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Tomcat+Nginx+Memcacheed集群部署

Tomcat+Nginx+Memcacheed集群部署

主机环境 RedHat6.5 64位
实验环境 服务端1 ip172.25.29.1  nginx
服务端2 ip 172.25.29.2    tomcat+memcached
服务端3 ip 172.25.29.3    tomcat+memcaceed
安装包  jdk-7u79-linux-x64.tar.gz
 apache-tomcat-7.0.37.tar.gz
 nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d.tar.gz
 asm-3.2.jar
 kryo-1.04.jar
 kryo-serializers-0.10.jar
 memcached-session-manager-1.6.3.jar
 memcached-session-manager-tc7-1.6.3.jar
 minlog-1.2.jar
 msm-kryo-serializer-1.6.3.jar
 reflectasm-1.01.jar
 spymemcached-2.7.3.jar
防火墙状态 关闭
 
1.jdk安装、环境配置及测试服务端2
1.解压、作软链接
[[email protected]]# tar zxf jdk-7u79-linux-x64.tar.gz -C /usr/local/  #解压jdk
[[email protected]]# cd /usr/local/      #切换到解压目录
[[email protected]]# ls
bin  etc games  include  jdk1.7.0_79 lib  lib64  libexec sbin  share  src
[[email protected]]# ln -s jdk1.7.0_79/ java      #作软链接
[[email protected]]# ll
total44
drwxr-xr-x.2 root root 4096 Jun 28  2011 bin
drwxr-xr-x.2 root root 4096 Jun 28  2011 etc
drwxr-xr-x.2 root root 4096 Jun 28  2011 games
drwxr-xr-x.2 root root 4096 Jun 28  2011 include
lrwxrwxrwx.1 root root  12 Sep 24 10:50 java ->jdk1.7.0_79/    #查看
drwxr-xr-x.8 uucp  143 4096 Apr 11  2015 jdk1.7.0_79
drwxr-xr-x.2 root root 4096 Jun 28  2011 lib
drwxr-xr-x.2 root root 4096 Jun 28  2011 lib64
drwxr-xr-x.2 root root 4096 Jun 28  2011 libexec
drwxr-xr-x.2 root root 4096 Jun 28  2011 sbin
drwxr-xr-x.5 root root 4096 Aug  8 21:38 share
drwxr-xr-x.2 root root 4096 Jun 28  2011 src
2.将jdk添加到环境变量
[[email protected]]# vim /etc/profile   
 79 export JAVA_HOME=/usr/local/java
 80 exportCLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
 81 export PATH=$PATH:$JAVA_HOME/bin
[[email protected]]# source /etc/profile
3.测试
[[email protected]]# echo $JAVA_HOME    #测试添加环境变量是否成功
/usr/local/java
[[email protected]]# echo $CLASSPATH
.:/usr/local/java/lib:/usr/local/java/jre/lib
[[email protected]]# echo $JAVA_HOME   
/usr/local/java
[[email protected]]# cd java      #测试java的环境是否配置成功
[[email protected]]# vim test.java    #写个简单的测试页
  1 public class test{
  2        public static void main(String[] args)
  3        {
  4                System.out.println(“Helloworld!”);
  5        }
  6 }
[[email protected]]# javac test.java    #链接生成test.class文件
[[email protected]]# java test    #执行
Helloworld!
 
2.tomcat的安装服务端2
1.解压、作软链接
[[email protected]]# tar zxf apache-tomcat-7.0.8.tar.gz -C /usr/local/  #解压
[[email protected]]# cd /usr/local/
[[email protected]]# ls
apache-tomcat-7.0.8  etc  include  jdk1.7.0_79  lib64  sbin  src
bin                  games  java    lib          libexec  share
[[email protected]]# ln -s apache-tomcat-7.0.8/ tomcat  #作软链接
[[email protected]]# ll
total48
drwxr-xr-x.9 root root 4096 Sep 24 11:11 apache-tomcat-7.0.8
drwxr-xr-x.2 root root 4096 Jun 28  2011 bin
drwxr-xr-x.2 root root 4096 Jun 28  2011 etc
drwxr-xr-x.2 root root 4096 Jun 28  2011 games
drwxr-xr-x.2 root root 4096 Jun 28  2011 include
lrwxrwxrwx.1 root root  12 Sep 24 10:50 java ->jdk1.7.0_79/
drwxr-xr-x.8 uucp  143 4096 Sep 24 11:02 jdk1.7.0_79
drwxr-xr-x.2 root root 4096 Jun 28  2011 lib
drwxr-xr-x.2 root root 4096 Jun 28  2011 lib64
drwxr-xr-x.2 root root 4096 Jun 28  2011 libexec
drwxr-xr-x.2 root root 4096 Jun 28  2011 sbin
drwxr-xr-x.5 root root 4096 Aug  8 21:38 share
drwxr-xr-x.2 root root 4096 Jun 28  2011 src
lrwxrwxrwx.1 root root  20 Sep 24 11:12 tomcat-> apache-tomcat-7.0.8/    #查看
[[email protected]]# cd tomcat/bin
[[email protected]]# ./startup.sh    #开启tomcat
 
2.测试
[[email protected]]#cd ..
[[email protected]]# vim webapps/ROOT/test.jsp    #写测试仪页
  1 server2-The Time is <%=newjava.util.Date()%>
#测试 172.25.29.2:8080

172.25.29.2:8080/test.jsp

在服务端3上进行同样的配置也可以用scp把服务端2上java和tomcat目录传过去如下
[[email protected]]# scp -r java/ tomcat/ 172.25.29.3:/usr/local/
在进行系统环境里加上java的配置启动tomcat即可
 
3.Nginx添加sticky  (服务端1)
1.nginx负载均衡已经配置好了
在前面的博客里已经写过nginx源码安装这里就不再重复了也可以参考前面的博客
[[email protected]~]# cd /usr/local/lnmp/nginx/conf 
[[email protected]]# vim nginx.conf
 20    upstream wen {
 21                server 172.25.29.2:8080;    #轮询机制
 22                server 172.25.29.3:8080;
 23        }
 49        location / {
 50            root  html;
 51            index  index.html index.jspindex.php index.htm;  #默认发布目录
 52        }
 
 68        location ~ \.jsp$ {
 69            proxy_pass  http://wen;
 70        }
[[email protected]]# nginx -t    #检测
nginx:the configuration file /usr/local/lnmp/nginx/conf/nginx.conf syntax is ok
nginx:configuration file /usr/local/lnmp/nginx/conf/nginx.conf test is successful
[[email protected]]# nginx -s reload    #刷新
测试 172.25.29.1


 
172.25.29.1/test.jsp

刷新之后

也就是server2 和server3相互交替
 
2.改变负载均衡机制为sticky
由于nginx是轮询机制如果在访问页面如填写信息时突然卡住刷新之后就会跳到另一个server上就得重新开始填写。但是Nginx里有很多算法其中的ip_hash也可以防止这些问题。使用ip_hash有一个问题是当客户端和服务器之间使用cdn内容分发系统高速缓存时客户端的访问到达cdn由cdn访问服务器识别的ip是cdn的ip那么将集中于访问后台的一台服务器(x相当于DDOS攻击)会加速服务器的损坏。那么为了防止这些问题就有用下面的算法sticky不是nginx里自带的nginx-sticky-module为 nginx 的第三方模块,使 nginx 支持 sticky 模式,所以需要将包加入配置、重新编译、安装nginx
 
1.重新源码安装nginx添加一个模块
[[email protected]]# nginx -s stop      #关闭nginx
[[email protected]]# tar zxf nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d.tar.gz #解压
[[email protected]]# ls
nginx-1.8.1.tar.gz
nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d
nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d.tar.gz
 
[[email protected]]# make clean    #清除上一次的缓存文件
rm-rf Makefile objs
[[email protected]]# ./configure –prefix=/usr/local/lnmp/nginx  #重新配置–with-http_ssl_module–with-http_stub_status_module–add-module=/mnt/nginx-goodies-nginx-sticky-module-ng-c78b7dd79d0d
[[email protected]]# make    #编译、链接
[[email protected]]# make install  #安装
[[email protected]]#cd /usr/local/lnmp/nginx/conf
[[email protected]]# vim nginx.conf
 18        upstream westos{
 19                sticky;    #使用sticky
 20                server 172.25.29.2:8080;
 21                server 172.25.29.3:8080;
[[email protected]]# nginx -t  #检测nginx文件里是否有错误
nginx:the configuration file /usr/local/lnmp/nginx/conf/nginx.conf syntax is ok
nginx:configuration file /usr/local/lnmp/nginx/conf/nginx.conf test is successful
[[email protected]]# nginx  #启动
2.测试
测试 172.25.29.1/test.jsp

刷新之后结果不变还是


 
4交叉存储避免单点故障添加memcached服务端2
配置好之后如果一台服务器宕机了那么这台服务器正在运行的业务将直接结束正在存储的数据丢失。为了防止这些问题Tomcat1将session存储到Tomcat2的memcached中当Tomcat2的memcached不可用时Tomcat1将session存储到自己的memcached上Tomcat2则正好相反。使用这种配置就避免了单点故障。
1.安装、开启memcached、写测试页
[[email protected]]# yum install -y memcached      #安装memcached
[[email protected]]# /etc/init.d/memcached start      #开启memcached
Startingmemcached:                                        [  OK  ]
[[email protected]]# bin/shutdown.sh  #关闭Tomcat
[[email protected]]# vim test.jsp    #写一个jsp的测试页面
  1 <%@ page contentType=”text/html;charset=GBK” %>
  2 <%@ page import=”java.util.*”%>
  3<html><head><title>Cluster AppTest</title></head>
  4 <body>
  5 Server Info:
  6 <%
  7 out.println(request.getLocalAddr() + “: ” + request.getLocalPort()+”<br>”);%    >
  8 <%
  9 out.println(“<br> ID ” + session.getId()+”<br>”);
 10 String dataName =request.getParameter(“dataName”);
 11 if (dataName != null &&dataName.length() > 0) {
 12 String dataValue =request.getParameter(“dataValue”);
 13 session.setAttribute(dataName, dataValue);
 14 }
 15 out.print(“<b>Sessionlist</b>”);
 16 Enumeration e =session.getAttributeNames();
 17 while (e.hasMoreElements()) {
 18 String name = (String)e.nextElement();
 19 String value =session.getAttribute(name).toString();
 20 out.println( name + ” = ” +value+”<br>”);
 21 System.out.println( name + ” = “+ value);
 22 }
 23 %>
 24 <form action=”test.jsp”method=”POST”>
 25 name:<input type=text size=20name=”dataName”>
 26 <br>
 27 key:<input type=text size=20name=”dataValue”>
 28 <br>
 29 <input type=submit>
 30 </form>
 31 </body>
 32 </html>

[[email protected]]# cd /usr/local/tomcat/lib
[[email protected]]# ls /mnt/update/      #先前下载好的包
asm-3.2.jar                              minlog-1.2.jar
kryo-1.04.jar                          msm-kryo-serializer-1.6.3.jar
kryo-serializers-0.10.jar                reflectasm-1.01.jar
memcached-session-manager-1.6.3.jar      spymemcached-2.7.3.jar
memcached-session-manager-tc7-1.6.3.jar
[[email protected]]# cd /usr/local/tomcat/lib/
[[email protected]]# mv /mnt/update/* .    #将包移动到指定路径
[[email protected]]# ls
annotations-api.jar                memcached-session-manager-tc7-1.6.3.jar
asm-3.2.jar                          minlog-1.2.jar
catalina-ant.jar                    msm-kryo-serializer-1.6.3.jar
catalina-ha.jar                      reflectasm-1.01.jar
catalina.jar                        servlet-api.jar
catalina-tribes.jar                  spymemcached-2.7.3.jar
ecj-4.2.1.jar                        tomcat-api.jar
el-api.jar                          tomcat-coyote.jar
jasper-el.jar                        tomcat-dbcp.jar
jasper.jar                          tomcat-i18n-es.jar
jsp-api.jar                          tomcat-i18n-fr.jar
kryo-1.04.jar                        tomcat-i18n-ja.jar
kryo-serializers-0.10.jar            tomcat-jdbc.jar
memcached-session-manager-1.6.3.jar  tomcat-util.jar
[[email protected]]# cd ..
UsingCATALINA_BASE:  /usr/local/tomcat
UsingCATALINA_HOME:  /usr/local/tomcat
UsingCATALINA_TMPDIR: /usr/local/tomcat/temp
UsingJRE_HOME:        /usr/local/java
UsingCLASSPATH:      /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
[[email protected]]# vim conf/context.xml    #添加节点及节点失效后该怎么存储
 34 <ManagerclassName=”de.javakaffee.web.msm.MemcachedBackupSessionManager”
 35memcachedNodes=”n1:172.25.29.2:11211,n2:172.25.29.3:11211″    #结点
 36 failoverNodes=”n1″          #当n2失效时存储到n1上
 37requestUriIgnorePattern=”.*\.(ico|png|gif|jpg|css|js)$”
 38transcoderFactoryClass=”de.javakaffee.web.msm.serializer.kryo.KryoTranscoderF    actory”
 39 />
[[email protected]]# bin/startup.sh  #开启Tomcat
服务端3和服务端2的配置基本相同唯一不同的是上面提到的/usr/local/tomcat/conf/context.xml里的36行把“n1”改成“n2”可以用scp传过去再做修改。
 
2.测试
测试 172.25.29.1/test.jsp

添加用户

添加完成

添加3个用户

[[email protected]]# tail -f logs/catalina.out      #查看日志
Sep28, 2016 11:39:53 PM de.javakaffee.web.msm.serializer.kryo.KryoTranscoder<init>
INFO:Starting with initialBufferSize 102400 and maxBufferSize 2048000
Sep28, 2016 11:39:53 PM de.javakaffee.web.msm.MemcachedSessionServicestartInternal
INFO:MemcachedSessionService finished initialization, sticky true, operation timeout1000, with node ids [n2] and failover node ids [n1]
Sep28, 2016 11:39:53 PM org.apache.coyote.AbstractProtocol start
INFO:Starting ProtocolHandler [“http-bio-8080”]
Sep28, 2016 11:39:53 PM org.apache.coyote.AbstractProtocol start
INFO:Starting ProtocolHandler [“ajp-bio-8009”]
Sep28, 2016 11:39:53 PM org.apache.catalina.startup.Catalina start
INFO:Server startup in 1921 ms
user1= 111
user2= 222
user1= 111          #上面创建的用户
user2= 222
user1= 111
user3= 333
^C
[[email protected]]# telnet 172.25.29.3 11211  #远程登陆服务端3查看是否是否写进入11211是memcached的端口号
Trying172.25.29.3…
Connectedto 172.25.29.3.
Escapecharacter is ‘^]’.
get50B9BAB1CBB21C9BF884CC3613560752-n2  #get后面的是上面截图里的ID
VALUE50B9BAB1CBB21C9BF884CC3613560752-n2 2048 125
[1]WWqt2Wqt01WqtWqt#50B9BAB1CBB21C9BF884CC3613560752-n2
user2
222user1
111user3
333      #大概可以看出来添加的用户
END
quit
Connectionclosed by foreign host.
 
[[email protected]]# bin/shutdown.sh  #关闭Tomcat1
UsingCATALINA_BASE:  /usr/local/tomcat
UsingCATALINA_HOME:  /usr/local/tomcat
UsingCATALINA_TMPDIR: /usr/local/tomcat/temp
UsingJRE_HOME:        /usr/local/java
UsingCLASSPATH:      /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
 
当关闭Tomcat1续输入数据时并没有中断而是跳到Tomcat2上且数据并未丢失

[[email protected]]# telnet 172.25.29.3 11211    #远程登陆服务端3
Trying172.25.29.3…
Connectedto 172.25.29.3.
Escapecharacter is ‘^]’.
get50B9BAB1CBB21C9BF884CC3613560752-n2
VALUE50B9BAB1CBB21C9BF884CC3613560752-n2 2048 137
[1]WWqt2Wqu01WquWqu4#50B9BAB1CBB21C9BF884CC3613560752-n2

——————————————————————————–
user2  222user1  111user4  444user3  333  #大概可以看到数据还是写入服务端3
END
quit
Connectionclosed by foreign host.

更多Tomcat相关教程见以下内容

CentOS 6.6下安装配置Tomcat环境  http://www.searu.org/2015-08/122234.htm

RedHat Linux 5.5安装JDK+Tomcat并部署Java项目  http://www.searu.org/2015-02/113528.htm 

Tomcat权威指南(第二版)(中英高清PDF版+带书签)  http://www.searu.org/2015-02/113062.htm 

Tomcat 安全配置与性能优化 http://www.searu.org/2015-02/113060.htm 

Linux下使用Xshell查看Tomcat实时日志中文乱码解决方案 http://www.searu.org/2015-01/112395.htm 

CentOS 64-bit下安装JDK和Tomcat并设置Tomcat开机启动操作步骤 http://www.searu.org/2015-01/111485.htm 

CentOS 6.5下安装Tomcat  http://www.searu.org/2015-01/111415.htm 

Tomcat中session的管理机制  http://www.searu.org/2016-09/135072.htm

Tomcat 的详细介绍请点这里
Tomcat 的下载地址请点这里

本文永久更新链接地址http://www.searu.org/2016-10/135984tm

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