spring boot分布式部署集成Spring session+redis cluster实现共享Session

项目本身是Spring boot单体应用，需横向扩展部署多台应用，由于JWT改造改动过大，评估后确定采用Spring session+redis cluster实现共享Session。

redis cluster安装过程参考

redis集群搭建

nginx负载均衡参考

Nginx多台服务器负载均衡

1.Maven引用

<dependency>
    <groupId>org.springframework.session</groupId>
    <artifactId>spring-session-data-redis</artifactId>
    <version>1.3.1.RELEASE</version>
    <type>pom</type>
</dependency>
<dependency>
    <groupId>biz.paluch.redis</groupId>
    <artifactId>lettuce</artifactId>
    <version>3.5.0.Final</version>
</dependency>

2.启动类上添加注解

@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 7200)

3.web.xml增加

!--要放第一个位置-->
    <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>

4.修改application.properties配置文件

#采用redis存储session
spring.session.store-type=redis
spring.redis.cluster.nodes=192.168.14.133:8001,192.168.14.133:8002,192.168.14.133:8003,192.168.14.133:8004,192.168.14.133:8006,192.168.14.133:8007
spring.redis.password=密码
#redis-lettuce
spring.redis.lettuce.pool.max-active=8
spring.redis.lettuce.pool.max-wait=1
spring.redis.lettuce.pool.max-idle=8
spring.redis.lettuce.pool.min-idle=0

5.在Controller增加测试方法

    @ResponseBody
    @RequestMapping(value = "/session")
    public Map<String, Object> getSession(HttpServletRequest request) {
        request.getSession().setAttribute("username", "admin");
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("sessionId", request.getSession().getId());
        return map;
    }

注意：一定要确保部署的多台服务器，时间一致，否则session失效，会生成新的sessionid，导致测试结果不准确。