Linux之sersync数据实时同步

2018-02-27 08:58:30来源:cnblogs.com作者:潇潇、寒人点击

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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

1、客户端配置

[root@localhost2 ~]# cat /etc/rsyncd.conf ##created by cai at 2018-2-24uid=rsyncgid=rsyncuse chroot = nomax connections = 200timeout = 300pid file = /var/run/rsyncd.pidlock file = /var/run/rsync.locklog file = /var/log/rsyncd.log[data]path = /data/ignore errorsread only = falselist = falsehosts allow = 192.168.181.128:52000/24hosts deny = 0.0.0.0/32auth users = rsync_bodysecrets 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

[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)

[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/sersync2GNU-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

  ***********************************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.bak24,25c24,25<     <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

[root@salt-client01 src]# echo 'export PATH=$PATH:/usr/local/sersync/bin'>>/etc/profile #声明环境变量[root@salt-client01 src]# source /etc/profile[root@salt-client01 src]# sersync2 -r -d -o /usr/local/sersync/conf/confxml.xml  #启动set the system paramexecute:echo 50000000 > /proc/sys/fs/inotify/max_user_watchesexecute:echo 327679 > /proc/sys/fs/inotify/max_queued_eventsparse the command paramoption: -r     rsync all the local files to the remote servers before the sersync workoption: -d     run as a daemonoption: -o     config xml name:  /usr/local/sersync/conf/confxml.xmldaemon thread num: 10parse xml config filehost ip : localhost    host port: 8008daemon start,sersync run behind the consoleuse rsync password-file :user is    rsync_bodypasswordfile is     /etc/rsync.passwordconfig xml parse successplease set /etc/rsyncd.conf max connections=0 Manuallysersync working thread 12  = 1(primary thread) + 1(fail retry thread) + 10(daemon sub threads)Max threads numbers is: 22 = 12(Thread pool nums) + 10(Sub threads)please according your cpu ,use -n param to adjust the cpu rate------------------------------------------rsync the directory recursivly to the remote servers onceworking please wait...execute command: cd /data && rsync -artuz -R --delete ./  --timeout=100 rsync_body@192.168.91.166::data --password-file=/etc/rsync.password >/dev/null 2>&1run the sersync:watch path is: /data  #此时可以看出sersync已经启动成功了#检测脚本[root@salt-client01 log]# pwd/usr/local/sersync/log[root@salt-client01 log]# vim rsync_fail_log.sh[root@salt-client01 log]# chmod +x rsync_fail_log.sh[root@salt-client01 ~]# cat /usr/local/sersync/log/rsync_fail_log.sh#!/bin/bash#Purpose: Check sersync whether it is alive#Author: cai meng zhiSERSYNC="/usr/local/sersync/bin/sersync2"CONF_FILE="/usr/local/sersync/conf/confxml.xml"STATUS=$(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]# lltotal 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]# lltotal 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 3drwxr-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 directoryrm: remove regular file `192.168.91.156.passwd'? y[root@salt-client01 data]# lltotal 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]# lltotal 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

错误一:@ERROR: auth failed on module xxxxxrsync: 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-accessiblecontinuing without password filePassword: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 failedrsync: 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

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