shell腳本修復MySQL主從同步 發布：thebaby ? 來源：net ? ? 【大?中?小】分享一例shell腳本，用于修改mysql的主從同步問題，有需要的朋友參考下吧。一個可以修改mysql主從同步的shell腳本。

例子：
?

復制代碼代碼示例:#!/bin/sh
#修復mysql主從同步
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
LOGFILE=/data/repair_mysql_sync_`date +%F`.log
SQLCMD1="show slave status"
#查看MySQL是否啟動
retval=`ps aux | grep mysqld | grep -v grep`
if [ "${retval}X" = "X" ]; then
??? echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
??? exit 1
fi
#獲得MySQL從端Relay binlog的路徑
retval=`grep "^relay-log" /etc/my.cnf | grep -v relay-log- | grep '/'`
if [ "${retval}" = "X" ]; then
??? RELAY_BINLOG_PATH=`ps aux | grep -w mysqld | grep -v grep |?awk?'{print $13}' | awk -F '=' '{print $2}'`
else
??? RELAY_BINLOG_PATH=`dirname $(echo ${retval} | awk -F '=' '{print $2}')`
fi
#查找master.info文件，用于定位Binlog信息
MASTER_FILE=`ps aux | grep -w mysqld | grep -v grep | awk '{print $13}' | awk -F '=' '{print $2}'`/master.info
if [ ! -e ${MASTER_FILE} ]; then
?? echo This Server is not MySQL Slave at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
?? exit 1
fi
#獲得當前的同步狀態
IO_STATUS=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Slave_IO_Running:" {print $2}'`
SQL_STATUS=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Slave_SQL_Running:" {print $2}'`
if [[ "${IO_STATUS}" = "Yes" && "${SQL_STATUS}" = "Yes" ]]; then
?? echo Now, The MySQL Replication is synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
?? exit 0
fi
#從master.info文件中，獲得MySQL主端的同步信息
REPLI_INFO=`sed '/^$/d' ${MASTER_FILE} | tail +2 | head -5`
REPLI_BINLOG_FILE=`echo ${REPLI_INFO} | awk '{print $1}'`
REPLI_IPADDR=`echo ${REPLI_INFO} | awk '{print $3}'`
REPLI_USER=`echo ${REPLI_INFO} | awk '{print $4}'`
REPLI_PWD=`echo ${REPLI_INFO} | awk '{print $5}'`
#刪除無用的Relay binlog
rm -rf ${RELAY_BINLOG_PATH}/*-relay-bin.*
#直接從0位置開始同步
SQLCMD2="change master to master_host='${REPLI_IPADDR}', master_user='${REPLI_USER}', master_password='${REPLI_PWD}',"
SQLCMD2="${SQLCMD2} master_log_file='${REPLI_BINLOG_FILE}', master_log_pos=0"
mysql -uroot -e "stop slave;"
mysql -uroot -e "${SQLCMD2};"
mysql -uroot -e "start slave;"
#如果同步的過程中，出現重復記錄導致同步失敗，就跳過
while true
do
?? sleep 2
?? IO_STATUS=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Slave_IO_Running:" {print $2}'`
?? SQL_STATUS=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Slave_SQL_Running:" {print $2}'`
?? BEHIND_STATUS=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Seconds_Behind_Master:" {print $2}'`
?? SLAVE_BINLOG1=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Master_Log_File:" {print $2}'`
?? SLAVE_BINLOG2=`mysql -uroot -e "${SQLCMD1}\G;" | awk '$1=="Relay_Master_Log_File:" {print $2}'`
?? #出現錯誤，就將錯誤信息記錄到日志文件，并跳過錯誤繼續同步
?? if [[ "${IO_STATUS}" != "Yes" || "${SQL_STATUS}" != "Yes" ]]; then
?????? ERRORINFO=`mysql -uroot -e "${SQLCMD1}\G;" | awk -F ': ' '$1=="Last_Error" {print $2}'`
?????? echo "The MySQL synchronous error information: ${ERRORINFO}" >> ${LOGFILE}
?????? mysql -uroot -e "stop slave;"
?????? mysql -uroot -e "set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;"
?????? mysql -uroot -e "start slave;"
?????? #已完成同步，就正常退出
?? elif [[ "${IO_STATUS}" = "Yes" && "${SQL_STATUS}" = "Yes" && "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && ${BEHIND_STATUS} -eq 0 ]]; then
????? echo The MySQL synchronous is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
????? break
?fi
done

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本文地址：http://www.jbxue.com/article/mysql_master_slave_b1dx2f.html posted on 2013-11-11 06:40 snowfly123 閱讀(...) 評論(...) 編輯 收藏

轉載于:https://www.cnblogs.com/linuxnotes/p/3417361.html

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