<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.sunny.spring.boot</groupId>
<artifactId>springboot-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--session相关-->
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
redis连接信息需要修改为自己的
spring:
session:
store-type: redis #session的存储方式
redis:
host: 192.168.31.170
port: 6379
password: admin@1009
package com.sunny.spring.boot.controller;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
/**
* @ClassName: SessionController
* @Description: session操作
* @Author: sunt
* @Date: 2019/8/26 14:53
* @Version 1.0
**/
@RequestMapping("/session")
@RestController
public class SessionController {
/**
* 获取session信息
* @param request
* @return
*/
@RequestMapping("/getSeesion")
public String getSeesion(HttpServletRequest request) {
String sessionId = request.getSession().getId();
int serverPort = request.getServerPort();
System.out.println("当前请求session:" + sessionId);
return "请求服务器端口号:" + serverPort + ",当前服务器的seionId:" + sessionId;
}
}
启动如果报如下错误信息,需要检查redis连接信息是否配置准确
本地访问:http://127.0.0.1:8080/session/getSeesion 可以获取到sessionid说明项目可以正常启动和访问,接下来需要配置nginx部署多个应用程序实现负载均衡
编辑nginx.conf配置文件,需要做如下配置即可
#配置负载地址
upstream session-redis {
server 127.0.0.1:18081 weight=1; #weight是权重的意思,值越大分配访问的概率越大
server 127.0.0.1:18082 weight=3;
server 127.0.0.1:18083 weight=2;
}
proxy_pass http://session-redis;
注意:session-redis必须要与上一步upstream后面的名称保持一致,这个名称无要求自己随意指定
./sbin/nginx -t
./sbin/nginx -s reload
按照nginx负载均衡配置,同一个应用程序以18081,18082,18083端口部署三份,并为各自端口分别指定输出日志到server1.log、server2.log、server3.log
nohup java -jar springboot-demo-0.0.1-SNAPSHOT.jar --server.port=18081 > server1.log &
nohup java -jar springboot-demo-0.0.1-SNAPSHOT.jar --server.port=18082 > server2.log &
nohup java -jar springboot-demo-0.0.1-SNAPSHOT.jar --server.port=18083 > server3.log &
浏览器访问默认nginx的80端口,如果可以正常转发到各个应用程序并且访问到每个应用程序的session会话一致说明配置负载和session共享搭建成功
这里本来打算录制个gif操作图,但是录制了好几次都太大只能保存一部分,有好的gif录制麻烦评论区推荐一波,这里就截图展示
通过浏览器访问获取session请求:http://192.168.31.170/session/getSeesion不断刷新,可以看到sever*.log随机输出日志,但是访问到serve1的频率最低(1次),说明我们配置的权重也生效
页面访问展示
日志文件截图展示