sersync實現數據實時同步

1.1 第一個里程碑:安裝sersync軟件

1.1.1 將軟件上傳到服務器當中並解壓

1、上傳軟件到服務器上 rz -Ephp

爲了便於管理上傳位置統一設置爲 /server/tools mysql

2、解壓軟件包sql

[root@backup sersync_installdir_64bit]# tree
.
└── sersync
    ├── bin
    │   └── sersync
    ├── conf
    │   └── confxml.xml
    └── logs

1.1.2 二進制包安裝方法

二進制包安裝軟件方法(綠色軟件安裝方法):mongodb

 直接解壓就能夠使用shell

[root@nfs01 sersync_installdir_64bit]# mv sersync/ /usr/local/
[root@nfs01 tools]# tree /usr/local/sersync/
  /usr/local/sersync/
  ├── bin
  │   └── sersync
  ├── conf
  │   └── confxml.xml
  └── logs
  
  3 directories, 2 files

1.2 第二個里程碑:編寫sersync配置文件

1.2.1 常見的語法格式

rsync 配置文件編寫:ini語法express

sersync配置文件編寫:xml語法centos

ansible配置文件編寫:yml 語法緩存

1.2.2 修改配置文件

編寫前備份服務器

[root@backup conf]# ll
total 4
-rw-r--r-- 1 root root 2214 Oct 26  2011 confxml.xml
[root@backup conf]# cp confxml.xml{,.bak}

6-11行表示排除同步的數據,等價於 --exclude 功能,表示排除併發

<filter start="false">
        <exclude expression="(.*)\.svn"></exclude>
        <exclude expression="(.*)\.gz"></exclude>
        <exclude expression="^info/*"></exclude>
         <exclude expression="^static/*"></exclude>
</filter>

12-21行是利用inotify的功能監控指定的事件,等價與 -e createdelete…… 表示指定監控事件信息

 <inotify>
     <delete start="true"/>
     <createFolder start="true"/>
     <createFile start="false"/>
     <closeWrite start="true"/>
     <moveFrom start="true"/>
     <moveTo start="true"/>
     <attrib start="false"/>
     <modify start="false"/>
 </inotify>

24-28行:推送到哪裏 name=模塊 rsync服務器的地址

 <localpath watch="/data"> #監控那個目錄
     <remote ip="172.16.1.41" name="backup"/>
     <!--<remote ip="192.168.8.39" name="tongbu"/>-->
     <!--<remote ip="192.168.8.40" name="tongbu"/>-->
 </localpath>

29-35 定義rsync推送時的參數信息。

注意:不要有單詞拼寫錯誤 true),不然程序不能正常啓動,卡死

<rsync>
    <commonParams params="-az"/>
    <auth start="true" users="rsync_backup" passwordfile="/etc/rsync.password"/>
    <userDefinedPort start="false" port="874"/><!-- port=874 -->
    <timeout start="false" time="100"/><!-- timeout=100 -->
    <ssh start="false"/>
</rsync>

配置文件最終內容:

 

 1 [root@nfs01 tools]# cat /usr/local/sersync/conf/confxml.xml 
 2  <?xml version="1.0" encoding="ISO-8859-1"?>
 3  <head version="2.5">
 4     <host hostip="localhost" port="8008"></host>
 5     <debug start="false"/>
 6     <fileSystem xfs="false"/>
 7     <filter start="false">
 8     <exclude expression="(.*)\.svn"></exclude>
 9     <exclude expression="(.*)\.gz"></exclude>
10     <exclude expression="^info/*"></exclude>
11     <exclude expression="^static/*"></exclude>
12     </filter>
13     <inotify>
14     <delete start="true"/>
15     <createFolder start="true"/>
16     <createFile start="false"/>
17     <closeWrite start="true"/>
18     <moveFrom start="true"/>
19     <moveTo start="true"/>
20     <attrib start="false"/>
21     <modify start="false"/>
22     </inotify>
23 
24     <sersync>
25     <localpath watch="/data">
26         <remote ip="172.16.1.41" name="nfsbackup"/>
27         <!--<remote ip="192.168.8.39" name="tongbu"/>-->
28         <!--<remote ip="192.168.8.40" name="tongbu"/>-->
29     </localpath>
30     <rsync>
31         <commonParams params="-az"/>
32         <auth start="true" users="rsync_backup" passwordfile="/etc/rsync.password"/>
33         <userDefinedPort start="false" port="874"/><!-- port=874 -->
34         <timeout start="false" time="100"/><!-- timeout=100 -->
35         <ssh start="false"/>
36     </rsync>
37     <failLog path="/tmp/rsync_fail_log.sh" timeToExecute="60"/><!--default every 60mins execute once-->
38     <crontab start="false" schedule="600"><!--600mins-->
39         <crontabfilter start="false">
40         <exclude expression="*.php"></exclude>
41         <exclude expression="info/*"></exclude>
42         </crontabfilter>
43     </crontab>
44     <plugin start="false" name="command"/>
45     </sersync>
46 
47     <plugin name="command">
48     <param prefix="/bin/sh" suffix="" ignoreError="true"/>    <!--prefix /opt/tongbu/mmm.sh suffix-->
49     <filter start="false">
50         <include expression="(.*)\.php"/>
51         <include expression="(.*)\.sh"/>
52     </filter>
53     </plugin>
54 
55     <plugin name="socket">
56     <localpath watch="/opt/tongbu">
57         <deshost ip="192.168.138.20" port="8009"/>
58     </localpath>
59     </plugin>
60     <plugin name="refreshCDN">
61     <localpath watch="/data0/htdocs/cms.xoyo.com/site/">
62         <cdninfo domainname="ccms.chinacache.com" port="80" username="xxxx" passwd="xxxx"/>
63         <sendurl base="http://pic.xoyo.com/cms"/>
64         <regexurl regex="false" match="cms.xoyo.com/site([/a-zA-Z0-9]*).xoyo.com/images"/>
65     </localpath>
66     </plugin>
67 </head>
View Code 配置文件最終內容

 

1.3 第三里程碑: 啓動sersync

1.3.1 修改文件的權限(可執行)

首先讓程序讓文件有執行權限

[root@nfs01 bin]# chmod a+x sersync 
[root@nfs01 bin]# ll
total 1768
-rwxr-xr-x 1 root root 1810128 Oct 26  2011 sersync

1.3.2 查看軟件的幫助信息

[root@nfs01 bin]# ./sersync -h
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
_______________________________________________________
重要參數-d:啓用守護進程模式
重要參數-r:在監控前,將監控目錄與遠程主機用rsync命令推送一遍
    參數-n: 指定開啓守護線程的數量,默認爲10個
重要參數-o:指定配置文件,默認使用confxml.xml文件
    參數-m:單獨啓用其餘模塊,使用 -m refreshCDN 開啓刷新CDN模塊
    參數-m:單獨啓用其餘模塊,使用 -m socket 開啓socket模塊
    參數-m:單獨啓用其餘模塊,使用 -m http 開啓http模塊
不加-m參數,則默認執行同步程序
________________________________________________________________

1.3.3 在程序的bin目錄下啓動程序

./sersync -dro /usr/local/sersync/conf/confxml.xml

1.3.4 啓動方法二

/usr/local/sersync/bin/程序的bin目錄添加到PATH

export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/sersync/bin/

而後sersync命令就能直接使用

[root@nfs01 scripts]# sersync -dro /usr/local/sersync/conf/confxml.xml 
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: -d     run as a daemon
option: -r     rsync all the local files to the remote servers before the sersync work
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_backup
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 -az -R --delete ./ rsync_backup@172.16.1.41::nfsbackup --password-file=/etc/rsync.password >/dev/null 2>&1 
run the sersync: 
watch path is: /data

1.4 Inotify sersync總結對比

1.4.1 Inotify實時併發:

  結論:通過測試,每秒200文件併發,數據同步幾乎無延遲(小於1秒)

1.4.2 inotify 優勢:

  1)監控文件系統事件變化,經過同步工具實現實時數據同步。

1.4.3 inotify 缺點

  1)併發若是大於200個文件(10-100k),同步就會有延遲

  2)咱們前面寫的腳本,每次都是所有推送一次,但確實是增量的。也能夠只同步變化的文件,不變化的不理。

  3)監控到事件後,調用rsync同步是單進程的,而sersync爲多進程同步。既然有了inotify-tools,爲何還要開發sersync

1.4.4 serysync功能多:(inotify+rsync命令)

  1)支持經過配置文件管理

  2)真正的守護進程socket

  3)能夠對失敗文件定時重傳(定時任務功能)

  4)第三方的HTTP接口(例如:更新cdn緩存)

  5)默認多進程rsync同步

1.4.5 高併發數據實時同步方案小結:

  1inotifysersync+ rsync,是文件級別的。

  2drbd文件系統級別,文件系統級別,基於block塊同步,缺點:備節點數據不可用

  3)第三方軟件的同步功能:mysql同步(主從複製),oraclemongodb

  4)程序雙寫,直接寫兩臺服務器。

  5)利用產品業務邏輯解決(讀寫分離,備份讀不到,讀主)

2.1 man命令的級別

centos6

[root@nfs01 ~]# man man
       The standard sections of the manual include:

       1      User Commands                                 #用戶命令

       2      System Calls                                  #系統調用

       3      C Library Functions                          # Ç庫函數
 
       4      Devices and Special Files                   #設備和特殊文件

       5      File Formats and Conventions                #文件格式和約定

       6      Games et. Al.                                  #遊戲等。

       7      Miscellanea                                     #雜記

       8      System Administration tools and Daemons   #系統管理工具和程序

       Distributions  customize  the  manual section to their specifics,
       which often include additional sections.

centos7

[root@clsn tuichu]# man ~
1   Executable programs or shell commands
2   System calls (functions provided by the kernel)
3   Library calls (functions within program libraries)
4   Special files (usually found in /dev)
5   File formats and conventions eg /etc/passwd
6   Games
7   Miscellaneous  (including  macro  packages  and conventions), e.g.
    man(7), groff(7)
8   System administration commands (usually only for root)
9   Kernel routines [Non standard]
相關文章
相關標籤/搜索