08cc7a9515
The MySQL monitor stores the server states in a backup file which can be used to restore the state of the servers even if MaxScale is stoppen in an uncontrolled fashion.
109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
#pragma once
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#ifndef _MYSQLMON_H
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#define _MYSQLMON_H
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file mysqlmon.h - The MySQL monitor
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 08/07/13 Mark Riddoch Initial implementation
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* 26/05/14 Massimiliano Pinto Default values for MONITOR_INTERVAL
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* 28/05/14 Massimiliano Pinto Addition of new fields in MYSQL_MONITOR struct
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* 24/06/14 Massimiliano Pinto Addition of master field in MYSQL_MONITOR struct and MONITOR_MAX_NUM_SLAVES
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* 28/08/14 Massimiliano Pinto Addition of detectStaleMaster
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* 30/10/14 Massimiliano Pinto Addition of disableMasterFailback
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* 07/11/14 Massimiliano Pinto Addition of NetworkTimeout: connect, read, write
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* 20/04/15 Guillaume Lefranc Addition of availableWhenDonor
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* 22/04/15 Martin Brampton Addition of disableMasterRoleSetting
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* 07/05/15 Markus Makela Addition of command execution on Master server failure
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <maxscale/monitor.h>
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#include <maxscale/spinlock.h>
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#include <maxscale/thread.h>
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#include <mysql.h>
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#include <mysqld_error.h>
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#include <maxscale/log_manager.h>
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#include <maxscale/secrets.h>
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#include <maxscale/dcb.h>
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#include <maxscale/modinfo.h>
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#include <maxscale/config.h>
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#include <maxscale/hashtable.h>
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MXS_BEGIN_DECLS
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/**
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* The handle for an instance of a MySQL Monitor module
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*/
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typedef struct
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{
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SPINLOCK lock; /**< The monitor spinlock */
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THREAD thread; /**< Monitor thread */
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int shutdown; /**< Flag to shutdown the monitor thread */
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int status; /**< Monitor status */
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unsigned long id; /**< Monitor ID */
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int replicationHeartbeat; /**< Monitor flag for MySQL replication heartbeat */
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bool detectStaleMaster; /**< Monitor flag for MySQL replication Stale Master detection */
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bool detectStaleSlave; /**< Monitor flag for MySQL replication Stale Master detection */
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bool multimaster; /**< Detect and handle multi-master topologies */
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int disableMasterFailback; /**< Monitor flag for Galera Cluster Master failback */
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int availableWhenDonor; /**< Monitor flag for Galera Cluster Donor availability */
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int disableMasterRoleSetting; /**< Monitor flag to disable setting master role */
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bool mysql51_replication; /**< Use MySQL 5.1 replication */
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MXS_MONITOR_SERVERS *master; /**< Master server for MySQL Master/Slave replication */
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char* script; /*< Script to call when state changes occur on servers */
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uint64_t events; /*< enabled events */
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HASHTABLE *server_info; /**< Contains server specific information */
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bool detect_standalone_master; /**< If standalone master are detected */
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int failcount; /**< How many monitoring cycles servers must be
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down before failover is initiated */
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bool allow_cluster_recovery; /**< Allow failed servers to rejoin the cluster */
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bool warn_failover; /**< Log a warning when failover happens */
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bool load_backup; /**< Whether backup file should be loaded */
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} MYSQL_MONITOR;
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/**
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* @brief Store a backup of server states
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*
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* @param monitor Monitor to backup
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*/
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void store_server_backup(MXS_MONITOR *monitor);
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/**
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* @brief Load a backup of server states
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*
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* @param monitor Monitor where backup is loaded
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*/
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void load_server_backup(MXS_MONITOR *monitor);
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/**
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* @brief Remove stored backup file
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*
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* @param monitor Monitor whose backup is removed
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*/
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void remove_server_backup(MXS_MONITOR *monitor);
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MXS_END_DECLS
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#endif
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