09df017528
Auto-rejoin now explains more accurately if a server cannot be joined due to conflicting gtid. Also, auto-rejoin is no longer disabled if a join fails. Usually the fail is due to the server not replying fast enough with query completion. The query is often completed anyways. This can lead to some log spam.
92 lines
4.5 KiB
C
92 lines
4.5 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: 2020-01-01
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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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#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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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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bool ignore_external_masters; /**< Ignore masters outside of the monitor configuration */
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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_MONITORED_SERVER *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_set_standalone_master; /**< Log a warning when setting standalone master */
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bool auto_failover; /**< If automatic master failover is enabled */
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bool warn_failover_precond; /**< Print failover preconditions error message? */
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uint32_t failover_timeout; /**< Timeout in seconds for the master failover */
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uint32_t switchover_timeout; /**< Timeout in seconds for the master switchover */
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char* replication_user; /**< Replication user for failover */
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char* replication_password; /**< Replication password for failover*/
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bool verify_master_failure; /**< Whether master failure is verified via slaves */
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int master_failure_timeout; /**< Time in seconds to wait before doing failover */
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int64_t master_gtid_domain; /**< Gtid domain currently used by the master */
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char external_master_host[MAX_SERVER_ADDRESS_LEN]; /**< External master host, for fail/switchover */
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int external_master_port; /**< External master port */
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bool auto_rejoin; /**< Attempt to start slave replication on standalone servers or servers
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replicating from the wrong master. */
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bool warn_cannot_rejoin; /**< Print warning if auto_rejoin fails because of invalid gtid:s? */
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bool enforce_read_only_slaves; /**< Should the monitor set read-only=1 on any slave servers. */
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int n_excluded; /**< Number of excluded servers */
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MXS_MONITORED_SERVER** excluded_servers; /**< Servers banned for master promotion during auto-failover. */
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const char* promote_sql_file; /**< File with sql commands which are ran to a server being promoted. */
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const char* demote_sql_file; /**< File with sql commands which are ran to a server being demoted. */
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MXS_MONITOR* monitor;
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} MYSQL_MONITOR;
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MXS_END_DECLS
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#endif
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