1. 如何判断从库是否运行正常 从库操作 mysql> show slave status/G 查看其输出 mysql> show slave status/G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 127.0.0.71 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000073 Read_Master_Log_Pos: 19007391 Relay_Log_File: mysql-relay-bin.000207 Relay_Log_Pos: 19007536 Relay_Master_Log_File: mysql-bin.000073 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: gamecenter_notice,im_message_gateway,issuecode Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: gamecenter_notice.%,im_message_gateway.%,issuecode.% Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 19007391 Relay_Log_Space: 19007734 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: 这个输出，最关键处就是"Slave_IO_Running: Yes“和“Slave_SQL_Running: Yes”，这两个值全是"Yes"就表明主从复制正常，否则就是有问题。 其次判断Last_IO_Error/Last_SQL_Error: 是否为空，如果出现error reconnecting to master则代表有错 再加之判断从库读取主库Master_Log_File: mysql-bin.000073是否与主库mysql-bin文件一致 主库操作： mysql>show master status; +------------------+----------+------------------------------------------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +------------------+----------+------------------------------------------------+------------------+ | mysql-bin.000073 | 29463504 | gamecenter_notice,im_message_gateway,issuecode | | +------------------+----------+------------------------------------------------+------------------+ 最后判断，同步的数据库是否完整。Replicate_Do_DB: gamecenter_notice,im_message_gateway,issuecode 与主库show master status;的Binlog_Do_DB一致 2. 实现 > 给予运行监控脚本的机器分配SUPER或者REPLICATION CLIENT权限查看信息 在主从库设置： grant REPLICATION CLIENT on *.* to 'user'@'127.0.0.69' IDENTIFIED BY "pass"; 在69上操作： is_slave=($(/usr/bin/mysql -uuser -ppass -h127.0.0.72 -e "show slave status/G"|grep Running |awk '{print $2}')) if [ "${is_slave[0]}" = "Yes" -a "${is_slave[1]}" = "Yes" ] then echo "OK -slave is running" else echo "Critical -slave is error" #send email php /data/scripts/mailsaveapp/sendMsg.php exit fi #如果返回error代表有错 is_error=($(/usr/bin/mysql -uuser -ppass -h127.0.0.72 -e "show slave status/G"|grep Error |awk '{print $2}')) if [ "${is_error[0]}" = "error" -a "${is_error[1]}" = "error" ] then echo "OK -slave is running" else echo "Critical -slave is error" #send email php /data/scripts/mailsaveapp/sendMsg.php exit fi #取主库的mysql-bin名称 masterBinLog=`/usr/bin/mysql -uuser -ppass -h127.0.0.71 -e "show master status;" |grep -i "mysql-bin" |awk '{print $1}'` #取从库的mysql-bin名称 slaverBinLog=`/usr/bin/mysql -uuser -ppass -h127.0.0.72 -e "show slave status" |grep -i "Waiting for master to send event" |awk '{print $11}'` #判断其是否相等 if [ "$slaverBinLog" != "$masterBinLog" ];then echo "synchronous error" php /data/scripts/mailsaveapp/sendMsg.php exit fi #取主库的Binlog_Do_DB所指定数据库 masterDB=`/usr/bin/mysql -uuser -ppass -h127.0.0.71 -e "show master status;" |grep -i "mysql-bin" |awk '{print $3}'` #取从库的Replicate_Do_DB所指定数据库 slaverDB=`/usr/bin/mysql -uuser -ppass -h127.0.0.72 -e "show slave status/G;" |grep Replicate_Do_DB |awk '{print $2}'` #判断其是否相等 if [ "$slaverDB" != "$masterDB" ];then echo "synchronous error" php /data/scripts/mailsaveapp/sendMsg.php exit fi 代码： #!/bin/bash SENDAPP="/data/scripts/mailsaveapp/sendMsg.php" EXEC="/usr/bin/mysql" PHPEXEC="/usr/bin/php" user="user" pass="pass" masterhost="127.0.0.71" slaverhost="127.0.0.72" for type in 1 2 do echo "type=$type"; if [ "$type" = "1" ];then masterhost="127.0.0.71" slaverhost="127.0.0.72" elif [ "$type" = "2" ];then masterhost="127.0.0.73" slaverhost="127.0.0.75" else echo "$type is not right" exit fi is_slave=($($EXEC -u$user -p$pass -h$slaverhost -e "show slave status/G"|grep Running |awk '{print $2}')) if [ "${is_slave[0]}" = "Yes" -a "${is_slave[1]}" = "Yes" ] then echo $slaverhost" 1: OK -slave is running" else echo $slaverhost"Critical -slave is error" #send email $PHPEXEC $SENDAPP $type exit fi is_error=($($EXEC -u$user -p$pass -h$slaverhost -e "show slave status/G"|grep Error |awk '{print $2}')) if [ "${is_error[0]}" = "error" -a "${is_error[1]}" = "error" ] then echo $slaverhost" Critical -slave is error" #send email $PHPEXEC $SENDAPP $type elif [ "${is_error[2]}" = "error" ];then echo $slaverhost"Critical -slave is error" #send email $PHPEXEC $SENDAPP $type else echo $slaverhost" 2: OK -slave is running" fi #get master mysql-bin postion echo "$EXEC -u$user -p$pass -h$masterhost -e /"show master status;/" |grep -i /"mysql-bin/" |awk '{print /$1}'" masterBinLog=`$EXEC -u$user -p$pass -h$masterhost -e "show master status;" |grep -i "mysql-bin"|awk '{print $1}'` #get slaver mysql-bin postion echo "$EXEC -u$user -p$pass -h$slaverhost -e /"show slave status/" |grep -i /"Waiting for master to send event/" |awk '{print /$11}'" slaverBinLog=`$EXEC -u$user -p$pass -h$slaverhost -e "show slave status" |grep -i "Waiting for master to send event" |awk '{print $11}'` if [ "$slaverBinLog" != "$masterBinLog" ];then echo "synchronous error" $PHPEXEC $SENDAPP $type exit fi echo "$EXEC -u$user -p$pass -h$masterhost -e /"show master status;/" |grep -i /"mysql-bin/" |awk '{print $3}'" masterDB=`$EXEC -u$user -p$pass -h$masterhost -e "show master status;" |grep -i "mysql-bin" |awk '{print $3}'` echo "$EXEC -u$user -p$pass -h$slaverhost -e /"show slave status/G;/" |grep Replicate_Do_DB |awk '{print $2}'" slaverDB=`$EXEC -u$user -p$pass -h$slaverhost -e "show slave status/G;" |grep Replicate_Do_DB |awk '{print $2}'` if [ "$slaverDB" != "$masterDB" ];then echo "synchronous error" $PHPEXEC $SENDAPP $type exit fi done
