Linux下sersync数据实时同步

时间:2022-06-25 16:55:13

sersync其实是利用inotify和rsync两种软件技术来实现数据实时同步功能的,inotify是用于监听sersync所在服务器上的文件变化,结合rsync软件来进行数据同步,将数据实时同步给客户端服务器。

工作过程:在同步主服务器上开启sersync,负责监听文件系统的变化,然后调用rsync命令把更新的文件同步到目标服务器上,主服务器上安装sersync软件,目标服务器上安装rsync服务。

Linux下sersync数据实时同步

1、客户端配置

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[root@localhost2 ~]# cat /etc/rsyncd.conf
##created by cai at 2018-2-24
uid=rsync
gid=rsync
use chroot = no
max connections = 200
timeout = 300
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsync.lock
log file = /var/log/rsyncd.log
[data]
path = /data/
ignore errors
read only = false
list = false
hosts allow = 192.168.181.128:52000/24
hosts deny = 0.0.0.0/32
auth users = rsync_body
secrets file = /etc/rsync.password
[root@localhost2 ~]# ls -ld /data/
drwxrwxrwx. 3 rsync rsync 4096 feb 24 16:58 /data/
 
[root@localhost2 ~]# cat /etc/rsync.password
rsync_body:admin
 
[root@localhost2 ~]# ls -ld /etc/rsync.password
-rw-------. 1 root root 17 feb 24 16:26 /etc/rsync.password  #600权限
 
[root@localhost2 ~]# netstat -lntup| grep "rsync"
tcp 0 0 0.0.0.0:873 0.0.0.0:* listen 1497/rsync
tcp 0 0 :::873 :::* listen 1497/rsync

2、主服务器配置

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[root@localhost1 ~]# cat /etc/rsync.password
admin
[root@localhost1 ~]# ls -ld /etc/rsync.password
-rw------- 1 root root 6 feb 24 03:54 /etc/rsync.password

3、安装sersync服务

采用inotify来对文件进行监控,当监控到文件有文件发生改变的时候,就会调用rsync实现触发式实时同步!

安装sersync(注意sersync是工作在rsync的源服务器上,也就是客户端上)

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[root@salt-client01 ~]# cd /usr/local/src/
[root@salt-client01 src]# tar -zxvf sersync2.5.4_64bit_binary_stable_final.tar.gz -c /usr/local/
gnu-linux-x86/
gnu-linux-x86/sersync2
gnu-linux-x86/confxml.xml
[root@salt-client01 src]# cd /usr/local/
[root@salt-client01 local]# mv gnu-linux-x86 sersync
[root@salt-client01 local]# cd sersync/
[root@salt-client01 sersync]# mkdir conf bin log
[root@salt-client01sersync]# mv confxml.xml conf
[root@salt-client01sersync]# mv sersync2 bin/sersync

修改配置文件

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***********************************30行开始******************************
  <commonparams params="-artuz"/> #-artuz为rsync同步时的参数
  <authstart="true" users="rsync的虚拟用户名(rsync_backup)" passwordfile="rsync的密码文件"/>
  <userdefinedport start="true"port="873"/><!-- port=874 -->
  <timeout start="false" time="100"/><!--timeout=100 -->
  <sshstart="false"/>
    ************************************第36行***********************************
    <faillogpath="自己定义的log文件夹(/usr/local/sersync/log)rsync_fail_log.sh"
    timetoexecute="60"/><!--defaultevery 60mins execute once-->
    *******************************************************************************
    *注:若有多个目录备份可以穿件多个配置文件在启动时的-o参数中添加即可
 
[root@salt-client01 conf]# diff confxml.xml confxml.xml.bak
24,25c24,25
<   <localpath watch="/data/"#data就是本地需要同步的文件夹到服务器端的目录
<     <remote ip="192.168.91.166" name="data"/> #data (server的模块名)是rsync 服务端的文件夹,也就是推送到服务器端的目标文件夹,可以配置多个,
---
>   <localpath watch="/opt/tongbu">
>     <remote ip="127.0.0.1" name="tongbu1"/>
31c31
<     <auth start="true" users="rsync_body" passwordfile="/etc/rsync.password"/>  #true 才能生效,rsync_body同步时候虚拟账号,后面是密码文件
---
>     <auth start="false" users="root" passwordfile="/etc/rsync.pas"/>
33c33
<     <timeout start="true" time="100"/><!-- timeout=100 -->          #true 才能生效
---
>     <timeout start="false" time="100"/><!-- timeout=100 -->
36c36
<   <faillog path="/usr/local/sersync/log/rsync_fail_log.sh" timetoexecute="60"/><!--default every 60mins execute once--> #检测rsync进程判断,没有自动启
---
>   <faillog path="/tmp/rsync_fail_log.sh" timetoexecute="60"/><!--default evepry 60mins execute once-->

启动sersync

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[root@salt-client01 src]# echo 'export path=$path:/usr/local/sersync/bin'>>/etc/profile #声明环境变量
[root@salt-client01 src]# source /etc/profile
[root@salt-client01 src]# sersync2 -r -d -o /usr/local/sersync/conf/confxml.xml #启动
set the system param
execute:echo 50000000 > /proc/sys/fs/inotify/max_user_watches
execute:echo 327679 > /proc/sys/fs/inotify/max_queued_events
parse the command param
option: -r   rsync all the local files to the remote servers before the sersync work
option: -d   run as a daemon
option: -o   config xml name: /usr/local/sersync/conf/confxml.xml
daemon thread num: 10
parse xml config file
host ip : localhost  host port: 8008
daemon start,sersync run behind the console
use rsync password-file :
user is  rsync_body
passwordfile is   /etc/rsync.password
config xml parse success
please set /etc/rsyncd.conf max connections=0 manually
sersync working thread 12 = 1(primary thread) + 1(fail retry thread) + 10(daemon sub threads)
max threads numbers is: 22 = 12(thread pool nums) + 10(sub threads)
please according your cpu ,use -n param to adjust the cpu rate
------------------------------------------
rsync the directory recursivly to the remote servers once
working please wait...
execute command: cd /data && rsync -artuz -r --delete ./ --timeout=100 rsync_body@192.168.91.166::data --password-file=/etc/rsync.password >/dev/null 2>&1
run the sersync:
watch path is: /data #此时可以看出sersync已经启动成功了
 
#检测脚本
[root@salt-client01 log]# pwd
/usr/local/sersync/log
[root@salt-client01 log]# vim rsync_fail_log.sh
[root@salt-client01 log]# chmod +x rsync_fail_log.sh
[root@salt-client01 ~]# cat /usr/local/sersync/log/rsync_fail_log.sh
#!/bin/bash
#purpose: check sersync whether it is alive
#author: cai meng zhi
sersync="/usr/local/sersync/bin/sersync2"
conf_file="/usr/local/sersync/conf/confxml.xml"
status=$(ps aux |grep 'sersync2'|grep -v 'grep'|wc -l)
if [ $status -eq 0 ];
then
    $sersync -d -r -o $conf_file &
else
    exit 0;
fi
脚本写好以后,添加到计划任务中去
*/1 * * * * /bin/bash /usr/local/sersync/log/rsync_fail_log.sh > /dev/null 2>&1
 
测试同步:
客户端新增文件
[root@salt-client01 data]# cp /etc/passwd 192.168.91.156.passwd
[root@salt-client01 data]# ll
total 4
-rw-r--r-- 1 root root 1928 nov 10 18:15 192.168.91.156.passwd
-rw-r--r-- 1 root root  0 nov 10 17:27 3
服务端检测
[root@salt-master data]# cd /data/
[root@salt-master data]# ll
total 8
-rw-r--r-- 1 root root 1928 nov 10 18:15 192.168.91.156.passwd #说明已经同步过来了
-rw-r--r-- 1 root root  0 nov 10 17:27 3
drwxr-xr-x 2 root root 4096 nov 10 17:27 data
 
客户端测试删除
[root@salt-client01 data]# rm rf 192.168.91.156.passwd
rm: cannot remove `rf': no such file or directory
rm: remove regular file `192.168.91.156.passwd'? y
[root@salt-client01 data]# ll
total 0
-rw-r--r-- 1 root root 0 nov 10 17:27 3
[root@salt-client01 data]#
 
服务器端:
[root@salt-master data]# ll
total 4
-rw-r--r-- 1 root root  0 nov 10 17:27 3  #说明已经删除掉了
drwxr-xr-x 2 root root 4096 nov 10 17:27 data

4、常见错误汇总

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错误一:
@error: auth failed on module xxxxx
rsync: connection unexpectedly closed(90 bytes read so far)
rsync error: error in rsync protocoldata stream (code 12) at io.c(150)
说明:这是因为密码设置错了,无法登入成功,检查一下rsync.pwd,看客服是否匹配。还有服务器端没启动rsync 服务也会出现这种情况。
 
错误二:
password file must not beother-accessible
continuing without password file
password:
说明:这是因为rsyncd.pwdrsyncd.sec的权限不对,应该设置为600。如:chmod600 rsyncd.pwd
 
错误三:
@error: chroot failed
rsync: connection unexpectedly closed(75 bytes read so far)
rsync error: error in rsync protocoldata stream (code 12) at io.c(150)
说明:这是因为你在 rsync.conf中设置的 path 路径不存在,要新建目录才能开启同步
 
错误四:
rsync: failed to connect to218.107.243.2: no route to host (113)
rsync error: error in socket io (code10) at clientserver.c(104) [receiver=2.6.9]
说明:防火墙问题导致,这个最好先彻底关闭防火墙,排错的基本法就是这样,无论是s还是c,还有ignore errors选项问题也会导致
 
错误五:
@error: access denied to www fromunknown (192.168.1.123)
rsync: connection unexpectedly closed(0 bytes received so far) [receiver]
rsync error: error in rsync protocoldata stream (code 12) at io.c(359)
说明:此问题很明显,是配置选项hostallow的问题,初学者喜欢一个允许段做成一个配置,然后模块又是同一个,致使导致
 
错误六:
rsync error: received sigint,sigterm, or sighup (code 20) at rsync.c(244) [generator=2.6.9]
rsync error: received sigusr1 (code19) at main.c(1182) [receiver=2.6.9]
说明:导致此问题多半是服务端服务没有被正常启动,到服务器上去查查服务是否有启动,然后查看下 /var/run/rsync.pid 文件是否存在,最干脆的方法是杀死已经启动了服务,然后再次启动服务或者让脚本加入系统启动服务级别然后shutdown -r now服务器
 
错误七:
rsync: read error: connection resetby peer (104)
rsync error: error in rsync protocoldata stream (code 12) at io.c(604) [sender=2.6.9]
说明:原数据目录里没有数据存在

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

原文链接:https://www.cnblogs.com/caicairui/archive/2018/02/26/8472888.html