MySQL的一些功能实用的Linux shell脚本分享
Memcached启动脚本 # vim /etc/init.d/memcached #!/bin/bash#=======================================================================================# chkconfig: - 80 12# description: Distributed memory caching daemon# processname: memcache
<p>Memcached启动脚本</p>- 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 自动清理脚本
- vim /data/scripts/delete_mysql_binlog.sh
#!/bin/bash #=======================================================================================
- 用于删除 MySQL Master 端已经同步完的 binlog【需在 Master 端运行】，以减少磁盘空间
- 每天凌晨 5:30 分运行一次
-
- 注：需在 Slave 端添加允许 Master 端访问的帐号【帐号：check_binlog，密码：binlog_2356】
- 运行于 MySQL Master 端【目前只用于一主一从的同步模式，对于多从的情况暂时未考虑】 #======================================================================================= PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
Slave端连接信息
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状态信息查看命令
SQLCMD="show slave status"
#=======================================================================================
检查MySQL是否已经运行
if [[ ps aux | grep mysql[d] | wc -l -eq 0 ]]; then
echo The MySQL is not running at: date +%F" "%H-%M-%S >> ${LOGFILE}
exit 1
fi
测试Slave端的连通性
nohup mysqladmin -h${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 >> ${LOGFILE}
exit 1
fi
检查是否合法的Slave
MASTER_ADDR=mysql -h${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 >> ${LOGFILE}
exit 1
fi
获得Slave端信息，以此来确定是否处于正常同步的情况
IO_STATUS=mysql -h${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 >> ${LOGFILE}
exit 1
fi
再做一次判断，以保证数据同步绝对正常【创建测试数据】
mysql -uroot -e "create database if not exists mytestdb;" sleep 3
retval=mysql -h${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 >> ${LOGFILE}
exit 1
fi
在已经同步的情况，还需要判断当前同步的binlog，以此来确定哪些已经是过期的binlog
SLAVE_BINLOG1=mysql -h${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}'
获得Master端，当前的binlog文件以及binlog路径
MASTER_BINLOG=mysql -uroot -e "show master status;" | grep -v '^+' | tail -1 | awk '{print $1}'
主从端已经同步到相同的binlog
if [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${MASTER_BINLOG}"
主从端已经同步，但从端的binlog还没有追赶到主端最新的binlog
elif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" != "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${SLAVE_BINLOG1}"
主从端已经同步，主从端的binlog一致，但relaylog还不一致
elif [[ "${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
修复MySQL主从同步
#!/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
LOGFILE=/data/repair_mysqlsyncdate +%F.log
SQLCMD1="show slave status"
查看MySQL是否已启动
if [[ ps aux | grep mysqld | grep -v grep"X" = "X" ]]; then
echo The MySQL is not running at: date +%F" "%H-%M-%S >> ${LOGFILE}
exit 1
fi
获得MySQL从端Relay binlog的路径
retval=grep "^relay-log" /etc/my.cnf | grep -v relay-log- | grep '/'
if [[ "${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 >> ${LOGFILE}
exit 1
fi
获得当前的同步状态
IO_STATUS=mysql -uroot -e "${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 >> ${LOGFILE}
exit 0
fi
从master.info文件中，获得MySQL主端的同步信息
REPLI_INFO=sed '/^$/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}'
删除无用的Relay binlog
rm -rf ${RELAY_BINLOG_PATH}/-relay-bin.
直接从0位置开始同步
SQLCMD2="change master to master_host='${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 "${SQLCMD2};" mysql -uroot -e "start slave;"
如果同步的过程中，出现重复记录导致同步失败，就跳过
while true
do
sleep 2
IO_STATUS=mysql -uroot -e "${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 $2}'
出现错误，就将错误信息记录到日志文件，并跳过错误继续同步
if [[ "${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
