889bdd4f8c
dcb.h: define ERRHAND temporarily since changes are still behind that macro Defined two error handling actions in router.h: ERRACT_NEW_COMMECTION and ERRACT_REPLY_CLIENT. Failed database is logged at expanding frequence to error and to message log due changes in mysql_mon.c. Added two new members in MONITOR_SERVERS: mon_err_count, and mon_prev_status so that each backend can be treated individually. Error handling: if mysql_backend.c:dcb_read fails, router's handleError is called instead of closing session. If mysql_client.c:SESSION_ROUTE_QUERY fails router's handleError is called instead of sending error to client. readwritesplit.c:select_connect_backend_servers is modified so that in can be called during active router session. When called, it attempts to find one master and maximum number of configured slaves in correct state if necessary. When handleError needs to replace failed unit it now calls select_connect_backend_servers.
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
#ifndef _MYSQLMON_H
|
|
#define _MYSQLMON_H
|
|
/*
|
|
* This file is distributed as part of the SkySQL Gateway. It 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,
|
|
* version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc., 51
|
|
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Copyright SkySQL Ab 2013
|
|
*/
|
|
#include <server.h>
|
|
#include <spinlock.h>
|
|
#include <mysql.h>
|
|
|
|
/**
|
|
* @file mysqlmon.h - The MySQL monitor functionality within the gateway
|
|
*
|
|
* @verbatim
|
|
* Revision History
|
|
*
|
|
* Date Who Description
|
|
* 08/07/13 Mark Riddoch Initial implementation
|
|
* 26/05/14 Massimiliano Pinto Default values for MONITOR_INTERVAL
|
|
* 28/05/14 Massimiliano Pinto Addition of new fields in MYSQL_MONITOR struct
|
|
*
|
|
* @endverbatim
|
|
*/
|
|
|
|
/**
|
|
* The linked list of servers that are being monitored by the MySQL
|
|
* Monitor module.
|
|
*/
|
|
typedef struct monitor_servers {
|
|
SERVER *server; /**< The server being monitored */
|
|
MYSQL *con; /**< The MySQL connection */
|
|
int mon_err_count;
|
|
unsigned int mon_prev_status;
|
|
struct monitor_servers
|
|
*next; /**< The next server in the list */
|
|
} MONITOR_SERVERS;
|
|
|
|
/**
|
|
* The handle for an instance of a MySQL Monitor module
|
|
*/
|
|
typedef struct {
|
|
SPINLOCK lock; /**< The monitor spinlock */
|
|
pthread_t tid; /**< id of monitor thread */
|
|
int shutdown; /**< Flag to shutdown the monitor thread */
|
|
int status; /**< Monitor status */
|
|
char *defaultUser; /**< Default username for monitoring */
|
|
char *defaultPasswd; /**< Default password for monitoring */
|
|
unsigned long interval; /**< Monitor sampling interval */
|
|
unsigned long id; /**< Monitor ID */
|
|
int replicationHeartbeat; /**< Monitor flag for MySQL replication heartbeat */
|
|
int master_id; /**< Master server-id for MySQL Master/Slave replication */
|
|
MONITOR_SERVERS *databases; /**< Linked list of servers to monitor */
|
|
} MYSQL_MONITOR;
|
|
|
|
#define MONITOR_RUNNING 1
|
|
#define MONITOR_STOPPING 2
|
|
#define MONITOR_STOPPED 3
|
|
|
|
#define MONITOR_INTERVAL 10000 // in milliseconds
|
|
#define MONITOR_DEFAULT_ID 1UL // unsigned long value
|
|
|
|
#endif
|