MySQL的一些功能實(shí)用的Linux shell腳本分享
更新時(shí)間：2015年12月15日 15:31:07 作者：workming
這篇文章主要介紹了Linux系統(tǒng)下MySQL的一些實(shí)用功能的shell腳本分享,包括啟動(dòng)Memcached、binlog自動(dòng)清理和修復(fù)主從同步這樣三個(gè)簡(jiǎn)單的實(shí)例,需要的朋友可以參考下
Memcached啟動(dòng)腳本
# vim /etc/init.d/memcached
#!/bin/bash
#=======================================================================================
# chkconfig: - 80 12
# description: Distributed memory caching daemon
# processname: memcached
#=======================================================================================
IPADDR=`/sbin/ifconfig eth1 | awk -F ':' '/inet addr/{print $2}' | sed 's/[a-zA-Z ]//g'`
PORT="11211"
USER="root"
SIZE="2048"
CONNNUM="51200"
PIDFILE="/var/run/memcached.pid"
BINFILE="/usr/local/memcached/bin/memcached"
LOCKFILE="/var/lock/subsys/memcached"
RETVAL=0
start() {
echo -n $"Starting memcached......"
$BINFILE -d -l $IPADDR -p $PORT -u $USER -m $SIZE -c $CONNNUM -P $PIDFILE
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $LOCKFILE
return $RETVAL
}
stop() {
echo -n $"Shutting down memcached......"
/sbin/killproc $BINFILE
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCKFILE
return $RETVAL
}
restart() {
stop
sleep 1
start
}
reload() {
echo -n $"Reloading memcached......"
/sbin/killproc $BINFILE -HUP
RETVAL=$?
echo
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
condrestart)
[ -e $LOCKFILE ] && restart
RETVAL=$?
;;
reload)
reload
;;
status)
status $prog
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart|condrestart|status}"
RETVAL=1
esac
exit $RETVAL # chmod +x /etc/init.d/memcached # chkconfig --add memcached # chkconfig --level 235 memcached on # service memcached start
binlog 自動(dòng)清理腳本
# vim /data/scripts/delete_mysql_binlog.sh
#!/bin/bash
#=======================================================================================
# 用于刪除 MySQL Master 端已經(jīng)同步完的 binlog【需在 Master 端運(yùn)行】，以減少磁盤(pán)空間
# 每天凌晨 5:30 分運(yùn)行一次
#
# 注：需在 Slave 端添加允許 Master 端訪(fǎng)問(wèn)的帳號(hào)【帳號(hào)：check_binlog，密碼：binlog_2356】
# 運(yùn)行于 MySQL Master 端【目前只用于一主一從的同步模式，對(duì)于多從的情況暫時(shí)未考慮】
#=======================================================================================
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
## Slave端連接信息
SLAVE_ADDR="XXX.XXX.XXX.XXX"
SLAVE_USER="check_binlog"
SLAVE_PWD="binlog_2356"
LOGFILE="/data/logs/db_sync_info.log"
PINGFILE="/tmp/mysqlping.log"
## MySQL狀態(tài)信息查看命令
SQLCMD="show slave status"
#=======================================================================================
## 檢查MySQL是否已經(jīng)運(yùn)行
if [[ `ps aux | grep mysql[d] | wc -l` -eq 0 ]]; then
echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
## 測(cè)試Slave端的連通性
nohup mysqladmin -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} ping > ${PINGFILE}
retval=`grep "^error" ${PINGFILE}`
rm -f ${PINGFILE}
if [[ "${retval}X" != "X" ]]; then
echo The MySQL Slave can not be connected at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
## 檢查是否合法的Slave
MASTER_ADDR=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}\G;" | awk '$1=="Master_Host:" {print $2}'`
LOCAL_ADDR=`/sbin/ifconfig eth1 | awk -F ':' '/inet addr/{print $2}' | sed 's/[a-zA-Z ]//g'`
if [[ "${MASTER_ADDR}" != "${LOCAL_ADDR}" ]]; then
echo The MySQL Slave is not lawful at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
## 獲得Slave端信息，以此來(lái)確定是否處于正常同步的情況
IO_STATUS=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}\G;" | awk '$1=="Slave_IO_Running:" {print $2}'`
SQL_STATUS=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}\G;" | awk '$1=="Slave_SQL_Running:" {print $2}'`
if [[ "${IO_STATUS}" != "Yes" || "${SQL_STATUS}" != "Yes" ]]; then
echo The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
## 再做一次判斷，以保證數(shù)據(jù)同步絕對(duì)正常【創(chuàng)建測(cè)試數(shù)據(jù)】
mysql -uroot -e "create database if not exists mytestdb;"
sleep 3
retval=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "show databases;" | grep mytestdb`
mysql -uroot -e "drop database if exists mytestdb;"
if [[ "${retval}X" = "X" ]]; then
echo The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
## 在已經(jīng)同步的情況，還需要判斷當(dāng)前同步的binlog，以此來(lái)確定哪些已經(jīng)是過(guò)期的binlog
SLAVE_BINLOG1=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}\G;" | awk '$1=="Master_Log_File:" {print $2}'`
SLAVE_BINLOG2=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}\G;" | awk '$1=="Relay_Master_Log_File:" {print $2}'`
## 獲得Master端，當(dāng)前的binlog文件以及binlog路徑
MASTER_BINLOG=`mysql -uroot -e "show master status;" | grep -v '^+' | tail -1 | awk '{print $1}'`
## 主從端已經(jīng)同步到相同的binlog
if [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then
CURR_BINLOG="${MASTER_BINLOG}"
## 主從端已經(jīng)同步，但從端的binlog還沒(méi)有追趕到主端最新的binlog
elif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" != "${MASTER_BINLOG}" ]]; then
CURR_BINLOG="${SLAVE_BINLOG1}"
## 主從端已經(jīng)同步，主從端的binlog一致，但relaylog還不一致
elif [[ "${SLAVE_BINLOG1}" != "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then
CURR_BINLOG="${SLAVE_BINLOG2}"
else
echo Has noknown error at：`date +%F" "%H-%M-%S` >> ${LOGFILE}
exit 1
fi
mysql -uroot -e "purge binary logs to '${CURR_BINLOG}';"
if [[ $? -eq 0 ]]; then
echo Clear MySQL binlog is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE}
fi
# crontab -e 30 05 * * * /data/scripts/delete_mysql_binlog.sh >/dev/null 2>&1
修復(fù)MySQL主從同步
#!/bin/sh
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是否已啟動(dòng)
if [[ `ps aux | grep mysqld | grep -v grep`"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` >> ${LOGFILE}
exit 1
fi
## 獲得當(dāng)前的同步狀態(tài)
IO_STATUS=`mysql -uroot -e "${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(wú)用的Relay binlog
rm -rf ${RELAY_BINLOG_PATH}/*-relay-bin.*
## 直接從0位置開(kāi)始同步
SQLCMD2="change master to master_host='${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 "${SQLCMD2};"
mysql -uroot -e "start slave;"
## 如果同步的過(guò)程中，出現(xiàn)重復(fù)記錄導(dǎo)致同步失敗，就跳過(guò)
while true
do
sleep 2
IO_STATUS=`mysql -uroot -e "${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 $2}'`
## 出現(xiàn)錯(cuò)誤，就將錯(cuò)誤信息記錄到日志文件，并跳過(guò)錯(cuò)誤繼續(xù)同步
if [[ "${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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