share一个自动跳mysql从库上1062错误的脚本

  从库突然掉电可能会导致log里的信息没flush到硬盘，于是从库启动之后主从会因为1062(主键重复）而卡住，这里提供一个自动跳1062的脚本

#!/bin/sh

MYSQL=mysql

lastPos=0
while [ 1 ]; do
        $MYSQL -uroot -e "show slave status\G" > /tmp/.skip
        lastError=`cat /tmp/.skip|grep "Last_SQL_Errno"|awk '{print $2}'`
        nowPos=`cat /tmp/.skip|grep "Exec_Master_Log_Pos"|awk '{print $2}'`
        if [ $lastError -eq 1062 ]; then
                if [ $lastPos -ne $nowPos ]; then
                        echo "blocked, skip one"
                        $MYSQL -uroot -e "slave stop; set global sql_slave_skip_counter =1; slave start;"
                        lastPos=$nowPos
                else
                        echo "sleep one second"
                        sleep 1
                fi
        elif [ $lastError -eq 0 ]; then
                secondsBehind=`cat /tmp/.skip|grep "Seconds_Behind_Master"|awk '{print $2}'`
                if [ $secondsBehind -eq 0 ]; then
                        echo "done"
                        break
                else
                        echo "$secondsBehind seconds behind server"
                        sleep 3
                fi
        else
                echo "error $lastError found"
                break
        fi
done