MXS-1775 Add switchover_on_low_disk_space parameter
This commit is contained in:
Johan Wikman
parent
dc47835ef6
commit
b2a190c2b8
@ -35,12 +35,13 @@ const char * const CN_AUTO_FAILOVER = "auto_failover";
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const char * const CN_PROMOTION_SQL_FILE = "promotion_sql_file";
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const char * const CN_DEMOTION_SQL_FILE = "demotion_sql_file";
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static const char CN_AUTO_REJOIN[] = "auto_rejoin";
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static const char CN_FAILCOUNT[] = "failcount";
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static const char CN_ENFORCE_READONLY[] = "enforce_read_only_slaves";
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static const char CN_NO_PROMOTE_SERVERS[] = "servers_no_promotion";
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static const char CN_FAILOVER_TIMEOUT[] = "failover_timeout";
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static const char CN_SWITCHOVER_TIMEOUT[] = "switchover_timeout";
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static const char CN_AUTO_REJOIN[] = "auto_rejoin";
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static const char CN_FAILCOUNT[] = "failcount";
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static const char CN_ENFORCE_READONLY[] = "enforce_read_only_slaves";
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static const char CN_NO_PROMOTE_SERVERS[] = "servers_no_promotion";
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static const char CN_FAILOVER_TIMEOUT[] = "failover_timeout";
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static const char CN_SWITCHOVER_ON_LOW_DISK_SPACE[] = "switchover_on_low_disk_space";
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static const char CN_SWITCHOVER_TIMEOUT[] = "switchover_timeout";
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// Parameters for master failure verification and timeout
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static const char CN_VERIFY_MASTER_FAILURE[] = "verify_master_failure";
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@ -55,6 +56,7 @@ MariaDBMonitor::MariaDBMonitor(MXS_MONITOR* monitor)
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, m_master_gtid_domain(GTID_DOMAIN_UNKNOWN)
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, m_external_master_port(PORT_UNKNOWN)
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, m_cluster_modified(true)
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, m_switchover_on_low_disk_space(false)
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, m_warn_set_standalone_master(true)
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, m_log_no_master(true)
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{}
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@ -183,6 +185,7 @@ bool MariaDBMonitor::configure(const MXS_CONFIG_PARAMETER* params)
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m_master_failure_timeout = config_get_integer(params, CN_MASTER_FAILURE_TIMEOUT);
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m_promote_sql_file = config_get_string(params, CN_PROMOTION_SQL_FILE);
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m_demote_sql_file = config_get_string(params, CN_DEMOTION_SQL_FILE);
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m_switchover_on_low_disk_space = config_get_bool(params, CN_SWITCHOVER_ON_LOW_DISK_SPACE);
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m_excluded_servers.clear();
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MXS_MONITORED_SERVER** excluded_array = NULL;
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@ -1077,6 +1080,7 @@ extern "C" MXS_MODULE* MXS_CREATE_MODULE()
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{CN_NO_PROMOTE_SERVERS, MXS_MODULE_PARAM_SERVERLIST},
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{CN_PROMOTION_SQL_FILE, MXS_MODULE_PARAM_PATH},
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{CN_DEMOTION_SQL_FILE, MXS_MODULE_PARAM_PATH},
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{CN_SWITCHOVER_ON_LOW_DISK_SPACE, MXS_MODULE_PARAM_BOOL, "false"},
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{MXS_END_MODULE_PARAMS}
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}
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};
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@ -106,50 +106,51 @@ protected:
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void process_state_changes();
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private:
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unsigned long m_id; /**< Monitor ID */
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ServerArray m_servers; /**< Servers of the monitor */
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ServerInfoMap m_server_info; /**< Map from server base struct to MariaDBServer */
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CycleMap m_cycles; /**< Map from cycle number to cycle member servers */
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unsigned long m_id; /**< Monitor ID */
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ServerArray m_servers; /**< Servers of the monitor */
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ServerInfoMap m_server_info; /**< Map from server base struct to MariaDBServer */
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CycleMap m_cycles; /**< Map from cycle number to cycle member servers */
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// Values updated by monitor
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MariaDBServer* m_master; /**< Master server for Master/Slave replication */
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IdToServerMap m_servers_by_id; /**< Map from server id:s to MariaDBServer */
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int64_t m_master_gtid_domain; /**< gtid_domain_id most recently seen on the master */
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std::string m_external_master_host; /**< External master host, for fail/switchover */
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int m_external_master_port; /**< External master port */
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bool m_cluster_modified; /**< Has an automatic failover/rejoin been performed this loop? */
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MariaDBServer* m_master; /**< Master server for Master/Slave replication */
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IdToServerMap m_servers_by_id; /**< Map from server id:s to MariaDBServer */
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int64_t m_master_gtid_domain; /**< gtid_domain_id most recently seen on the master */
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std::string m_external_master_host; /**< External master host, for fail/switchover */
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int m_external_master_port; /**< External master port */
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bool m_cluster_modified; /**< Has an automatic failover/rejoin been performed this loop? */
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// Replication topology detection settings
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bool m_allow_cluster_recovery; /**< Allow failed servers to rejoin the cluster */
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bool m_detect_replication_lag; /**< Monitor flag for MySQL replication heartbeat */
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bool m_detect_multimaster; /**< Detect and handle multi-master topologies */
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bool m_detect_stale_master; /**< Monitor flag for MySQL replication Stale Master detection */
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bool m_detect_stale_slave; /**< Monitor flag for MySQL replication Stale Slave detection */
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bool m_detect_standalone_master; /**< If standalone master are detected */
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bool m_ignore_external_masters; /**< Ignore masters outside of the monitor configuration */
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bool m_mysql51_replication; /**< Use MySQL 5.1 replication */
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bool m_allow_cluster_recovery; /**< Allow failed servers to rejoin the cluster */
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bool m_detect_replication_lag; /**< Monitor flag for MySQL replication heartbeat */
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bool m_detect_multimaster; /**< Detect and handle multi-master topologies */
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bool m_detect_stale_master; /**< Monitor flag for MySQL replication Stale Master detection */
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bool m_detect_stale_slave; /**< Monitor flag for MySQL replication Stale Slave detection */
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bool m_detect_standalone_master; /**< If standalone master are detected */
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bool m_ignore_external_masters; /**< Ignore masters outside of the monitor configuration */
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bool m_mysql51_replication; /**< Use MySQL 5.1 replication */
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// Failover, switchover and rejoin settings
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bool m_auto_failover; /**< Is automatic master failover is enabled? */
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bool m_auto_rejoin; /**< Is automatic rejoin enabled? */
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int m_failcount; /**< Numer of cycles master must be down before auto-failover begins */
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std::string m_replication_user; /**< Replication user for CHANGE MASTER TO-commands */
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std::string m_replication_password; /**< Replication password for CHANGE MASTER TO-commands */
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uint32_t m_failover_timeout; /**< Time limit in seconds for master failover */
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uint32_t m_switchover_timeout; /**< Time limit in seconds for master switchover */
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bool m_verify_master_failure; /**< Is master failure is verified via slaves? */
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int m_master_failure_timeout; /**< Master failure verification (via slaves) time in seconds */
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ServerArray m_excluded_servers; /**< Servers banned for master promotion during auto-failover or
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* autoselect switchover. */
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std::string m_promote_sql_file; /**< File with sql commands which are ran to a server being promoted. */
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std::string m_demote_sql_file; /**< File with sql commands which are ran to a server being demoted. */
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bool m_enforce_read_only_slaves; /**< Should the monitor set read-only=1 on any slave servers. */
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bool m_auto_failover; /**< Is automatic master failover is enabled? */
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bool m_auto_rejoin; /**< Is automatic rejoin enabled? */
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int m_failcount; /**< Numer of cycles master must be down before auto-failover begins */
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std::string m_replication_user; /**< Replication user for CHANGE MASTER TO-commands */
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std::string m_replication_password; /**< Replication password for CHANGE MASTER TO-commands */
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uint32_t m_failover_timeout; /**< Time limit in seconds for master failover */
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uint32_t m_switchover_timeout; /**< Time limit in seconds for master switchover */
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bool m_verify_master_failure; /**< Is master failure is verified via slaves? */
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int m_master_failure_timeout; /**< Master failure verification (via slaves) time in seconds */
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ServerArray m_excluded_servers; /**< Servers banned for master promotion during auto-failover or
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* autoselect switchover. */
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std::string m_promote_sql_file; /**< File with sql commands which are ran to a server being promoted. */
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std::string m_demote_sql_file; /**< File with sql commands which are ran to a server being demoted. */
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bool m_enforce_read_only_slaves; /**< Should the monitor set read-only=1 on any slave servers. */
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bool m_switchover_on_low_disk_space; /**< Should the monitor do a switchover on low disk space. */
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// Other settings
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std::string m_script; /**< Script to call when state changes occur on servers */
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uint64_t m_events; /**< enabled events */
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bool m_warn_set_standalone_master; /**< Log a warning when setting standalone master */
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bool m_log_no_master; /**< Should it be logged that there is no master */
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std::string m_script; /**< Script to call when state changes occur on servers */
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uint64_t m_events; /**< enabled events */
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bool m_warn_set_standalone_master; /**< Log a warning when setting standalone master */
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bool m_log_no_master; /**< Should it be logged that there is no master */
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enum slave_down_setting_t
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{
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