/**
* collectd - src/mysql.c
- * Copyright (C) 2006 Florian octo Forster
+ * Copyright (C) 2006-2009 Florian octo Forster
+ * Copyright (C) 2008 Mirko Buffoni
+ * Copyright (C) 2009 Doug MacEachern
+ * Copyright (C) 2009 Sebastian tokkee Harl
+ * Copyright (C) 2009 Rodolphe Quiédeville
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
*
* Authors:
* Florian octo Forster <octo at verplant.org>
+ * Mirko Buffoni <briareos at eswat.org>
+ * Doug MacEachern <dougm at hyperic.com>
+ * Sebastian tokkee Harl <sh at tokkee.org>
+ * Rodolphe Quiédeville <rquiedeville at bearstech.com>
**/
#include "collectd.h"
#include "plugin.h"
#include "configfile.h"
-#ifdef HAVE_MYSQL_MYSQL_H
+#ifdef HAVE_MYSQL_H
+#include <mysql.h>
+#elif defined(HAVE_MYSQL_MYSQL_H)
#include <mysql/mysql.h>
#endif
-#define MODULE_NAME "mysql"
+/* TODO: Understand `Select_*' and possibly do that stuff as well.. */
-#if COLLECT_LIBMYSQL
-# define MYSQL_HAVE_READ 1
-#else
-# define MYSQL_HAVE_READ 0
-#endif
+struct mysql_database_s /* {{{ */
+{
+ /* instance == NULL => legacy mode */
+ char *instance;
+ char *host;
+ char *user;
+ char *pass;
+ char *database;
+ char *socket;
+ int port;
+
+ int master_stats;
+ int slave_stats;
+
+ int slave_notif;
+ int slave_io_running;
+ int slave_sql_running;
+
+ MYSQL *con;
+ int state;
+};
+typedef struct mysql_database_s mysql_database_t; /* }}} */
-#define BUFSIZE 512
+static int mysql_read (user_data_t *ud);
-static char *host = "localhost";
-static char *user;
-static char *pass;
-static char *db = NULL;
+static void mysql_database_free (void *arg) /* {{{ */
+{
+ mysql_database_t *db;
-/* TODO
- * understand `Select_*' and possibly do that stuff as well..
- */
+ DEBUG ("mysql plugin: mysql_database_free (arg = %p);", arg);
-static char *commands_file = "mysql/mysql_commands-%s.rrd";
-static char *handler_file = "mysql/mysql_handler-%s.rrd";
-static char *qcache_file = "mysql/mysql_qcache.rrd";
-static char *threads_file = "mysql/mysql_threads.rrd";
-static char *traffic_file = "traffic-mysql.rrd";
+ db = (mysql_database_t *) arg;
-static char *commands_ds_def[] =
-{
- "DS:value:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- NULL
-};
-static int commands_ds_num = 1;
+ if (db == NULL)
+ return;
-static char *handler_ds_def[] =
-{
- "DS:value:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- NULL
-};
-static int handler_ds_num = 1;
+ if (db->con != NULL)
+ mysql_close (db->con);
-static char *qcache_ds_def[] =
-{
- "DS:hits:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- "DS:inserts:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- "DS:not_cached:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- "DS:lowmem_prunes:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- "DS:queries_in_cache:GAUGE:"COLLECTD_HEARTBEAT":0:U",
- NULL
-};
-static int qcache_ds_num = 5;
+ sfree (db->host);
+ sfree (db->user);
+ sfree (db->pass);
+ sfree (db->socket);
+ sfree (db->instance);
+ sfree (db->database);
+ sfree (db);
+} /* }}} void mysql_database_free */
+
+/* Configuration handling functions {{{
+ *
+ * <Plugin mysql>
+ * <Database "plugin_instance1">
+ * Host "localhost"
+ * Port 22000
+ * ...
+ * </Database>
+ * </Plugin>
+ */
-static char *threads_ds_def[] =
+static int mysql_config_set_string (char **ret_string, /* {{{ */
+ oconfig_item_t *ci)
{
- "DS:running:GAUGE:"COLLECTD_HEARTBEAT":0:U",
- "DS:connected:GAUGE:"COLLECTD_HEARTBEAT":0:U",
- "DS:cached:GAUGE:"COLLECTD_HEARTBEAT":0:U",
- "DS:created:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- NULL
-};
-static int threads_ds_num = 4;
+ char *string;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("mysql plugin: The `%s' config option "
+ "needs exactly one string argument.", ci->key);
+ return (-1);
+ }
+
+ string = strdup (ci->values[0].value.string);
+ if (string == NULL)
+ {
+ ERROR ("mysql plugin: strdup failed.");
+ return (-1);
+ }
+
+ if (*ret_string != NULL)
+ free (*ret_string);
+ *ret_string = string;
+
+ return (0);
+} /* }}} int mysql_config_set_string */
-static char *traffic_ds_def[] =
+static int mysql_config_set_int (int *ret_int, /* {{{ */
+ oconfig_item_t *ci)
{
- "DS:incoming:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- "DS:outgoing:COUNTER:"COLLECTD_HEARTBEAT":0:U",
- NULL
-};
-static int traffic_ds_num = 2;
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+ {
+ WARNING ("mysql plugin: The `%s' config option "
+ "needs exactly one string argument.", ci->key);
+ return (-1);
+ }
-static char *config_keys[] =
+ *ret_int = ci->values[0].value.number;
+
+ return (0);
+} /* }}} int mysql_config_set_int */
+
+static int mysql_config_set_boolean (int *ret_boolean, /* {{{ */
+ oconfig_item_t *ci)
{
- "Host",
- "User",
- "Password",
- "Database",
- NULL
-};
-static int config_keys_num = 4;
+ int status = 0;
+
+ if (ci->values_num != 1)
+ status = -1;
+
+ if (status == 0)
+ {
+ if (ci->values[0].type == OCONFIG_TYPE_BOOLEAN)
+ *ret_boolean = ci->values[0].value.boolean;
+ else if (ci->values[0].type == OCONFIG_TYPE_STRING)
+ {
+ if (IS_TRUE (ci->values[0].value.string))
+ *ret_boolean = 1;
+ else if (IS_FALSE (ci->values[0].value.string))
+ *ret_boolean = 0;
+ else
+ status = -1;
+ }
+ else
+ status = -1;
+ }
-#if MYSQL_HAVE_READ
-static MYSQL *getconnection (void)
+ if (status != 0)
+ {
+ WARNING ("mysql plugin: The `%s' config option "
+ "needs exactly one boolean argument.", ci->key);
+ return (-1);
+ }
+ return (0);
+} /* }}} mysql_config_set_boolean */
+
+static int mysql_config (oconfig_item_t *ci) /* {{{ */
{
- static MYSQL *con;
- static int state;
+ mysql_database_t *db;
+ int plugin_block;
+ int status = 0;
+ int i;
- static int wait_for = 0;
- static int wait_increase = 60;
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("mysql plugin: The `Database' block "
+ "needs exactly one string argument.");
+ return (-1);
+ }
- int step;
+ db = (mysql_database_t *) malloc (sizeof (*db));
+ if (db == NULL)
+ {
+ ERROR ("mysql plugin: malloc failed.");
+ return (-1);
+ }
+ memset (db, 0, sizeof (*db));
+
+ /* initialize all the pointers */
+ db->host = NULL;
+ db->user = NULL;
+ db->pass = NULL;
+ db->database = NULL;
+ db->socket = NULL;
+ db->con = NULL;
+
+ /* trigger a notification, if it's not running */
+ db->slave_io_running = 1;
+ db->slave_sql_running = 1;
+
+ plugin_block = 1;
+ if (strcasecmp ("Plugin", ci->key) == 0)
+ {
+ db->instance = NULL;
+ }
+ else if (strcasecmp ("Database", ci->key) == 0)
+ {
+ plugin_block = 0;
+ status = mysql_config_set_string (&db->instance, ci);
+ if (status != 0)
+ {
+ sfree (db);
+ return (status);
+ }
+ assert (db->instance != NULL);
+ }
+ else
+ {
+ ERROR ("mysql plugin: mysql_config: "
+ "Invalid key: %s", ci->key);
+ return (-1);
+ }
- if (state != 0)
+ /* Fill the `mysql_database_t' structure.. */
+ for (i = 0; i < ci->children_num; i++)
{
- int err;
- if ((err = mysql_ping (con)) != 0)
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Host", child->key) == 0)
+ status = mysql_config_set_string (&db->host, child);
+ else if (strcasecmp ("User", child->key) == 0)
+ status = mysql_config_set_string (&db->user, child);
+ else if (strcasecmp ("Password", child->key) == 0)
+ status = mysql_config_set_string (&db->pass, child);
+ else if (strcasecmp ("Port", child->key) == 0)
+ status = mysql_config_set_int (&db->port, child);
+ else if (strcasecmp ("Socket", child->key) == 0)
+ status = mysql_config_set_string (&db->socket, child);
+ /* Check if we're currently handling the `Plugin' block. If so,
+ * handle `Database' _blocks_, too. */
+ else if ((plugin_block != 0)
+ && (strcasecmp ("Database", child->key) == 0)
+ && (child->children != NULL))
{
- syslog (LOG_WARNING, "mysql_ping failed: %s", mysql_error (con));
- state = 0;
+ /* If `plugin_block > 1', there has been at least one
+ * `Database' block */
+ plugin_block++;
+ status = mysql_config (child);
}
+ /* Now handle ordinary `Database' options (without children) */
+ else if ((strcasecmp ("Database", child->key) == 0)
+ && (child->children == NULL))
+ status = mysql_config_set_string (&db->database, child);
+ else if (strcasecmp ("MasterStats", child->key) == 0)
+ status = mysql_config_set_boolean (&db->master_stats, child);
+ else if (strcasecmp ("SlaveStats", child->key) == 0)
+ status = mysql_config_set_boolean (&db->slave_stats, child);
+ else if (strcasecmp ("SlaveNotifications", child->key) == 0)
+ status = mysql_config_set_boolean (&db->slave_notif, child);
else
{
- state = 1;
- return (con);
+ WARNING ("mysql plugin: Option `%s' not allowed here.", child->key);
+ status = -1;
+ }
+
+ if (status != 0)
+ break;
+ }
+
+ /* Check if there were any `Database' blocks. */
+ if (plugin_block > 1)
+ {
+ /* There were connection blocks. Don't use any legacy stuff. */
+ if ((db->host != NULL)
+ || (db->user != NULL)
+ || (db->pass != NULL)
+ || (db->database != NULL)
+ || (db->socket != NULL)
+ || (db->port != 0))
+ {
+ WARNING ("mysql plugin: At least one <Database> "
+ "block has been found. The legacy "
+ "configuration will be ignored.");
}
+ mysql_database_free (db);
+ return (0);
+ }
+ else if (plugin_block != 0)
+ {
+ WARNING ("mysql plugin: You're using the legacy "
+ "configuration options. Please consider "
+ "updating your configuration!");
}
- step = atoi (COLLECTD_STEP);
+ /* Check that all necessary options have been given. */
+ while (status == 0)
+ {
+ /* Zero is allowed and automatically handled by
+ * `mysql_real_connect'. */
+ if ((db->port < 0) || (db->port > 65535))
+ {
+ ERROR ("mysql plugin: Database %s: Port number out "
+ "of range: %i",
+ (db->instance != NULL)
+ ? db->instance
+ : "<legacy>",
+ db->port);
+ status = -1;
+ }
+ break;
+ } /* while (status == 0) */
- if (wait_for > 0)
+ /* If all went well, register this database for reading */
+ if (status == 0)
{
- wait_for -= step;
- return (NULL);
+ user_data_t ud;
+ char cb_name[DATA_MAX_NAME_LEN];
+
+ DEBUG ("mysql plugin: Registering new read callback: %s",
+ (db->database != NULL) ? db->database : "<default>");
+
+ memset (&ud, 0, sizeof (ud));
+ ud.data = (void *) db;
+ ud.free_func = mysql_database_free;
+
+ if (db->database != NULL)
+ ssnprintf (cb_name, sizeof (cb_name), "mysql-%s",
+ db->database);
+ else
+ sstrncpy (cb_name, "mysql", sizeof (cb_name));
+
+ plugin_register_complex_read (/* group = */ NULL, cb_name,
+ mysql_read,
+ /* interval = */ NULL, &ud);
+ }
+ else
+ {
+ mysql_database_free (db);
+ return (-1);
}
- wait_for = wait_increase;
- wait_increase *= 2;
- if (wait_increase > 86400)
- wait_increase = 86400;
+ return (0);
+} /* }}} int mysql_config */
+
+/* }}} End of configuration handling functions */
+
+static MYSQL *getconnection (mysql_database_t *db)
+{
+ if (db->state != 0)
+ {
+ int err;
+ if ((err = mysql_ping (db->con)) != 0)
+ {
+ WARNING ("mysql_ping failed for %s: %s",
+ (db->instance != NULL)
+ ? db->instance
+ : "<legacy>",
+ mysql_error (db->con));
+ db->state = 0;
+ }
+ else
+ {
+ db->state = 1;
+ return (db->con);
+ }
+ }
- if ((con = mysql_init (con)) == NULL)
+ if ((db->con = mysql_init (db->con)) == NULL)
{
- syslog (LOG_ERR, "mysql_init failed: %s", mysql_error (con));
- state = 0;
+ ERROR ("mysql_init failed: %s", mysql_error (db->con));
+ db->state = 0;
return (NULL);
}
- if (mysql_real_connect (con, host, user, pass, db, 0, NULL, 0) == NULL)
+ if (mysql_real_connect (db->con, db->host, db->user, db->pass,
+ db->database, db->port, db->socket, 0) == NULL)
{
- syslog (LOG_ERR, "mysql_real_connect failed: %s", mysql_error (con));
- state = 0;
+ ERROR ("mysql plugin: Failed to connect to database %s "
+ "at server %s: %s",
+ (db->database != NULL) ? db->database : "<none>",
+ (db->host != NULL) ? db->host : "localhost",
+ mysql_error (db->con));
+ db->state = 0;
return (NULL);
}
else
{
- state = 1;
- wait_for = 0;
- wait_increase = 60;
- return (con);
+ INFO ("mysql plugin: Successfully connected to database %s "
+ "at server %s (server version: %s, protocol version: %d)",
+ (db->database != NULL) ? db->database : "<none>",
+ mysql_get_host_info (db->con),
+ mysql_get_server_info (db->con),
+ mysql_get_proto_info (db->con));
+ db->state = 1;
+ return (db->con);
}
-} /* static MYSQL *getconnection (void) */
-#endif /* MYSQL_HAVE_READ */
+} /* static MYSQL *getconnection (mysql_database_t *db) */
-static void init (void)
+static void set_host (mysql_database_t *db, char *buf, size_t buflen)
{
- return;
+ /* XXX legacy mode - use hostname_g */
+ if (db->instance == NULL)
+ sstrncpy (buf, hostname_g, buflen);
+ else
+ {
+ if ((db->host == NULL)
+ || (strcmp ("", db->host) == 0)
+ || (strcmp ("localhost", db->host) == 0))
+ sstrncpy (buf, hostname_g, buflen);
+ else
+ sstrncpy (buf, db->host, buflen);
+ }
}
-static int config (char *key, char *value)
+static void set_plugin_instance (mysql_database_t *db,
+ char *buf, size_t buflen)
{
- if (strcasecmp (key, "host") == 0)
- return ((host = strdup (value)) == NULL ? 1 : 0);
- else if (strcasecmp (key, "user") == 0)
- return ((user = strdup (value)) == NULL ? 1 : 0);
- else if (strcasecmp (key, "password") == 0)
- return ((pass = strdup (value)) == NULL ? 1 : 0);
- else if (strcasecmp (key, "database") == 0)
- return ((db = strdup (value)) == NULL ? 1 : 0);
+ /* XXX legacy mode - no plugin_instance */
+ if (db->instance == NULL)
+ sstrncpy (buf, "", buflen);
else
- return (-1);
+ sstrncpy (buf, db->instance, buflen);
}
-static void commands_write (char *host, char *inst, char *val)
+static void submit (const char *type, const char *type_instance,
+ value_t *values, size_t values_len, mysql_database_t *db)
{
- char buf[BUFSIZE];
+ value_list_t vl = VALUE_LIST_INIT;
- if (snprintf (buf, BUFSIZE, commands_file, inst) >= BUFSIZE)
- return;
+ vl.values = values;
+ vl.values_len = values_len;
- rrd_update_file (host, buf, val, commands_ds_def, commands_ds_num);
-}
+ set_host (db, vl.host, sizeof (vl.host));
-static void handler_write (char *host, char *inst, char *val)
-{
- char buf[BUFSIZE];
+ sstrncpy (vl.plugin, "mysql", sizeof (vl.plugin));
+ set_plugin_instance (db, vl.plugin_instance, sizeof (vl.plugin_instance));
- if (snprintf (buf, BUFSIZE, handler_file, inst) >= BUFSIZE)
- return;
+ sstrncpy (vl.type, type, sizeof (vl.type));
+ if (type_instance != NULL)
+ sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
- rrd_update_file (host, buf, val, handler_ds_def, handler_ds_num);
-}
+ plugin_dispatch_values (&vl);
+} /* submit */
-static void qcache_write (char *host, char *inst, char *val)
+static void counter_submit (const char *type, const char *type_instance,
+ counter_t value, mysql_database_t *db)
{
- rrd_update_file (host, qcache_file, val,
- qcache_ds_def, qcache_ds_num);
-}
+ value_t values[1];
-static void threads_write (char *host, char *inst, char *val)
+ values[0].counter = value;
+ submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
+} /* void counter_submit */
+
+static void gauge_submit (const char *type, const char *type_instance,
+ gauge_t value, mysql_database_t *db)
{
- rrd_update_file (host, threads_file, val,
- threads_ds_def, threads_ds_num);
-}
+ value_t values[1];
-static void traffic_write (char *host, char *inst, char *val)
+ values[0].gauge = value;
+ submit (type, type_instance, values, STATIC_ARRAY_SIZE (values), db);
+} /* void gauge_submit */
+
+static void qcache_submit (counter_t hits, counter_t inserts,
+ counter_t not_cached, counter_t lowmem_prunes,
+ gauge_t queries_in_cache, mysql_database_t *db)
{
- rrd_update_file (host, traffic_file, val,
- traffic_ds_def, traffic_ds_num);
-}
+ value_t values[5];
-#if MYSQL_HAVE_READ
-static void commands_submit (char *inst, unsigned long long value)
+ values[0].counter = hits;
+ values[1].counter = inserts;
+ values[2].counter = not_cached;
+ values[3].counter = lowmem_prunes;
+ values[4].gauge = queries_in_cache;
+
+ submit ("mysql_qcache", NULL, values, STATIC_ARRAY_SIZE (values), db);
+} /* void qcache_submit */
+
+static void threads_submit (gauge_t running, gauge_t connected, gauge_t cached,
+ counter_t created, mysql_database_t *db)
{
- char buf[BUFSIZE];
- int status;
+ value_t values[4];
- status = snprintf (buf, BUFSIZE, "%u:%llu", (unsigned int) curtime, value);
+ values[0].gauge = running;
+ values[1].gauge = connected;
+ values[2].gauge = cached;
+ values[3].counter = created;
- if (status < 0)
- {
- syslog (LOG_ERR, "snprintf failed");
- return;
- }
- else if (status >= BUFSIZE)
- {
- syslog (LOG_WARNING, "snprintf was truncated");
- return;
- }
+ submit ("mysql_threads", NULL, values, STATIC_ARRAY_SIZE (values), db);
+} /* void threads_submit */
- plugin_submit ("mysql_commands", inst, buf);
-}
+static void traffic_submit (counter_t rx, counter_t tx, mysql_database_t *db)
+{
+ value_t values[2];
+
+ values[0].counter = rx;
+ values[1].counter = tx;
-static void handler_submit (char *inst, unsigned long long value)
+ submit ("mysql_octets", NULL, values, STATIC_ARRAY_SIZE (values), db);
+} /* void traffic_submit */
+
+static MYSQL_RES *exec_query (MYSQL *con, const char *query)
{
- char buf[BUFSIZE];
- int status;
+ MYSQL_RES *res;
- status = snprintf (buf, BUFSIZE, "%u:%llu", (unsigned int) curtime, value);
+ int query_len = strlen (query);
- if (status < 0)
+ if (mysql_real_query (con, query, query_len))
{
- syslog (LOG_ERR, "snprintf failed");
- return;
+ ERROR ("mysql plugin: Failed to execute query: %s",
+ mysql_error (con));
+ INFO ("mysql plugin: SQL query was: %s", query);
+ return (NULL);
}
- else if (status >= BUFSIZE)
+
+ res = mysql_store_result (con);
+ if (res == NULL)
{
- syslog (LOG_WARNING, "snprintf was truncated");
- return;
+ ERROR ("mysql plugin: Failed to store query result: %s",
+ mysql_error (con));
+ INFO ("mysql plugin: SQL query was: %s", query);
+ return (NULL);
}
- plugin_submit ("mysql_handler", inst, buf);
-}
+ return (res);
+} /* exec_query */
-static void qcache_submit (unsigned long long hits, unsigned long long inserts,
- unsigned long long not_cached, unsigned long long lowmem_prunes,
- int queries_in_cache)
+static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
{
- char buf[BUFSIZE];
- int status;
+ MYSQL_RES *res;
+ MYSQL_ROW row;
- status = snprintf (buf, BUFSIZE, "%u:%llu:%llu:%llu:%llu:%i",
- (unsigned int) curtime, hits, inserts, not_cached,
- lowmem_prunes, queries_in_cache);
+ char *query;
+ int field_num;
+ unsigned long long position;
- if (status < 0)
+ query = "SHOW MASTER STATUS";
+
+ res = exec_query (con, query);
+ if (res == NULL)
+ return (-1);
+
+ row = mysql_fetch_row (res);
+ if (row == NULL)
{
- syslog (LOG_ERR, "snprintf failed");
- return;
+ ERROR ("mysql plugin: Failed to get master statistics: "
+ "`%s' did not return any rows.", query);
+ return (-1);
}
- else if (status >= BUFSIZE)
+
+ field_num = mysql_num_fields (res);
+ if (field_num < 2)
{
- syslog (LOG_WARNING, "snprintf was truncated");
- return;
+ ERROR ("mysql plugin: Failed to get master statistics: "
+ "`%s' returned less than two columns.", query);
+ return (-1);
}
- plugin_submit ("mysql_qcache", "-", buf);
-}
+ position = atoll (row[1]);
+ counter_submit ("mysql_log_position", "master-bin", position, db);
+
+ row = mysql_fetch_row (res);
+ if (row != NULL)
+ WARNING ("mysql plugin: `%s' returned more than one row - "
+ "ignoring further results.", query);
-static void threads_submit (int running, int connected, int cached,
- unsigned long long created)
+ mysql_free_result (res);
+
+ return (0);
+} /* mysql_read_master_stats */
+
+static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
{
- char buf[BUFSIZE];
- int status;
+ MYSQL_RES *res;
+ MYSQL_ROW row;
- status = snprintf (buf, BUFSIZE, "%u:%i:%i:%i:%llu",
- (unsigned int) curtime,
- running, connected, cached, created);
+ char *query;
+ int field_num;
- if (status < 0)
+ /* WTF? libmysqlclient does not seem to provide any means to
+ * translate a column name to a column index ... :-/ */
+ const int READ_MASTER_LOG_POS_IDX = 6;
+ const int SLAVE_IO_RUNNING_IDX = 10;
+ const int SLAVE_SQL_RUNNING_IDX = 11;
+ const int EXEC_MASTER_LOG_POS_IDX = 21;
+ const int SECONDS_BEHIND_MASTER_IDX = 32;
+
+ query = "SHOW SLAVE STATUS";
+
+ res = exec_query (con, query);
+ if (res == NULL)
+ return (-1);
+
+ row = mysql_fetch_row (res);
+ if (row == NULL)
{
- syslog (LOG_ERR, "snprintf failed");
- return;
+ ERROR ("mysql plugin: Failed to get slave statistics: "
+ "`%s' did not return any rows.", query);
+ return (-1);
}
- else if (status >= BUFSIZE)
+
+ field_num = mysql_num_fields (res);
+ if (field_num < 33)
{
- syslog (LOG_WARNING, "snprintf was truncated");
- return;
+ ERROR ("mysql plugin: Failed to get slave statistics: "
+ "`%s' returned less than 33 columns.", query);
+ return (-1);
}
- plugin_submit ("mysql_threads", "-", buf);
-}
+ if (db->slave_stats)
+ {
+ unsigned long long counter;
+ double gauge;
-static void traffic_submit (unsigned long long incoming,
- unsigned long long outgoing)
-{
- char buf[BUFSIZE];
- int status;
+ counter = atoll (row[READ_MASTER_LOG_POS_IDX]);
+ counter_submit ("mysql_log_position", "slave-read", counter, db);
- status = snprintf (buf, BUFSIZE, "%u:%llu:%llu", (unsigned int) curtime,
- incoming, outgoing);
+ counter = atoll (row[EXEC_MASTER_LOG_POS_IDX]);
+ counter_submit ("mysql_log_position", "slave-exec", counter, db);
- if (status < 0)
- {
- syslog (LOG_ERR, "snprintf failed");
- return;
+ if (row[SECONDS_BEHIND_MASTER_IDX] != NULL)
+ {
+ gauge = atof (row[SECONDS_BEHIND_MASTER_IDX]);
+ gauge_submit ("time_offset", NULL, gauge, db);
+ }
}
- else if (status >= BUFSIZE)
+
+ if (db->slave_notif)
{
- syslog (LOG_WARNING, "snprintf was truncated");
- return;
+ notification_t n = { 0, time (NULL), "", "",
+ "mysql", "", "time_offset", "", NULL };
+
+ char *io, *sql;
+
+ io = row[SLAVE_IO_RUNNING_IDX];
+ sql = row[SLAVE_SQL_RUNNING_IDX];
+
+ set_host (db, n.host, sizeof (n.host));
+ set_plugin_instance (db,
+ n.plugin_instance, sizeof (n.plugin_instance));
+
+ if (((io == NULL) || (strcasecmp (io, "yes") != 0))
+ && (db->slave_io_running))
+ {
+ n.severity = NOTIF_WARNING;
+ ssnprintf (n.message, sizeof (n.message),
+ "slave I/O thread not started or not connected to master");
+ plugin_dispatch_notification (&n);
+ db->slave_io_running = 0;
+ }
+ else if (((io != NULL) && (strcasecmp (io, "yes") == 0))
+ && (! db->slave_io_running))
+ {
+ n.severity = NOTIF_OKAY;
+ ssnprintf (n.message, sizeof (n.message),
+ "slave I/O thread started and connected to master");
+ plugin_dispatch_notification (&n);
+ db->slave_io_running = 1;
+ }
+
+ if (((sql == NULL) || (strcasecmp (sql, "yes") != 0))
+ && (db->slave_sql_running))
+ {
+ n.severity = NOTIF_WARNING;
+ ssnprintf (n.message, sizeof (n.message),
+ "slave SQL thread not started");
+ plugin_dispatch_notification (&n);
+ db->slave_sql_running = 0;
+ }
+ else if (((sql != NULL) && (strcasecmp (sql, "yes") == 0))
+ && (! db->slave_sql_running))
+ {
+ n.severity = NOTIF_OKAY;
+ ssnprintf (n.message, sizeof (n.message),
+ "slave SQL thread started");
+ plugin_dispatch_notification (&n);
+ db->slave_sql_running = 0;
+ }
}
- plugin_submit ("mysql_traffic", "-", buf);
-}
+ row = mysql_fetch_row (res);
+ if (row != NULL)
+ WARNING ("mysql plugin: `%s' returned more than one row - "
+ "ignoring further results.", query);
+
+ mysql_free_result (res);
+
+ return (0);
+} /* mysql_read_slave_stats */
-static void mysql_read (void)
+static int mysql_read (user_data_t *ud)
{
+ mysql_database_t *db;
MYSQL *con;
MYSQL_RES *res;
MYSQL_ROW row;
char *query;
- int query_len;
- int field_num;
unsigned long long qcache_hits = 0ULL;
unsigned long long qcache_inserts = 0ULL;
unsigned long long traffic_incoming = 0ULL;
unsigned long long traffic_outgoing = 0ULL;
+ if ((ud == NULL) || (ud->data == NULL))
+ {
+ ERROR ("mysql plugin: mysql_database_read: Invalid user data.");
+ return (-1);
+ }
+
+ db = (mysql_database_t *) ud->data;
+
/* An error message will have been printed in this case */
- if ((con = getconnection ()) == NULL)
- return;
+ if ((con = getconnection (db)) == NULL)
+ return (-1);
query = "SHOW STATUS";
if (mysql_get_server_version (con) >= 50002)
query = "SHOW GLOBAL STATUS";
- query_len = strlen (query);
-
- if (mysql_real_query (con, query, query_len))
- {
- syslog (LOG_ERR, "mysql_real_query failed: %s\n",
- mysql_error (con));
- return;
- }
-
- if ((res = mysql_store_result (con)) == NULL)
- {
- syslog (LOG_ERR, "mysql_store_result failed: %s\n",
- mysql_error (con));
- return;
- }
+ res = exec_query (con, query);
+ if (res == NULL)
+ return (-1);
- field_num = mysql_num_fields (res);
+ mysql_num_fields (res);
while ((row = mysql_fetch_row (res)))
{
char *key;
key = row[0];
val = atoll (row[1]);
- if (strncmp (key, "Com_", 4) == 0)
+ if (strncmp (key, "Com_",
+ strlen ("Com_")) == 0)
{
if (val == 0ULL)
continue;
/* Ignore `prepared statements' */
- if (strncmp (key, "Com_stmt_", 9) != 0)
- commands_submit (key + 4, val);
+ if (strncmp (key, "Com_stmt_", strlen ("Com_stmt_")) != 0)
+ counter_submit ("mysql_commands",
+ key + strlen ("Com_"),
+ val, db);
}
- else if (strncmp (key, "Handler_", 8) == 0)
+ else if (strncmp (key, "Handler_",
+ strlen ("Handler_")) == 0)
{
if (val == 0ULL)
continue;
- handler_submit (key + 8, val);
+ counter_submit ("mysql_handler",
+ key + strlen ("Handler_"),
+ val, db);
}
- else if (strncmp (key, "Qcache_", 7) == 0)
+ else if (strncmp (key, "Qcache_",
+ strlen ("Qcache_")) == 0)
{
if (strcmp (key, "Qcache_hits") == 0)
qcache_hits = val;
else if (strcmp (key, "Qcache_queries_in_cache") == 0)
qcache_queries_in_cache = (int) val;
}
- else if (strncmp (key, "Bytes_", 6) == 0)
+ else if (strncmp (key, "Bytes_",
+ strlen ("Bytes_")) == 0)
{
if (strcmp (key, "Bytes_received") == 0)
traffic_incoming += val;
else if (strcmp (key, "Bytes_sent") == 0)
traffic_outgoing += val;
}
- else if (strncmp (key, "Threads_", 8) == 0)
+ else if (strncmp (key, "Threads_",
+ strlen ("Threads_")) == 0)
{
if (strcmp (key, "Threads_running") == 0)
threads_running = (int) val;
else if (strcmp (key, "Threads_created") == 0)
threads_created = val;
}
+ else if (strncmp (key, "Table_locks_",
+ strlen ("Table_locks_")) == 0)
+ {
+ counter_submit ("mysql_locks",
+ key + strlen ("Table_locks_"),
+ val, db);
+ }
}
mysql_free_result (res); res = NULL;
|| (qcache_not_cached != 0ULL)
|| (qcache_lowmem_prunes != 0ULL))
qcache_submit (qcache_hits, qcache_inserts, qcache_not_cached,
- qcache_lowmem_prunes, qcache_queries_in_cache);
+ qcache_lowmem_prunes, qcache_queries_in_cache, db);
if (threads_created != 0ULL)
threads_submit (threads_running, threads_connected,
- threads_cached, threads_created);
+ threads_cached, threads_created, db);
- traffic_submit (traffic_incoming, traffic_outgoing);
+ traffic_submit (traffic_incoming, traffic_outgoing, db);
- /* mysql_close (con); */
+ if (db->master_stats)
+ mysql_read_master_stats (db, con);
- return;
-}
-#else
-# define mysql_read NULL
-#endif /* MYSQL_HAVE_READ */
+ if ((db->slave_stats) || (db->slave_notif))
+ mysql_read_slave_stats (db, con);
+
+ return (0);
+} /* int mysql_read */
void module_register (void)
{
- plugin_register (MODULE_NAME, init, mysql_read, NULL);
- plugin_register ("mysql_commands", NULL, NULL, commands_write);
- plugin_register ("mysql_handler", NULL, NULL, handler_write);
- plugin_register ("mysql_qcache", NULL, NULL, qcache_write);
- plugin_register ("mysql_threads", NULL, NULL, threads_write);
- plugin_register ("mysql_traffic", NULL, NULL, traffic_write);
- cf_register (MODULE_NAME, config, config_keys, config_keys_num);
-}
-
-#undef BUFSIZE
-#undef MODULE_NAME
+ plugin_register_complex_config ("mysql", mysql_config);
+} /* void module_register */
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