rsync结合inotify实现实时同步
rysnc备份服务结合inotify
搭建
服务器端
1.首先关闭selinux，iptables
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setenfore 0
systemctl stop firewalld
上面是临时关闭，永久关闭如下：
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sed -ir 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
source /etc/selinux/config
systemctl disable firewalld
2.编辑 /etc/rsyncd.conf文件
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uid = rsync
gid = rsync
use chroot = no
max connections = 100
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsyncd.lock
log file = /var/log/rsyncd.log
[backup]
path = /var/backup
comment = rsync backup directory
ignore errors
read only = no
hosts allow = *
list = false
auth users = rsync_backup
secrets file = /etc/rsync.passwd
3.创建密码文件并修改权限
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[root@controller ~]# vim /etc/rsync.passwd
rysnc_backup:123456
[root@controller ~]# chmod 600 /etc/rsync.passwd
4.创建备份目录，并修改权限
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[root@controller ~]# mkdir /var/backup
[root@controller ~]# chown rsync.rsync /var/backup
5.重启服务即可
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systemctl restart rsyncd
客户端
1.配置密码文件/etc/rsync.passwd
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[root@node1 ~]# vim /etc/rsync.passwd
123456
2.推送文件到服务器
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[root@node1 ~]# rsync -avz test.txt rsync://rsync_backup@192.168.139.105/backup --password-file=/etc/rsync.passwd
#或者
[root@node1 ~]# rsync -avz test.txt rsync_backup@192.168.139.105::backup --password-file=/etc/rsync.passwd
#将以上命令写进cron定时任务实现定时备份
结合inotify实现实时同步
1.安装inotify工具
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yum -y install inotify-tools
2.选项说明
- -m 持续监控
- -r 递归
- -q 静默，仅打印时间信息
- –timefmt 指定输出时间格式
- –format 指定事件输出格式
%Xe 事件
%w 目录
%f 文件 - -e 指定监控的事件
access 访问
modify 内容修改
attrib 属性修改
close_write 修改真实文件内容
open 打开
create 创建
delete 删除
umount 卸载 - inotify监控效果如下
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[root@node1 ~]# /usr/bin/inotifywait -mrq --format '%Xe %w %f' -e create,modify,delete,attrib,close_write /tmp
MODIFY /tmp/ test
CLOSE_WRITEXCLOSE /tmp/ test
ATTRIB /tmp/ test
rsync+inotify 脚本
简洁版
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[root@node1 ~]# vim rsyn-inotify.sh
[root@node1 ~]# cat rsyn-inotify.sh
#!/bin/bash
dir=/tmp/backup
/usr/bin/inotifywait -mrq --format '%w %f' -e create,delete,attrib,close_write $dir | while read line;do
cd $dir && rsync -az -R --delete . rsync_backup@192.168.139.105::backup --password-file=/etc/rsync.passwd >/dev/null 2>&1
done &
优化版：
#!/bin/bash
src=/tmp/backup # 需要同步的源路径
des=backup # 目标服务器上 rsync --daemon 发布的名称，rsync --daemon这里就不做介绍了，网上搜一下，比较简单。
rsync_passwd_file=/etc/rsyncd.passwd # rsync验证的密码文件
ip1=192.168.139.105 # 目标服务器1
#ip2=192.168.0.19 # 目标服务器2
user=rsync_backup # rsync --daemon定义的验证用户名
cd ${src} # 此方法中，由于rsync同步的特性，这里必须要先cd到源目录，inotify再监听 ./ 才能rsync同步后目录结构一致，有兴趣的同学可以进行各种尝试观看其效果
/usr/bin/inotifywait -mrq --format '%Xe %w%f' -e modify,create,delete,attrib,close_write,move ./ | while read file # 把监控到有发生更改的"文件路径列表"循环
do
INO_EVENT=$(echo $file | awk '{print $1}') # 把inotify输出切割 把事件类型部分赋值给INO_EVENT
INO_FILE=$(echo $file | awk '{print $2}') # 把inotify输出切割 把文件路径部分赋值给INO_FILE
# echo "-------------------------------$(date)------------------------------------"
# echo $file
#增加、修改、写入完成、移动进事件
#增、改放在同一个判断，因为他们都肯定是针对文件的操作，即使是新建目录，要同步的也只是一个空目录，不会影响速度。
if [[ $INO_EVENT =~ 'CREATE' ]] || [[ $INO_EVENT =~ 'MODIFY' ]] || [[ $INO_EVENT =~ 'CLOSE_WRITE' ]] || [[ $INO_EVENT =~ 'MOVED_TO' ]] # 判断事件类型
then
# echo 'CREATE or MODIFY or CLOSE_WRITE or MOVED_TO'
rsync -azcR --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip1}::${des} >/dev/null 2>&1 #&& # INO_FILE变量代表路径哦 -c校验文件内容
#rsync -avzcR --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip2}::${des}
#仔细看 上面的rsync同步命令 源是用了$(dirname ${INO_FILE})变量 即每次只针对性的同步发生改变的文件的目录(只同步目标文件的方法在生产环境的某些极端环境下会漏文件 现在可以在不漏>文件下也有不错的速度 做到平衡) 然后用-R参数把源的目录结构递归到目标后面 保证目录结构一致性
fi
#删除、移动出事件
if [[ $INO_EVENT =~ 'DELETE' ]] || [[ $INO_EVENT =~ 'MOVED_FROM' ]]
then
# echo 'DELETE or MOVED_FROM'
rsync -azR --delete --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip1}::${des} >/dev/null 2>&1 # &&
# rsync -avzR --delete --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip2}::${des}
#看rsync命令 如果直接同步已删除的路径${INO_FILE}会报no such or directory错误 所以这里同步的源是被删文件或目录的上一级路径，并加上--delete来删除目标上有而源中没有的文件，这里不
能做到指定文件删除，如果删除的路径越靠近根，则同步的目录月多，同步删除的操作就越花时间。
fi
#修改属性事件 指 touch chgrp chmod chown等操作
if [[ $INO_EVENT =~ 'ATTRIB' ]]
then
# echo 'ATTRIB'
if [ ! -d "$INO_FILE" ] # 如果修改属性的是目录 则不同步，因为同步目录会发生递归扫描，等此目录下的文件发生同步时，rsync会顺带更新此目录。
then
rsync -azcR --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip1}::${des} >/dev/null 2>&1 #&&
# rsync -avzcR --password-file=${rsync_passwd_file} $(dirname ${INO_FILE}) ${user}@${ip2}::${des}
fi
fi
done &
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.cm-searching { background: rgba(255, 255, 0, .4) }
.cm-force-border { padding-right: .1px }
.cm-tab-wrap-hack::after { content: “” }
span.CodeMirror-selectedtext { background: none }
.CodeMirror-activeline-background,.CodeMirror-selected { }
.CodeMirror-blur .CodeMirror-activeline-background,.CodeMirror-blur .CodeMirror-selected { visibility: hidden }
.CodeMirror-blur .CodeMirror-matchingbracket { color: inherit !important; outline: none !important; text-decoration: none !important }
.wiz-code-tools { display: none; position: absolute; top: -32px; right: 0; opacity: .95; z-index: 10 }
.CodeMirror-focused .wiz-code-tools { display: block }
.CodeMirror-sizer { border-right: 0 !important }
body pre.prettyprint { padding: 0 }
body pre.prettyprint code { white-space: pre }
body pre.prettyprint.linenums { overflow: auto }
body pre.prettyprint.linenums ol.linenums { padding: 10px 10px 10px 40px !important }
.CodeMirror-cursors { visibility: hidden !important }