今天就跟大家聊聊有关如何进行实时备份mysql binlog日志，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
在要备份binlog服务器（192.168.1.248）
grant REPLICATION SLAVE on *.* ‘repl’@’192.168.1.250’ identified by ‘repl’;
以下操作都是在备份binlog服务器操作（192.168.1.250）
mkdir /backup/binlog
cat backup_binlog.sh
#!/bin/sh
#指定mysqlbinlog的位置
BACKUP_BIN=/usr/local/mysql/bin/mysqlbinlog
#指定将远程binlog备份到本地的位置
LOCAL_BACKUP_DIR=/backup/binlog/
#指定备份binlog时的日志
BACKUP_LOG=/backup/binlog/backup.log
#指定要备份哪台binlog的ip
REMOTE_HOST=192.168.1.248
REMOTE_PORT=3306
REMOTE_USER=repl
REMOTE_PASS=repl
FIRST_BINLOG=mysql-bin.000001
#time to wait before reconnecting after failure
SLEEP_SECONDS=10
##create local_backup_dir if necessary
mkdir -p ${LOCAL_BACKUP_DIR}
cd ${LOCAL_BACKUP_DIR}
## 运行while循环，连接断开后等待指定时间，重新连接
while :
do
if [ `ls -A “${LOCAL_BACKUP_DIR}” |wc -l` -eq 0 ];then
LAST_FILE=${FIRST_BINLOG}
else
LAST_FILE=`ls -l ${LOCAL_BACKUP_DIR} | grep -v backup.log |tail -n 1 |awk ‘{print $9}’`
fi
#${BACKUP_BIN} –raw –read-from-remote-server –stop-never –host=${REMOTE_HOST} –port=${REMOTE_PORT} –user=${REMOTE_USER} –password=${REMOTE_PASS} ${LAST_FILE}
/usr/local/mysql/bin/mysqlbinlog –raw –read-from-remote-server –stop-never –host=${REMOTE_HOST} –port=${REMOTE_PORT} –user=${REMOTE_USER} –password=${REMOTE_PASS} ${LAST_FILE}
echo “`date +”%Y/%m/%d %H:%M:%S”` mysqlbinlog停止，返回代码：$?” | tee -a ${BACKUP_LOG}
echo “${SLEEP_SECONDS}秒后再次连接并继续备份” | tee -a ${BACKUP_LOG}
sleep ${SLEEP_SECONDS}
done
后台运行该备份脚本
nohup sh backup_binlog.sh &
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