基于nginx tomcat redis分布式web应用的session共享配置

最新推荐文章于 2021-11-22 20:50:45 发布
最新推荐文章于 2021-11-22 20:50:45 发布
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分类专栏： nginx负载均衡 网站架构设计

一、前言

nginx 作为目前最流行的开源反向代理HTTP Server，用于实现资源缓存、web server负载均衡等功能，由于其轻量级、高性能、高可靠等特点在互联网项目中有着非常普遍的应用，相关概念网上有丰富的介绍。分布式web server集群部署后需要实现session共享，针对 tomcat 服务器的实现方案多种多样，比如 tomcat cluster session 广播、nginx IP hash策略、nginx sticky module等方案，本文主要介绍了使用 redis 服务器进行 session 统一存储管理的共享方案。

相关应用结构参照下图：

二、环境配置

测试环境基于 Linux CentOS 6.5，请先安装 tomcat、redis、nginx 相关环境，不作详细描述，本文测试配置如下：

  Version IP_Port
nginx1.6.210.129.221.70:80
tomcat_17.0.5410.129.221.70:8080
tomcat_27.0.5410.129.221.70:9090
redis2.8.1910.129.221.70:6379

三、构建 tomcat-redis-session-manager-master

1、由于源码构建基于 gradle，请先配置 gradle 环境。

2、从 github 获取 tomcat-redis-session-manager-master 源码，地址如下：

<span class="symbol" style="margin: 0px; padding: 0px;">https:</span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">/<span class="regexp" style="margin: 0px; padding: 0px;">/</span></span><span class="regexp" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">github.com/jcoleman</span></span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">/tomcat-redis-session-manager</span>

3、找到源码中的 build.gradle 文件，由于作者使用了第三方仓库（sonatype），需要注册帐号，太麻烦，注释后直接使用maven中央仓库，同时注释签名相关脚本并增加依赖包的输出脚本 copyJars（dist目录），修改后的build.gradle 文件如下：

<span style="margin: 0px; padding: 0px;">apply plugin: <span class="string" style="margin: 0px; padding: 0px;">'java'</span>
apply plugin: <span class="string" style="margin: 0px; padding: 0px;">'maven'</span>
apply plugin: <span class="string" style="margin: 0px; padding: 0px;">'signing'</span>

<span class="keyword" style="margin: 0px; padding: 0px;">group</span> </span>=<span style="margin: 0px; padding: 0px;"> <span class="string" style="margin: 0px; padding: 0px;">'com.orangefunction'</span>
version </span>= <span class="string" style="margin: 0px; padding: 0px;">'2.0.0<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">

repositories {
  mavenCentral()
}

compileJava {
  sourceCompatibility </span>= <span class="number" style="margin: 0px; padding: 0px;">1.7</span><span style="margin: 0px; padding: 0px;">
  targetCompatibility </span>= <span class="number" style="margin: 0px; padding: 0px;">1.7</span><span style="margin: 0px; padding: 0px;">
}

dependencies {
  compile <span class="keyword" style="margin: 0px; padding: 0px;">group</span>: <span class="string" style="margin: 0px; padding: 0px;">'org.apache.tomcat'</span>, name: <span class="string" style="margin: 0px; padding: 0px;">'tomcat</span></span><span class="string" style="margin: 0px; padding: 0px;">-catalina'</span>, version: <span class="string" style="margin: 0px; padding: 0px;">'7.0.27<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  compile <span class="keyword" style="margin: 0px; padding: 0px;">group</span>: <span class="string" style="margin: 0px; padding: 0px;">'redis.clients'</span>, name: <span class="string" style="margin: 0px; padding: 0px;">'jedis'</span>, version: <span class="string" style="margin: 0px; padding: 0px;">'</span></span><span class="string" style="margin: 0px; padding: 0px;">2.5.2<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  compile <span class="keyword" style="margin: 0px; padding: 0px;">group</span>: <span class="string" style="margin: 0px; padding: 0px;">'org.apache.commons'</span>, name: <span class="string" style="margin: 0px; padding: 0px;">'commons</span></span><span class="string" style="margin: 0px; padding: 0px;">-pool2'</span>, version: <span class="string" style="margin: 0px; padding: 0px;">'2.2<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  </span><span class="comment" style="margin: 0px; padding: 0px;">//compile group: 'commons-codec', name: 'commons-codec', version: '1.9<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">

  testCompile <span class="keyword" style="margin: 0px; padding: 0px;">group</span>: <span class="string" style="margin: 0px; padding: 0px;">'junit'</span>, name: <span class="string" style="margin: 0px; padding: 0px;">'junit'</span>, version: <span class="string" style="margin: 0px; padding: 0px;">'</span></span><span class="string" style="margin: 0px; padding: 0px;">4.+<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  testCompile <span class="string" style="margin: 0px; padding: 0px;">'org.hamcrest:hamcrest</span></span><span class="string" style="margin: 0px; padding: 0px;">-core:1.3<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  testCompile <span class="string" style="margin: 0px; padding: 0px;">'org.hamcrest:hamcrest</span></span><span class="string" style="margin: 0px; padding: 0px;">-library:1.3<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  testCompile <span class="string" style="margin: 0px; padding: 0px;">'org.mockito:mockito</span></span><span class="string" style="margin: 0px; padding: 0px;">-all:1.9.5<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
  testCompile <span class="keyword" style="margin: 0px; padding: 0px;">group</span>: <span class="string" style="margin: 0px; padding: 0px;">'org.apache.tomcat'</span>, name: <span class="string" style="margin: 0px; padding: 0px;">'tomcat</span></span><span class="string" style="margin: 0px; padding: 0px;">-coyote'</span>, version: <span class="string" style="margin: 0px; padding: 0px;">'7.0.27<span style="margin: 0px; padding: 0px;">'</span></span><span style="margin: 0px; padding: 0px;">
}

task javadocJar(type: Jar, dependsOn: javadoc) {
  classifier </span>=<span style="margin: 0px; padding: 0px;"> <span class="string" style="margin: 0px; padding: 0px;">'javadoc'</span>
  <span class="keyword" style="margin: 0px; padding: 0px;">from</span> <span class="string" style="margin: 0px; padding: 0px;">'build</span></span><span class="string" style="margin: 0px; padding: 0px;">/docs/<span style="margin: 0px; padding: 0px;">javadoc'</span></span><span style="margin: 0px; padding: 0px;">
}

task sourcesJar(type: Jar) {
  <span class="keyword" style="margin: 0px; padding: 0px;">from</span> sourceSets.main.allSource
  classifier </span>=<span style="margin: 0px; padding: 0px;"> <span class="string" style="margin: 0px; padding: 0px;">'sources'</span>
}

artifacts {
  archives jar

  archives javadocJar
  archives sourcesJar
}

</span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">signing {</span></span><span style="margin: 0px; padding: 0px;">
</span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">  sign configurations.archives</span></span><span style="margin: 0px; padding: 0px;">
</span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">}</span></span><span style="margin: 0px; padding: 0px;">

task copyJars(type: Copy) {
  <span class="keyword" style="margin: 0px; padding: 0px;">from</span> configurations.runtime
  <span class="keyword" style="margin: 0px; padding: 0px;">into</span> <span class="string" style="margin: 0px; padding: 0px;">'dist'</span>  
}

uploadArchives {
  repositories {
    mavenDeployer {
      beforeDeployment { MavenDeployment deployment </span>-><span style="margin: 0px; padding: 0px;"> signing.signPom(deployment) }

      </span><span class="comment" style="margin: 0px; padding: 0px;">//repository(url: <span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">https://oss.sonatype.org/service/local/staging/deploy/maven2/</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span><span style="margin: 0px; padding: 0px;">) {</span></span><span style="margin: 0px; padding: 0px;">
      </span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">  authentication(userName: sonatypeUsername, password: sonatypePassword)</span></span><span style="margin: 0px; padding: 0px;">
      </span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">}</span></span><span style="margin: 0px; padding: 0px;">
      </span><span class="comment" style="margin: 0px; padding: 0px;">//repository(url: <span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">https://oss.sonatype.org/content/repositories/snapshots</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span><span style="margin: 0px; padding: 0px;">) {</span></span><span style="margin: 0px; padding: 0px;">
      </span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">  authentication(userName: sonatypeUsername, password: sonatypePassword)</span></span><span style="margin: 0px; padding: 0px;">
      </span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">}</span></span><span style="margin: 0px; padding: 0px;">

      pom.project {
        name <span class="string" style="margin: 0px; padding: 0px;">'tomcat</span></span><span class="string" style="margin: 0px; padding: 0px;">-redis-session-<span style="margin: 0px; padding: 0px;">manager'</span></span><span style="margin: 0px; padding: 0px;">
        packaging <span class="string" style="margin: 0px; padding: 0px;">'jar'</span>
        description <span class="string" style="margin: 0px; padding: 0px;">'Tomcat Redis Session Manager is a Tomcat extension to store sessions </span></span><span class="string" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 0, 255);">in</span><span style="margin: 0px; padding: 0px;"> Redis'</span></span><span style="margin: 0px; padding: 0px;">
        url <span class="string" style="margin: 0px; padding: 0px;">'https:</span></span><span class="string" style="margin: 0px; padding: 0px;">//github.com/jcoleman/tomcat-redis-session-<span style="margin: 0px; padding: 0px;">manager'</span></span><span style="margin: 0px; padding: 0px;">

        issueManagement {
          url <span class="string" style="margin: 0px; padding: 0px;">'https:</span></span><span class="string" style="margin: 0px; padding: 0px;">//github.com:jcoleman/tomcat-redis-session-manager/<span style="margin: 0px; padding: 0px;">issues'</span></span><span style="margin: 0px; padding: 0px;">
          system <span class="string" style="margin: 0px; padding: 0px;">'GitHub Issues'</span>
        }

        scm {
          url <span class="string" style="margin: 0px; padding: 0px;">'https:</span></span><span class="string" style="margin: 0px; padding: 0px;">//github.com:jcoleman/tomcat-redis-session-<span style="margin: 0px; padding: 0px;">manager'</span></span><span style="margin: 0px; padding: 0px;">
          connection <span class="string" style="margin: 0px; padding: 0px;">'scm:git:git:</span></span><span class="string" style="margin: 0px; padding: 0px;">//github.com/jcoleman/tomcat-redis-session-<span style="margin: 0px; padding: 0px;">manager.git'</span></span><span style="margin: 0px; padding: 0px;">
          developerConnection <span class="string" style="margin: 0px; padding: 0px;">'scm:git:git</span></span><span class="string" style="margin: 0px; padding: 0px;">@github.com:jcoleman/tomcat-redis-session-<span style="margin: 0px; padding: 0px;">manager.git'</span></span><span style="margin: 0px; padding: 0px;">
        }

        licenses {
          license {
            name <span class="string" style="margin: 0px; padding: 0px;">'MIT'</span>
            url <span class="string" style="margin: 0px; padding: 0px;">'http:</span></span><span class="string" style="margin: 0px; padding: 0px;">//opensource.org/licenses/<span style="margin: 0px; padding: 0px;">MIT'</span></span><span style="margin: 0px; padding: 0px;">
            distribution <span class="string" style="margin: 0px; padding: 0px;">'repo'</span>
          }
        }

        developers {
          developer {
            id <span class="string" style="margin: 0px; padding: 0px;">'jcoleman'</span>
            name <span class="string" style="margin: 0px; padding: 0px;">'James Coleman'</span>
            email <span class="string" style="margin: 0px; padding: 0px;">'jtc331</span></span><span class="string" style="margin: 0px; padding: 0px;">@<span style="margin: 0px; padding: 0px;">gmail.com'</span></span><span style="margin: 0px; padding: 0px;">
            url <span class="string" style="margin: 0px; padding: 0px;">'https:</span></span><span class="string" style="margin: 0px; padding: 0px;">//github.com/<span style="margin: 0px; padding: 0px;">jcoleman'</span></span><span style="margin: 0px; padding: 0px;">
          }
        }
      }
    }
  }
}</span>
View Code

4、执行gradle命令构建源码，编译输出tomcat-redis-session-manager-master 及依赖jar包

gradle build -x test  copyJars

所有输出列表文件如下：

四、tomcat 配置

安装配置两台 tomcat web服务器，分别修改 Connector 端口号为8080和9090，并确保都能正常工作，当然如果分布在不同的主机则可以使用相同端口号。

五、编写测试页面

为了区别2台tomcat的访问，分别编写页面并打包部署：

1、为tomcat_1编写测试页面，显示 “ response from tomcat_1 ”，同时页面提供按钮显示当前session值，打包并发布到 tomcat_1 服务器；

2、为tomcat_2编写测试页面，显示 “ response from tomcat_2 ”，同时页面提供按钮显示当前session值，打包并发布到 tomcat_2 服务器；

此时分别访问 http://10.129.221.70:8080 和 http://10.129.221.70:9090 地址，因为访问的是不同web服务器，所以各自显示不同的页面内容及session值肯定不同。

六、tomcat session manager 配置

修改配置使用 tomcat-redis-session-manager-master 作为 tomcat session 管理器

1、分别将第三步生成的 tomcat-redis-session-manager-master 及依赖jar包覆盖到 tomcat 安装目录的 lib 文件夹

2、分别修改2台 tomcat 的 context.xml 文件，使 tomcat-redis-session-manager-master 作为session管理器，同时指定redis地址和端口。

context.xml 增加以下配置：

<span class="tag" style="margin: 0px; padding: 0px;"><<span class="title" style="margin: 0px; padding: 0px;">Context</span>></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="tag" style="margin: 0px; padding: 0px;"><<span class="title" style="margin: 0px; padding: 0px;">Valve</span> <span class="attribute" style="margin: 0px; padding: 0px;">className</span></span></span><span class="tag" style="margin: 0px; padding: 0px;">=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span> /></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="tag" style="margin: 0px; padding: 0px;"><<span class="title" style="margin: 0px; padding: 0px;">Manager</span> <span class="attribute" style="margin: 0px; padding: 0px;">className</span></span></span><span class="tag" style="margin: 0px; padding: 0px;">=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">com.orangefunction.tomcat.redissessions.RedisSessionManager</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="attribute" style="margin: 0px; padding: 0px;">host</span></span>=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">localhost</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="attribute" style="margin: 0px; padding: 0px;">port</span></span>=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">6379</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="attribute" style="margin: 0px; padding: 0px;">database</span></span>=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">0</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span> <span class="attribute" style="margin: 0px; padding: 0px;">maxInactiveInterval</span></span>=<span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);"><span class="value" style="margin: 0px; padding: 0px;">"</span></span><span class="value" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">60</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 0);">"</span></span> /></span><span style="margin: 0px; padding: 0px;">
<span class="tag" style="margin: 0px; padding: 0px;"><</span></span><span class="tag" style="margin: 0px; padding: 0px;">/<span class="title" style="margin: 0px; padding: 0px;">Context</span>></span>

3、分别重启2台 tomcat 服务器。

七、nginx 配置

1、修改 default.conf 配置文件，启用 upstream 负载均衡 tomcat Cluster，默认使用轮询方式。

<span style="margin: 0px; padding: 0px;">upstream site {  
<span class="indent" style="margin: 0px; padding: 0px;">  </span>server localhost:</span><span class="number" style="margin: 0px; padding: 0px;">8080</span><span style="margin: 0px; padding: 0px;">; 
<span class="indent" style="margin: 0px; padding: 0px;">  </span>server localhost:</span><span class="number" style="margin: 0px; padding: 0px;">9090</span><span style="margin: 0px; padding: 0px;">; 
}  
server {
<span class="indent" style="margin: 0px; padding: 0px;">  </span>listen	   </span><span class="number" style="margin: 0px; padding: 0px;">80</span><span style="margin: 0px; padding: 0px;">;
<span class="indent" style="margin: 0px; padding: 0px;">  </span>server_name  localhost;
<span class="indent" style="margin: 0px; padding: 0px;">  </span></span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">charset koi8-r;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">access_log  /var/log/nginx/log/host.access.log  main;</span></span>
<span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span>location </span>/<span style="margin: 0px; padding: 0px;"> {
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span></span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">root   /usr/share/nginx/html;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">index  index.html index.htm; </span></span>
<span style="margin: 0px; padding: 0px;"><span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>index  index_tel.jsp index.jsp index.html index.htm ;  
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_redirect		  off;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_set_header		Host			</span><span style="margin: 0px; padding: 0px; color: rgb(128, 0, 128);">$host</span><span style="margin: 0px; padding: 0px;">;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_set_header		X</span>-Real-IP	   <span style="margin: 0px; padding: 0px; color: rgb(128, 0, 128);">$remote_addr</span><span style="margin: 0px; padding: 0px;">;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_set_header		X</span>-Forwarded-<span style="margin: 0px; padding: 0px; color: rgb(0, 0, 255);">For</span> <span style="margin: 0px; padding: 0px; color: rgb(128, 0, 128);">$proxy_add_x_forwarded_for</span><span style="margin: 0px; padding: 0px;">;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>client_max_body_size	<span class="number" style="margin: 0px; padding: 0px;">10</span>m;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>client_body_buffer_size <span class="number" style="margin: 0px; padding: 0px;">128</span>k;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_buffers		   </span><span class="number" style="margin: 0px; padding: 0px;">32</span><span style="margin: 0px; padding: 0px;"> <span class="number" style="margin: 0px; padding: 0px;">4</span>k;  
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_connect_timeout   </span><span class="number" style="margin: 0px; padding: 0px;">3</span><span style="margin: 0px; padding: 0px;">;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_send_timeout	  </span><span class="number" style="margin: 0px; padding: 0px;">30</span><span style="margin: 0px; padding: 0px;">;	
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_read_timeout	  </span><span class="number" style="margin: 0px; padding: 0px;">30</span><span style="margin: 0px; padding: 0px;">;   
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>proxy_pass http:</span><span class="comment" style="margin: 0px; padding: 0px;">//<span style="margin: 0px; padding: 0px;">site; </span></span><span style="margin: 0px; padding: 0px;">
<span class="indent" style="margin: 0px; padding: 0px;">  </span>}
<span class="indent" style="margin: 0px; padding: 0px;">  </span></span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">error_page  404			  /404.html;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"> redirect server error pages to the static page /50x.html</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"><span class="comment" style="margin: 0px; padding: 0px;">#</span>
</span><span class="indent" style="margin: 0px; padding: 0px;">  </span>error_page   <span class="number" style="margin: 0px; padding: 0px;">500</span> <span class="number" style="margin: 0px; padding: 0px;">502</span> <span class="number" style="margin: 0px; padding: 0px;">503</span> <span class="number" style="margin: 0px; padding: 0px;">504</span>  /<span style="margin: 0px; padding: 0px;"><span class="number" style="margin: 0px; padding: 0px;">50</span>x.html;
<span class="indent" style="margin: 0px; padding: 0px;">  </span>location </span>= /<span style="margin: 0px; padding: 0px;"><span class="number" style="margin: 0px; padding: 0px;">50</span>x.html {
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span class="indent" style="margin: 0px; padding: 0px;">  </span>root   </span>/usr/share/nginx/<span style="margin: 0px; padding: 0px;">html;
<span class="indent" style="margin: 0px; padding: 0px;">  </span>}
<span class="indent" style="margin: 0px; padding: 0px;">  </span></span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"> proxy the PHP scripts to Apache listening on 127.0.0.1:80</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"><span class="comment" style="margin: 0px; padding: 0px;">#</span>
</span><span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">location ~ \.php$ {</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	proxy_pass   http://127.0.0.1;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">}</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"> pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"><span class="comment" style="margin: 0px; padding: 0px;">#</span>
</span><span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">location ~ \.php$ {</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	root		   html;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	fastcgi_pass   127.0.0.1:9000;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	fastcgi_index  index.php;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	include		fastcgi_params;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">}</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"> deny access to .htaccess files, if Apache's document root</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"> concurs with nginx's one</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);"><span class="comment" style="margin: 0px; padding: 0px;">#</span>
</span><span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">location ~ /\.ht {</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">	deny  all;</span></span>
<span class="indent" style="margin: 0px; padding: 0px;">  </span><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">#</span><span class="comment" style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px; color: rgb(0, 128, 0);">}</span></span>
}

2、nginx 重新加载配置

[sql]  view plain  copy
  1. nginx -s re<span class="operator" style="margin:0px; padding:0px">load</span>  

八、测试结果

1、访问 http://10.129.221.70:8080 直接请求到tomcat_1服务器，

显示 “ response from tomcat_1 ”， session 值为 ‘56E2FAE376A47F1C0961D722326B8423’；

2、访问 http://10.129.221.70:9090 直接请求到tomcat_2服务器，

显示 “ response from tomcat_2 ”， session 值为 ‘56E2FAE376A47F1C0961D722326B8423’；

3、访问 http://10.129.221.70 （默认80端口）请求到 nginx 反向代理到指定Web服务器，由于默认使用轮询负载方式，

反复刷新页面显示的内容在“ response from tomcat_1 ” 和 “ response from tomcat_2 ”之间切换，但 session 值保持为 ‘56E2FAE376A47F1C0961D722326B8423’；

4、使用 redis-cli 连接 redis 服务器，查看会显示有 “56E2FAE376A47F1C0961D722326B8423” key的 session 数据，value为序列化数据。

九、至此实现了基于nginx负载均衡下 tomcat 集群的 session 一致性。

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