springboot+redis的案例很多,但是redis集群的案例很少,so~笔者在这里记录一下~
一、springboot依靠@EnableRedisHttpSession来开启spring session支持,该注解是由spring-session-data-redis提供的,所以在pom.xml文件中添加如下依赖:
org.springframework.boot
spring-boot-starter-redis
1.4.6.RELEASE
org.springframework.session
spring-session-data-redis
二、配置@EnableRedisHttpSession来开启spring session支持
方法一:在springboot启动类上加上@EnableRedisHttpSession来开启spring session支持,其中maxInactiveIntervalInSeconds 的值是session过期时间
方法二:重建redisSession管理类,加上EnableRedisHttpSession配置
@Configuration
@EnableRedisHttpSession (maxInactiveIntervalInSeconds = 1800)
public class RedisSessionConfig {
}
三、在配置文件(application.properties文件或者yaml文件)中配置redis服务器的位置
spring.redis.cluster.nodes=Centos6701:6379,Centos6701:6380,Centos6702:6380,Centos6702:6379,Centos6703:6380,Centos6703:6379
yaml:
spring:
redis:
cluster:
nodes:
- Centos6701:6379
- Centos6701:6380
- Centos6702:6380
- Centos6702:6379
- Centos6703:6379
- Centos6703:6380
四、测试
1、 首先在application.properties中进行设置开启两个tomcat服务,端口分别为8080和9090
2、定义一个Controller
@RestController
@RequestMapping(value = "/admin/v1")
public class QuickRun {
@RequestMapping(value = "/first", method = RequestMethod.GET)
public Map firstResp (HttpServletRequest request){
Map map = new HashMap<>();
request.getSession().setAttribute("request Url", request.getRequestURL());
map.put("request Url", request.getRequestURL());
return map;
}
@RequestMapping(value = "/sessions", method = RequestMethod.GET)
public Object sessions (HttpServletRequest request){
Map map = new HashMap<>();
map.put("sessionId", request.getSession().getId());
map.put("message", request.getSession().getAttribute("map"));
return map;
}
}
3、启动之后进行访问测试,首先访问8080端口的tomcat,返回
{"request Url":"http://localhost:8080/admin/v1/first"}
接着访问8080端口的sessions,返回
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:8080/admin/v1/first"}
最后访问9090端口的sessions,返回
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:8080/admin/v1/first"}
可见,8080与9090两个服务器返回结果一样,实现了session的共享
如果此时再访问9090端口的first的话,首先返回:
{"request Url":"http://localhost:9090/admin/v1/first"}
而两个服务器的sessions都是返回:
{"sessionId":"efcc85c0-9ad2-49a6-a38f-9004403776b5","message":"http://localhost:9090/admin/v1/first"}
通过spring boot + redis来实现session的共享非常简单,而且用处也极大,配合nginx进行负载均衡,便能实现分布式的应用了。
本次的redis并没有进行主从、读写分离、使用zookeeper进行负载均衡等等配置,而且nginx的单点故障也是应用的障碍。
参考文档:
https://www.cnblogs.com/mengmeng89012/p/5519698.html
https://blog.csdn.net/qq_32143169/article/details/78183325
https://blog.csdn.net/qq_32143169/article/details/78183263