显示目录

Spring Security 集群

集群的关键点是 session 共享,这里使用 spring-session-data-redis 把 session 存储到 Redis 实现集群里 session 的共享,全是配置,不需要修改一行 Java 代码就能实现 Session 的集群共享。

Gradle 依赖

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"org.springframework.session:spring-session-data-redis:1.1.1.RELEASE"

spring-session.xml

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<?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"
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/>
<bean class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"/>
<bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration"/>
</beans>

虽然上面的配置一般情况下足够了,但是很多时候需要配置 JedisPool, Redis Server 的 IP,密码等等,可以参考下面的配置:

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<?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"
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/>
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"/>
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
<!--<property name="hostName" value="${redis.host}" />-->
<!--<property name="port" value="${redis.port}" />-->
<!--<property name="password" value="${redis.password}" />-->
<!--<property name="timeout" value="${redis.timeout}" />-->
<property name="poolConfig" ref="jedisPoolConfig" />
<property name="usePool" value="true" />
</bean>
<bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
</bean>
<!-- 将session放入redis -->
<bean id="redisHttpSessionConfiguration"
class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration">
<property name="maxInactiveIntervalInSeconds" value="1800" />
</bean>
</beans>

web.xml

Spring Session Data Redis 使用 Servlet Filter 来实现的,filter-name 必须为 springSessionRepositoryFilter,并且必须放在 Spring Security 的 filter springSecurityFilterChain 之前(filter 是按照定义的顺序加载的),web.xml 中加入下面的代码:

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<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:config/spring-session.xml
classpath:config/spring-security.xml
</param-value>
</context-param>
<!-- Spring Session Data Redis Filter -->
<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>
</filter-mapping>

通过上面的配 就实现了在 Redis 里存储 Session,集群里共享 Session 了,不需要修改任何代码,当然,别忘了启动 Redis 服务器(redis-servr)。

测试

  • Redis 必须在应用前启动
    • 应用启动前没有启动 Redis,应用启动失败,不能处理请求
    • 应用启动前已经启动 Redis,应用启动成功,中途 Redis 关闭了,处理请求会报异常,再次启动 Redis,应用会自动连接 Redis,正常处理请求
  • 既然是集群,就需要一个负债均衡如 Nginx 来分发请求
  • 启动多个应用的实例
  • 访问 http://biao.com/admin
  • 登陆
  • 不停的刷新访问 http://biao.com/admin
  • 看到只需要一次登陆,集群中的所有应用都不需要再次登陆了

参考