Memcached啟動腳本

# 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 自動清理腳本

# vim /data/scripts/delete_mysql_binlog.sh

#!/bin/bash

#=======================================================================================

# 用于刪除 MySQL Master 端已經同步完的 binlog【需在 Master 端運行】，以減少磁盤空間

# 每天凌晨 5:30 分運行一次

#

# 注：需在 Slave 端添加允許 Master 端訪問的帳號【帳號：check_binlog，密碼：binlog_2356】

# 運行于 MySQL Master 端【目前只用于一主一從的同步模式，對于多從的情況暫時未考慮】

#=======================================================================================

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狀態信息查看命令

SQLCMD="show slave status"

#=======================================================================================

## 檢查MySQL是否已經運行

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，以保證數據同步絕對正常【創建測試數據】

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

## 在已經同步的情況，還需要判斷當前同步的binlog，以此來確定哪些已經是過期的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}"

## 主從端已經同步，但從端的binlog還沒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

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

總結

以上是生活随笔為你收集整理的mysql 脚本 linux_MySQL的一些功能实用的Linux shell脚本分享的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。