Rsync+Inotify 搭建实时同步数据

1.安装软件包

# yum install inotify-tools
#  yum -y install rsync

2.同步机器相互添加信任

[root@host-10-0-100-106 ~]# ssh-keygen  #一路回车
[root@host-10-0-100-106 ~]# ssh-copy-id -i /root/.ssh/
[root@host-10-0-100-106 ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub root@10.0.100.139

3.两台机器上分别放置同步脚本

vim /shell/inotify.sh
#!/bin/bash
watch_dir=/data/wwwroot/www.ikmak.com/data/attachment
push_to=10.0.100.104                           #另一台机器放置修改ip地址
inotifywait -mrq -e delete,close_write,moved_to,moved_from,isdir --timefmt '%Y-%m-%d %H:%M:%S' --format '%w%f:%e:%T' $watch_dir \
--exclude=".*.swp" |\
while read line;do
  # logging some files which has been deleted and moved out
    if echo $line | grep -i -E "delete|moved_from";then
        echo "$line" >> /etc/inotify_away.log
    fi
  # from here, start rsync's function
    rsync -az --delete --exclude="*.swp" --exclude="*.swx" $watch_dir $push_to:/data/wwwroot/www.ikmak.com/data/
    if [ $? -eq 0 ];then
        echo "sent $watch_dir success"
    else
        echo "sent $watch_dir failed"
    fi
done

优化脚本

[root@xuexi tmp]# cat ~/inotify.sh
#!/bin/bash
watch_dir=/www
push_to=172.16.10.5
 
# First to do is initial sync
rsync -az --delete --exclude="*.swp" --exclude="*.swx" $watch_dir $push_to:/tmp
 
inotifywait -mrq -e delete,close_write,moved_to,moved_from,isdir --timefmt '%Y-%m-%d %H:%M:%S' --format '%w%f:%e:%T' $watch_dir \
--exclude=".*.swp" >>/etc/inotifywait.log &
 
while true;do
     if [ -s "/etc/inotifywait.log" ];then
        grep -i -E "delete|moved_from" /etc/inotifywait.log >> /etc/inotify_away.log
        rsync -az --delete --exclude="*.swp" --exclude="*.swx" $watch_dir $push_to:/tmp
        if [ $? -ne 0 ];then
           echo "$watch_dir sync to $push_to failed at `date +"%F %T"`,please check it by manual" |\
           mail -s "inotify+Rsync error has occurred" root@localhost
        fi
        cat /dev/null > /etc/inotifywait.log
        rsync -az --delete --exclude="*.swp" --exclude="*.swx" $watch_dir $push_to:/tmp
    else
        sleep 1
    fi
done

4.配置后台执行脚本

# nohup /shell/inotify.sh &
# crontab -e
* * * * * nohup /shell/inotify.sh > /dev/null 2>&1 &