Mysql運(yùn)行很長時(shí)間以后會(huì)導(dǎo)致二進(jìn)制很大或者很多，需要定期備份清理。

二進(jìn)制日志清理：
mysql提供expire-logs-days變量用以清理過期日志。
默認(rèn)為0表示不清理，最大值為99天。
可以在my.cnf添加： 表示刪除5天以前的二進(jìn)制日志
expire-logs-days = 5
set global expire_logs_days=5; //全局會(huì)話設(shè)置日志過期時(shí)間
# 日志查看
show binary logs;
show master logs;
flush logs; //二進(jìn)制日志滾動(dòng)
reset master; //重置二進(jìn)制日志，

二進(jìn)制日志備份：
通過nfs自動(dòng)備份至其他Server
安裝NFS：客戶端需要安裝，否則客戶端在mount時(shí)，指定nfs掛載失敗。

Centos6服務(wù)端:
yum install -y nfs-utils rpcbind
vi /etc/exports
  /data/binlog_backup 192.168.3.6(rw,sync,no_root_squash)  *(ro)

客戶端：
mount -t nfs 192.168.10.27:/data/binlog_backup /data/binlog_backup
# 將此掛載命令寫入：/etc/rc.d/rc.local

備份腳本：參考博客http://blog.chinaunix.net/uid-20639775-id-3209044.html

#!/bin/bash
#Date:2017-05-09

USER=root
PASS=123456
HOST=localhost
MYSQL="/usr/local/mysql/bin/mysql"

# binlog
BINLOG=`grep "log-bin=" /etc/my.cnf | grep -v "^#" | awk -F"=" '{print $2}'`
BIN_LOG_DIR=`dirname $BINLOG`
BIN_LOG_FILE=`basename $BINLOG`

# binlog backup dir
BIN_LOG_BACKUP_DIR="/data/binlog_backup"
BACKUPFILE="$BIN_LOG_BACKUP_DIR/backup.file"
LOGFILE="$BIN_LOG_BACKUP_DIR/binlog_backup.log"
[ ! -d "$BIN_LOG_BACKUP_DIR" ] && mkdir -p $BIN_LOG_BACKUP_DIR
[ ! -f "$LOGFILE" ] && touch "$LOGFILE"
[ ! -f "$BACKUPFILE" ] && touch "$BACKUPFILE"

# flush logs
$MYSQL -u$USER -h$HOST -p$PASS -e "flush logs"

# backup file list 
FILE_LIST=`comm -23 $BINLOG.index $BACKUPFILE`  #沒有備份的二進(jìn)制文件列表
FILE_COUNT=`comm -23 $BINLOG.index $BACKUPFILE|wc -l`   #執(zhí)行此腳本時(shí)，F(xiàn)ILE_COUNT一定是大于或者等于1
COUNT=0    

# running binlog backup
for file in $FILE_LIST;do
    BINLOG_FILE=`basename $file`
    let COUNT=$COUNT+1    
    if [ $COUNT -eq $FILE_COUNT ];then    #跳過mysql當(dāng)前正在使用的二進(jìn)制日志
        echo "skip the lastest binlog file" >> $LOGFILE
    else
    cp $BIN_LOG_DIR/$BINLOG_FILE $BIN_LOG_BACKUP_DIR/
    if [ $? -eq 0 ];then
        echo "`date -d "today" +%Y-%m-%d-%H-%M-%S` $BINLOG_FILE backup success" >> $LOGFILE
    else 
        echo "`date -d "today" +%Y-%m-%d-%H-%M-%S` $BINLOG_FILE backup faild,please check it out" >> $LOGFILE
            exit 5
    fi
    # gzip
    gzip $BIN_LOG_BACKUP_DIR/$BINLOG_FILE
    if [ $? -eq 0 ];then
        echo "`date -d "today" +%Y-%m-%d-%H-%M-%S` $BINLOG_FILE gzip success" >> $LOGFILE
    else
        echo "`date -d "today" +%Y-%m-%d-%H-%M-%S` $BINLOG_FILE gzip faild,please check it out" >> $LOGFILE
        exit 6
    fi
    echo $file >> $BACKUPFILE
    fi
done