[大数据]如何解决会话共享问题

1、单体服务结构

单体服务不存在会话共享的问题?

2、分布式架构

两种方案来解决会话共享的问题：

1、nginx ip-hash方式

nginx.conf配置

	upstream  ngixServers{
        server localhost:8081;
        server localhost:8082;
        ip_hash;
    }
	
    server {
        listen       8888;
        server_name  localhost;
        location / {
        proxy_pass http://ngixServers;
        }
    }

即一个ip只会请求到一个服务器上去

2、spring-session +redis方式

maven配置

<?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 http://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>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.example</groupId>
    <artifactId>miaoshaStu</artifactId>
    <version>1.0-SNAPSHOT</version>

    <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-data-redis</artifactId>
        </dependency>
        <!--spring-session-->
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-data-redis</artifactId>
        </dependency>
    </dependencies>
</project>

@RestController
public class SpringSessionController {

    @GetMapping("query")
    @ResponseBody
    public String query(HttpServletRequest request) {
        HttpSession session = request.getSession();
        session.setAttribute("hello","123123123");
        System.out.println("----------sessionId-----------"+session.getId());
        return String.valueOf(session.getAttribute("hello"));

    }
}

?application.yml:

#redis
server:
  port: 8081
redis:
  host: localhost
  password:
  timeout: PT30M
#spring-session
session:
  store-type: redis
  timeout: PT30M

nginx.config配置：

	upstream  ngixServers{
        server localhost:8081;
        server localhost:8082;
    }
	
    server {
        listen       8888;
        server_name  localhost;
        location / {
        proxy_pass http://ngixServers;
        }
    }

?请求：http://localhost:8888/query

?

?主要是两点：spring-session会让两个服务的sessionId保持一致（自定义httpSession），然后把相关参数设置在redis中以sessionId进行绑定

3、微服务架构

后续补充.........?