分布式集群环境下,如何实现session共享五(spring-session+redis 实现session共享)

  这是分布式集群环境下,如何实现session共享系列的第五篇。在上一篇:分布式集群环境下,如何实现session共享四(部署项目测试)中,针对nginx不同的负载均衡策略:轮询、ip_hash方式,测试了session的不同使用情况,并且留下了一个问题:有没有可能针对nginx负载均衡策略(轮询)的基础上,对session实现共享呢???

  本篇在nginx负载均衡策略(轮询的基础上),通过spring-session将session存储到redis,实现session共享。

 

1.改造项目

  1.1.导入依赖

 <!--spring 版本-->
    <spring.version>5.0.2.RELEASE</spring.version>
    <spring.session.data.redis.version>1.3.1.RELEASE</spring.session.data.redis.version>
    <lettuce.version>3.5.0.Final</lettuce.version>


<!-- spring web包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.session</groupId>
      <artifactId>spring-session-data-redis</artifactId>
      <version>${spring.session.data.redis.version}</version>
    </dependency>
    <dependency>
      <groupId>biz.paluch.redis</groupId>
      <artifactId>lettuce</artifactId>
      <version>${lettuce.version}</version>
    </dependency>

 

  1.2.编写redis配置文件

redis.host=192.168.80.22
redis.pass=myredis
redis.port=6379
redis.session.timeout=600

 

  1.3.编写spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <context:annotation-config />

    <!-- 加载properties文件 -->
    <bean id="configProperties"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:session-redis.properties</value>
            </list>
        </property>
    </bean>

    <!-- RedisHttpSessionConfiguration -->
    <bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
        <!-- session过期时间,单位是秒 -->
        <property name="maxInactiveIntervalInSeconds" value="${redis.session.timeout}" />
    </bean>

    <!--LettuceConnectionFactory -->
    <bean class="org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory"
            p:host-name="${redis.host}" p:port="${redis.port}" />

</beans>

 

  1.4.配置web.xml

<!--加载spring配置文件-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext-session.xml</param-value>
  </context-param>

  <!--配置监听器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--配置过滤器(该过滤器要配置在第一的位置)-->
  <filter>
    <filter-name>springSessionRepositoryFilter</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
  </filter>

  <filter-mapping>
    <filter-name>springSessionRepositoryFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>ERROR</dispatcher>
  </filter-mapping>

 

  1.5.启动redis

#启动redis服务端
[root@hadoop02 bin]# ./redis-server 

#客户端连接操作
[root@hadoop02 bin]# ./redis-cli
#设置允许远程访问
127.0.0.1:6379> CONFIG SET protected-mode no
OK

 

 

2.nginx配置

#添加tomcat列表,真实应用服务器都放在这
upstream tomcat_pool{
        #server tomcat地址:端口号 weight表示权值,权值越大,被分配的几率越大;
        server 192.168.80.22:8080 weight=4 max_fails=2 fail_timeout=30s;
        server 192.168.80.22:8081 weight=4 max_fails=2 fail_timeout=30s;

}

 

3.测试

http://192.168.80.22/session-redis-demo/

  3.1.谷歌浏览器测试

 

  3.2.火狐浏览器测试

 

  3.3.查看redis中存储的session

 

[root@hadoop02 bin]# ./redis-cli
127.0.0.1:6379> keys *
1) "spring:session:expirations:1558614360000"
2) "spring:session:sessions:af12f7a7-3385-44dc-93b2-a3fa82026b25"
3) "spring:session:sessions:abc97363-8f1d-4d1c-a9df-e2a78628af05"
4) "site"
5) "spring:session:sessions:expires:abc97363-8f1d-4d1c-a9df-e2a78628af05"
127.0.0.1:6379>

 

总结:通过spring-session把session存储到redis中,即便nginx负载均衡策略为轮询方式,也一样实现了session的共享,这才是我们的终极目标,真好!!!

 

posted @ 2019-05-25 10:47  小杨【0和1】  阅读(1416)  评论(0编辑  收藏  举报