分别下载
tomcat http://archive.apache.org/dist/tomcat/tomcat-7/v7.0.22/bin/apache-tomcat-7.0.22.tar.gz
nginx http://nginx.org/download/nginx-1.1.14.tar.gz
准备两个虚拟机:
server1 192.168.1.112
server2 192.168.1.64
Tomcat直接解压,运行,使用默认的8080端口
tar zxvf apache-tomcat-7.0.22.tar.gz |
cd apache-tomcat-7.0.22/bin |
./startup.sh |
访问http://192.168.1.112:8080和http://192.168.1.64:8080出现Tomcat首页即可
接下来安装nginx, nginx我就直接安装在server1上
nginx_upstream_jvm_route是一个Nginx的扩展模块,用来实现基于Cookie的SessionSticky的功能, 去SVN下载最新版
svn checkout http://nginx-upstream-jvm-route.googlecode.com/svn/trunk/ /root/dev/nginx-upstream-jvm-route-read-only
解压nginx
tar zxvf nginx-1.1.14.tar.gz cd nginx-1.1.14
运行
patch -p0 < /root/dev/nginx-upstream-jvm-route-read-only/jvm_route.patch
./configure --prefix=/etc/nginx --with-http_stub_status_module --add-module=/root/dev/nginx-upstream-jvm-route-read-only/
make
make install
在nginx安装目录下的conf/目录新建一个文件proxy.conf(/etc/nginx/conf/proxy.conf), 内容如下:
proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k;
修改nginx配置文件/etc/nginx/conf/nginx.conf
完整配置如下
http { include mime.types; #反向代理配置 include proxy.conf; default_type application/octet-stream; sendfile on;
keepalive_timeout 65; upstream server1{ server 192.168.1.112:8080 srun_id=tomcat1; server 192.168.1.64:8080 srun_id=tomcat2; jvm_route $cookie_JSESSIONID|sessionid reverse; } server { listen 80; server_name localhost; access_log /var/log/nginx/access.log; location ~ ^/NginxStatus/ { stub_status on; #Nginx 状态监控配置 access_log off; } location ~ ^/(WEB-INF)/ { deny all; } location / { root html; index index.html index.htm; proxy_pass http://server1; } location /doc { root /usr/share; autoindex on; allow 127.0.0.1; deny all; } location /images { root /usr/share; autoindex on; }
具体配置说明请参考《轻量级WEB服务器Nginx》
然后运行nginx
/etc/nginx/sbin/nginx
访问http://192.168.1.112/NginxStatus,可以看到nginx状态
然后修改tomcat配置文件, 打开apache-tomcat-7.0.22/conf/server.xml, 找到最下面的<Engine name="Catalina" defaultHost="localhost">节点, 修改为
server1
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
并插入如下配置
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="224.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="192.168.1.112" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender" /> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/> <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
server2
...
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2"> <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8"> <Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true"/> <Channel className="org.apache.catalina.tribes.group.GroupChannel"> <Membership className="org.apache.catalina.tribes.membership.McastService" address="224.0.0.4" port="45564" frequency="500" dropTime="3000"/> <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver" address="192.168.1.64" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/> <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter"> <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender" /> </Sender> <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/> <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/> </Channel> <Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter=""/> <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/> <ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/> <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/> </Cluster>
...
jvmRoute="tomcat1"和nginx配置upstream中的srun_id对应
membership中的address=224.0.0.4为组播IP,集群中的tomcat通信之用
receiver中的address设为本机IP,或auto,如果多个Tomcat在同一台电脑上,则要保证port端口不重复
在两个tomcat的webapps目录下分别新建一个项目test,
/test
/test/index.jsp
/test/WEB-INF/
/test/WEB-INF/web.xml
index.jsp内容
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <%=session.getId() %><br> <%String msg = (String)session.getAttribute("msg"); if(null == msg){ session.setAttribute("msg", "Hello!"); }else{ session.setAttribute("msg", msg + 0); } %> <%=session.getAttribute("msg") %> </body> </html>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <distributable/> </web-app>
注意上面的distributable节点,表示该应用是在集群环境下的。
重启tomcat后在两台机子上访问http://192.168.1.112/test
从SessionId后面带的服务器名可以看到负载均衡的效果。
然后将server1上的tomcat停掉,再刷新页面,可以看到原来访问server1的页面成功地切换到了server2,而sessionId没有变,session中的msg也和原来一样。
相关推荐
首先大家注意: 本文章中没有session共享,关于session共享我会在下一篇中讲解,先实现Nginx+tomcat负载均衡再实现session共享。 从网上查了好多资料,多走了很多弯路,现在把自己成功的方法拿出来与大家分享。 ...
Nginx+Tomcat负载均衡&动静分离实战 从0开始构建Nginx WEB平台; 1)实战Tomcat WEB集群&代码发布; 2)Nginx负载均衡Tomcat集群&动静分离&Rewrite实战;
linux nginx+tomcat 负载均衡简单原理,其中以很简单明了的图片流程呈现nginx的负载均衡原理,当然其中也包含负载均衡的实例代码。供学者参考。
Nginx+Tomcat 搭建负载均衡三分钟搞定!!!!!!!!
Nginx+tomcat配置集群负载均衡实现动静分离实例
Nginx+tomcat负载均衡集群session复制 windos
nginx+tomcat负载均衡简单配置
包含课件和源代码适合与开发人员和运维人员学习和深入理解
小型网站上进行的nginx+tomcat负载均衡与动静分离
nginx+tomcat实现负载均衡,共享session的两种方式: 1.使用Redis共享session 2.使用tomcat的组播功能。
部署Nginx+Tomcat负载均衡集群部署思路: 1、Tomcat服务器设置 关闭防火墙 //两台保持一致 安装JDK //两台保持一致 安装Tomcat //两台保持一致 创建站点/www/test目录,修改server.xml文件 //两台保持一致 创建...
Nginx++Keepalived+Tomcat负载 均衡 &动 静 分 离。配置
nginx+redis负载均衡、session共享,基于redis+tomcat实现session同步的简单demo
文档非常详细介绍了linux下nginx+tomcat负载均衡配置 包括nginx安装 nginx配置 tomcat配置 验证配置与测试负载均衡 nginx与tomcat动静态请求分离配置 nginx缓存配置。
Nginx+tomcat 实现负载均衡session共享demo,和http://blog.csdn.net/u014513883/article/details/48550709 类似
win7下nginx+tomcat负载均衡 第一次接触nginx自己花了半天时间研究的结果,和大家一同分享。
Nginx+Tomcat负载均衡解决方案,当前信息系统的应用范围越来越广泛,我们的信息系统从开始的只需向少量用户提供服务,到现在越来越频繁的需要应对大量用户同时在线,系统高并发的情况也越来越常见,并且对系统的稳定...
keepalived+Nginx+Tomcat负载均衡配置文档,生产实施原文档,欢迎大家参考。
nginx+tomcatf负载均衡录像 实验结果:一个IP刷新实现两网页的切换实现负载均衡
Nginx+keepalived+tomcat实现性负载均衡