNING;
 559                         ssnprintf (n.message, sizeof (n.message),
 560                                         "slave SQL thread not started");
 561                         plugin_dispatch_notification (&n);
 562                         db->slave_sql_running = 0;
 563                 }
 564                 else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
 565                                 && (! db->slave_sql_running))
 566                 {
 567                         n.severity = NOTIF_OKAY;
 568                         ssnprintf (n.message, sizeof (n.message),
 569                                         "slave SQL thread started");
 570                         plugin_dispatch_notification (&n);
 571                         db->slave_sql_running = 1;
 572                 }
 573         }
 574
 575         row = mysql_fetch_row (res);
 576         if (row != NULL)
 577                 WARNING ("mysql plugin: `%s' returned more than one row - "
 578                                 "ignoring further results.", query);
 579
 580         mysql_free_result (res);
 581
 582         return (0);
 583 } /* mysql_read_slave_stats */
 584
 585 static int mysql_read_innodb_stats (mysql_database_t *db, MYSQL *con)
 586 {
 587         MYSQL_RES *res;
 588         MYSQL_ROW  row;
 589
 590         const char *query;
 591         struct {
 592                 const char *key;
 593                 const char *type;
 594                 int ds_type;
 595         } metrics[] = {
 596                 { "metadata_mem_pool_size",          "bytes",        DS_TYPE_GAUGE },
 597                 { "lock_deadlocks",                  "mysql_locks",  DS_TYPE_DERIVE },
 598                 { "lock_timeouts",                   "mysql_locks",  DS_TYPE_DERIVE },
 599                 { "lock_row_lock_current_waits",     "mysql_locks",  DS_TYPE_DERIVE },
 600                 { "buffer_pool_size",                "bytes",        DS_TYPE_GAUGE },
 601
 602                 { "os_log_bytes_written",            "operations",   DS_TYPE_DERIVE },
 603                 { "os_log_pending_fsyncs",           "operations",   DS_TYPE_DERIVE },
 604                 { "os_log_pending_writes",           "operations",   DS_TYPE_DERIVE },
 605
 606                 { "trx_rseg_history_len",            "gauge",        DS_TYPE_GAUGE },
 607
 608                 { "adaptive_hash_searches",          "operations",   DS_TYPE_DERIVE },
 609
 610                 { "file_num_open_files",             "gauge",        DS_TYPE_GAUGE },
 611
 612                 { "ibuf_merges_insert",              "operations",   DS_TYPE_DERIVE },
 613                 { "ibuf_merges_delete_mark",         "operations",   DS_TYPE_DERIVE },
 614                 { "ibuf_merges_delete",              "operations",   DS_TYPE_DERIVE },
 615                 { "ibuf_merges_discard_insert",      "operations",   DS_TYPE_DERIVE },
 616                 { "ibuf_merges_discard_delete_mark", "operations",   DS_TYPE_DERIVE },
 617                 { "ibuf_merges_discard_delete",      "operations",   DS_TYPE_DERIVE },
 618                 { "ibuf_merges_discard_merges",      "operations",   DS_TYPE_DERIVE },
 619                 { "ibuf_size",                       "bytes",        DS_TYPE_GAUGE },
 620
 621                 { "innodb_activity_count",           "gauge",        DS_TYPE_GAUGE },
 622
 623                 { "innodb_rwlock_s_spin_waits",      "operations",   DS_TYPE_DERIVE },
 624                 { "innodb_rwlock_x_spin_waits",      "operations",   DS_TYPE_DERIVE },
 625                 { "innodb_rwlock_s_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 626                 { "innodb_rwlock_x_spin_rounds",     "operations",   DS_TYPE_DERIVE },
 627                 { "innodb_rwlock_s_os_waits",        "operations",   DS_TYPE_DERIVE },
 628                 { "innodb_rwlock_x_os_waits",        "operations",   DS_TYPE_DERIVE },
 629
 630                 { "dml_reads",                       "operations",   DS_TYPE_DERIVE },
 631                 { "dml_inserts",                     "operations",   DS_TYPE_DERIVE },
 632                 { "dml_deletes",                     "operations",   DS_TYPE_DERIVE },
 633                 { "dml_updates",                     "operations",   DS_TYPE_DERIVE },
 634
 635                 { NULL,                              NULL,           0}
 636         };
 637
 638         query = "SELECT name, count, type FROM information_schema.innodb_metrics WHERE status = 'enabled'";
 639
 640         res = exec_query (con, query);
 641         if (res == NULL)
 642                 return (-1);
 643
 644         while ((row = mysql_fetch_row (res)))
 645         {
 646                 int i;
 647                 char *key;
 648                 unsigned long long val;
 649
 650                 key = row[0];
 651                 val = atoll (row[1]);
 652
 653                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 654                         ;
 655
 656                 if (metrics[i].key == NULL)
 657                         continue;
 658
 659                 switch (metrics[i].ds_type) {
 660                         case DS_TYPE_COUNTER:
 661                                 derive_submit(metrics[i].type, key, (counter_t)val, db);
 662                                 break;
 663                         case DS_TYPE_GAUGE:
 664                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 665                                 break;
 666                         case DS_TYPE_DERIVE:
 667                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 668                                 break;
 669                 }
 670         }
 671
 672         mysql_free_result(res);
 673         return (0);
 674 }
 675
 676 static int mysql_read_wsrep_stats (mysql_database_t *db, MYSQL *con)
 677 {
 678         MYSQL_RES *res;
 679         MYSQL_ROW  row;
 680
 681         const char *query;
 682         struct {
 683                 const char *key;
 684                 const char *type;
 685                 int ds_type;
 686         } metrics[] = {
 687
 688                 { "wsrep_apply_oooe",                "operations",   DS_TYPE_DERIVE },
 689                 { "wsrep_apply_oool",                "operations",   DS_TYPE_DERIVE },
 690                 { "wsrep_causal_reads",              "operations",   DS_TYPE_DERIVE },
 691                 { "wsrep_commit_oooe",               "operations",   DS_TYPE_DERIVE },
 692                 { "wsrep_commit_oool",               "operations",   DS_TYPE_DERIVE },
 693                 { "wsrep_flow_control_recv",         "operations",   DS_TYPE_DERIVE },
 694                 { "wsrep_flow_control_sent",         "operations",   DS_TYPE_DERIVE },
 695                 { "wsrep_flow_control_paused",       "operations",   DS_TYPE_DERIVE },
 696                 { "wsrep_local_bf_aborts",           "operations",   DS_TYPE_DERIVE },
 697                 { "wsrep_local_cert_failures",       "operations",   DS_TYPE_DERIVE },
 698                 { "wsrep_local_commits",             "operations",   DS_TYPE_DERIVE },
 699                 { "wsrep_local_replays",             "operations",   DS_TYPE_DERIVE },
 700                 { "wsrep_received",                  "operations",   DS_TYPE_DERIVE },
 701                 { "wsrep_replicated",                "operations",   DS_TYPE_DERIVE },
 702
 703                 { "wsrep_received_bytes",            "total_bytes",  DS_TYPE_DERIVE },
 704                 { "wsrep_replicated_bytes",          "total_bytes",  DS_TYPE_DERIVE },
 705
 706                 { "wsrep_apply_window",              "gauge",        DS_TYPE_GAUGE },
 707                 { "wsrep_commit_window",             "gauge",        DS_TYPE_GAUGE },
 708
 709                 { "wsrep_cluster_size",              "gauge",        DS_TYPE_GAUGE },
 710                 { "wsrep_cert_deps_distance",        "gauge",        DS_TYPE_GAUGE },
 711
 712                 { "wsrep_local_recv_queue",          "queue_length", DS_TYPE_GAUGE },
 713                 { "wsrep_local_send_queue",          "queue_length", DS_TYPE_GAUGE },
 714
 715                 { NULL,                              NULL,           0}
 716
 717         };
 718
 719         query = "SHOW GLOBAL STATUS LIKE 'wsrep_%'";
 720
 721         res = exec_query (con, query);
 722         if (res == NULL)
 723                 return (-1);
 724
 725         row = mysql_fetch_row (res);
 726         if (row == NULL)
 727         {
 728                 ERROR ("mysql plugin: Failed to get wsrep statistics: "
 729                         "`%s' did not return any rows.", query);
 730                 mysql_free_result (res);
 731                 return (-1);
 732         }
 733
 734         while ((row = mysql_fetch_row (res)))
 735         {
 736                 int i;
 737                 char *key;
 738                 unsigned long long val;
 739
 740                 key = row[0];
 741                 val = atoll (row[1]);
 742
 743                 for (i = 0; metrics[i].key != NULL && strcmp(metrics[i].key, key) != 0; i++)
 744                         ;
 745
 746                 if (metrics[i].key == NULL)
 747                         continue;
 748
 749                 switch (metrics[i].ds_type) {
 750                         case DS_TYPE_GAUGE:
 751                                 gauge_submit(metrics[i].type, key, (gauge_t)val, db);
 752                                 break;
 753                         case DS_TYPE_DERIVE:
 754                                 derive_submit(metrics[i].type, key, (derive_t)val, db);
 755                                 break;
 756                 }
 757         }
 758
 759         mysql_free_result(res);
 760         return (0);
 761 } /* mysql_read_wsrep_stats */
 762
 763 static int mysql_read (user_data_t *ud)
 764 {
 765         mysql_database_t *db;
 766         MYSQL      *con;
 767         MYSQL_RES  *res;
 768         MYSQL_ROW   row;
 769         const char *query;
 770
 771         derive_t qcache_hits          = 0;
 772         derive_t qcache_inserts       = 0;
 773         derive_t qcache_not_cached    = 0;
 774         derive_t qcache_lowmem_prunes = 0;
 775         gauge_t qcache_queries_in_cache = NAN;
 776
 777         gauge_t threads_running   = NAN;
 778         gauge_t threads_connected = NAN;
 779         gauge_t threads_cached    = NAN;
 780         derive_t threads_created = 0;
 781
 782         unsigned long long traffic_incoming = 0ULL;
 783         unsigned long long traffic_outgoing = 0ULL;
 784         unsigned long mysql_version = 0ULL;
 785
 786         if ((ud == NULL) || (ud->data == NULL))
 787         {
 788                 ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
 789                 return (-1);
 790         }
 791
 792         db = (mysql_database_t *) ud->data;
 793
 794         /* An error message will have been printed in this case */
 795         if ((con = getconnection (db)) == NULL)
 796                 return (-1);
 797
 798         mysql_version = mysql_get_server_version(con);
 799
 800         query = "SHOW STATUS";
 801         if (mysql_version >= 50002)
 802                 query = "SHOW GLOBAL STATUS";
 803
 804         res = exec_query (con, query);
 805         if (res == NULL)
 806                 return (-1);
 807
 808         while ((row = mysql_fetch_row (res)))
 809         {
 810                 char *key;
 811                 unsigned long long val;
 812
 813                 key = row[0];
 814                 val = atoll (row[1]);
 815
 816                 if (strncmp (key, "Com_",
 817                                   strlen ("Com_")) == 0)
 818                 {
 819                         if (val == 0ULL)
 820                                 continue;
 821
 822                         /* Ignore `prepared statements' */
 823                         if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
 824                                 derive_submit ("mysql_commands",
 825                                                 key + strlen ("Com_"),
 826                                                 val, db);
 827                 }
 828                 else if (strncmp (key, "Handler_",
 829                                         strlen ("Handler_")) == 0)
 830                 {
 831                         if (val == 0ULL)
 832                                 continue;
 833
 834                         derive_submit ("mysql_handler",
 835                                         key + strlen ("Handler_"),
 836                                         val, db);
 837                 }
 838                 else if (strncmp (key, "Qcache_",
 839                                         strlen ("Qcache_")) == 0)
 840                 {
 841                         if (strcmp (key, "Qcache_hits") == 0)
 842                                 qcache_hits = (derive_t) val;
 843                         else if (strcmp (key, "Qcache_inserts") == 0)
 844                                 qcache_inserts = (derive_t) val;
 845                         else if (strcmp (key, "Qcache_not_cached") == 0)
 846                                 qcache_not_cached = (derive_t) val;
 847                         else if (strcmp (key, "Qcache_lowmem_prunes") == 0)
 848                                 qcache_lowmem_prunes = (derive_t) val;
 849                         else if (strcmp (key, "Qcache_queries_in_cache") == 0)
 850                                 qcache_queries_in_cache = (gauge_t) val;
 851                 }
 852                 else if (strncmp (key, "Bytes_",
 853                                         strlen ("Bytes_")) == 0)
 854                 {
 855                         if (strcmp (key, "Bytes_received") == 0)
 856                                 traffic_incoming += val;
 857                         else if (strcmp (key, "Bytes_sent") == 0)
 858                                 traffic_outgoing += val;
 859                 }
 860                 else if (strncmp (key, "Threads_",
 861                                         strlen ("Threads_")) == 0)
 862                 {
 863                         if (strcmp (key, "Threads_running") == 0)
 864                                 threads_running = (gauge_t) val;
 865                         else if (strcmp (key, "Threads_connected") == 0)
 866                                 threads_connected = (gauge_t) val;
 867                         else if (strcmp (key, "Threads_cached") == 0)
 868                                 threads_cached = (gauge_t) val;
 869                         else if (strcmp (key, "Threads_created") == 0)
 870                                 threads_created = (derive_t) val;
 871                 }
 872                 else if (strncmp (key, "Table_locks_",
 873                                         strlen ("Table_locks_")) == 0)
 874                 {
 875                         derive_submit ("mysql_locks",
 876                                         key + strlen ("Table_locks_"),
 877                                         val, db);
 878                 }
 879                 else if (db->innodb_stats && strncmp (key, "Innodb_", strlen ("Innodb_")) == 0)
 880                 {
 881                         /* buffer pool */
 882                         if (strcmp (key, "Innodb_buffer_pool_pages_data") == 0)
 883                                 gauge_submit ("mysql_bpool_pages", "data", val, db);
 884                         else if (strcmp (key, "Innodb_buffer_pool_pages_dirty") == 0)
 885                                 gauge_submit ("mysql_bpool_pages", "dirty", val, db);
 886                         else if (strcmp (key, "Innodb_buffer_pool_pages_flushed") == 0)
 887                                 derive_submit ("mysql_bpool_counters", "pages_flushed", val, db);
 888                         else if (strcmp (key, "Innodb_buffer_pool_pages_free") == 0)
 889                                 gauge_submit ("mysql_bpool_pages", "free", val, db);
 890                         else if (strcmp (key, "Innodb_buffer_pool_pages_misc") == 0)
 891                                 gauge_submit ("mysql_bpool_pages", "misc", val, db);
 892                         else if (strcmp (key, "Innodb_buffer_pool_pages_total") == 0)
 893                                 gauge_submit ("mysql_bpool_pages", "total", val, db);
 894                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_rnd") == 0)
 895                                 derive_submit ("mysql_bpool_counters", "read_ahead_rnd", val, db);
 896                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead") == 0)
 897                                 derive_submit ("mysql_bpool_counters", "read_ahead", val, db);
 898                         else if (strcmp (key, "Innodb_buffer_pool_read_ahead_evicted") == 0)
 899                                 derive_submit ("mysql_bpool_counters", "read_ahead_evicted", val, db);
 900                         else if (strcmp (key, "Innodb_buffer_pool_read_requests") == 0)
 901                                 derive_submit ("mysql_bpool_counters", "read_requests", val, db);
 902                         else if (strcmp (key, "Innodb_buffer_pool_reads") == 0)
 903                                 derive_submit ("mysql_bpool_counters", "reads", val, db);
 904                         else if (strcmp (key, "Innodb_buffer_pool_wait_free") == 0)
 905                                 derive_submit ("mysql_bpool_counters", "wait_free", val, db);
 906                         else if (strcmp (key, "Innodb_buffer_pool_write_requests") == 0)
 907                                 derive_submit ("mysql_bpool_counters", "write_requests", val, db);
 908                         else if (strcmp (key, "Innodb_buffer_pool_bytes_data") == 0)
 909                                 gauge_submit ("mysql_bpool_bytes", "data", val, db);
 910                         else if (strcmp (key, "Innodb_buffer_pool_bytes_dirty") == 0)
 911                                 gauge_submit ("mysql_bpool_bytes", "dirty", val, db);
 912
 913                         /* data */
 914                         if (strcmp (key, "Innodb_data_fsyncs") == 0)
 915                                 derive_submit ("mysql_innodb_data", "fsyncs", val, db);
 916                         else if (strcmp (key, "Innodb_data_read") == 0)
 917                                 derive_submit ("mysql_innodb_data", "read", val, db);
 918                         else if (strcmp (key, "Innodb_data_reads") == 0)
 919                                 derive_submit ("mysql_innodb_data", "reads", val, db);
 920                         else if (strcmp (key, "Innodb_data_writes") == 0)
 921                                 derive_submit ("mysql_innodb_data", "writes", val, db);
 922                         else if (strcmp (key, "Innodb_data_written") == 0)
 923                                 derive_submit ("mysql_innodb_data", "written", val, db);
 924
 925                         /* double write */
 926                         else if (strcmp (key, "Innodb_dblwr_writes") == 0)
 927                                 derive_submit ("mysql_innodb_dblwr", "writes", val, db);
 928                         else if (strcmp (key, "Innodb_dblwr_pages_written") == 0)
 929                                 derive_submit ("mysql_innodb_dblwr", "written", val, db);
 930                         else if (strcmp (key, "Innodb_dblwr_page_size") == 0)
 931                                 gauge_submit ("mysql_innodb_dblwr", "page_size", val, db);
 932
 933                         /* log */
 934                         else if (strcmp (key, "Innodb_log_waits") == 0)
 935                                 derive_submit ("mysql_innodb_log", "waits", val, db);
 936                         else if (strcmp (key, "Innodb_log_write_requests") == 0)
 937                                 derive_submit ("mysql_innodb_log", "write_requests", val, db);
 938                         else if (strcmp (key, "Innodb_log_writes") == 0)
 939                                 derive_submit ("mysql_innodb_log", "writes", val, db);
 940                         else if (strcmp (key, "Innodb_os_log_fsyncs") == 0)
 941                                 derive_submit ("mysql_innodb_log", "fsyncs", val, db);
 942                         else if (strcmp (key, "Innodb_os_log_written") == 0)
 943                                 derive_submit ("mysql_innodb_log", "written", val, db);
 944
 945                         /* pages */
 946                         else if (strcmp (key, "Innodb_pages_created") == 0)
 947                                 derive_submit ("mysql_innodb_pages", "created", val, db);
 948                         else if (strcmp (key, "Innodb_pages_read") == 0)
 949                                 derive_submit ("mysql_innodb_pages", "read", val, db);
 950                         else if (strcmp (key, "Innodb_pages_written") == 0)
 951                                 derive_submit ("mysql_innodb_pages", "written", val, db);
 952
 953                         /* row lock */
 954                         else if (strcmp (key, "Innodb_row_lock_time") == 0)
 955                                 derive_submit ("mysql_innodb_row_lock", "time", val, db);
 956                         else if (strcmp (key, "Innodb_row_lock_waits") == 0)
 957                                 derive_submit ("mysql_innodb_row_lock", "waits", val, db);
 958
 959                         /* rows */
 960                         else if (strcmp (key, "Innodb_rows_deleted") == 0)
 961                                 derive_submit ("mysql_innodb_rows", "deleted", val, db);
 962                         else if (strcmp (key, "Innodb_rows_inserted") == 0)
 963                                 derive_submit ("mysql_innodb_rows", "inserted", val, db);
 964                         else if (strcmp (key, "Innodb_rows_read") == 0)
 965                                 derive_submit ("mysql_innodb_rows", "read", val, db);
 966                         else if (strcmp (key, "Innodb_rows_updated") == 0)
 967                                 derive_submit ("mysql_innodb_rows", "updated", val, db);
 968                 }
 969                 else if (strncmp (key, "Select_", strlen ("Select_")) == 0)
 970                 {
 971                         derive_submit ("mysql_select", key + strlen ("Select_"),
 972                                         val, db);
 973                 }
 974                 else if (strncmp (key, "Sort_", strlen ("Sort_")) == 0)
 975                 {
 976                         if (strcmp (key, "Sort_merge_passes") == 0)
 977                                 derive_submit ("mysql_sort_merge_passes", NULL, val, db);
 978                         else if (strcmp (key, "Sort_rows") == 0)
 979                                 derive_submit ("mysql_sort_rows", NULL, val, db);
 980                         else if (strcmp (key, "Sort_range") == 0)
 981                                 derive_submit ("mysql_sort", "range", val, db);
 982                         else if (strcmp (key, "Sort_scan") == 0)
 983                                 derive_submit ("mysql_sort", "scan", val, db);
 984
 985                 }
 986                 else if (strncmp (key, "Slow_queries", strlen ("Slow_queries")) == 0)
 987                 {
 988                         derive_submit ("mysql_slow_queries", NULL , val, db);
 989                 }
 990         }
 991         mysql_free_result (res); res = NULL;
 992
 993         if ((qcache_hits != 0)
 994                         || (qcache_inserts != 0)
 995                         || (qcache_not_cached != 0)
 996                         || (qcache_lowmem_prunes != 0))
 997         {
 998                 derive_submit ("cache_result", "qcache-hits",
 999                                 qcache_hits, db);
1000                 derive_submit ("cache_result", "qcache-inserts",
1001                                 qcache_inserts, db);
1002                 derive_submit ("cache_result", "qcache-not_cached",
1003                                 qcache_not_cached, db);
1004                 derive_submit ("cache_result", "qcache-prunes",
1005                                 qcache_lowmem_prunes, db);
1006
1007                 gauge_submit ("cache_size", "qcache",
1008                                 qcache_queries_in_cache, db);
1009         }
1010
1011         if (threads_created != 0)
1012         {
1013                 gauge_submit ("threads", "running",
1014                                 threads_running, db);
1015                 gauge_submit ("threads", "connected",
1016                                 threads_connected, db);
1017                 gauge_submit ("threads", "cached",
1018                                 threads_cached, db);
1019
1020                 derive_submit ("total_threads", "created",
1021                                 threads_created, db);
1022         }
1023
1024         traffic_submit  (traffic_incoming, traffic_outgoing, db);
1025
1026         if (mysql_version >= 50600 && db->innodb_stats)
1027                 mysql_read_innodb_stats (db, con);
1028
1029         if (db->master_stats)
1030                 mysql_read_master_stats (db, con);
1031
1032         if ((db->slave_stats) || (db->slave_notif))
1033                 mysql_read_slave_stats (db, con);
1034
1035         if (db->wsrep_stats)
1036                 mysql_read_wsrep_stats (db, con);
1037
1038         return (0);
1039 } /* int mysql_read */
1040
1041 void module_register (void)
1042 {
1043         plugin_register_complex_config ("mysql", mysql_config);
1044 } /* void module_register */