Springboot使用zuul进行负载均衡

完整项目代码地址参考：https://github.com/SimonHu1993/SpringbootZuul

1.这里我们使用Eureka来作为服务的注册与发现中心，首先看看Eureka client客户端配置文件

server:
  port: 10013
  contextPath: /cardmember
  session:
    timeout: 1800
logging:
  config: classpath:log4j2-dev-spring.yml

#spring配置
spring:
  application:
    name: cardmember
  datasource:
      driver-class-name: oracle.jdbc.driver.OracleDriver
      url: jdbc:oracle:thin:@xxx:1521/xshdb
      username: xxxx
      password: xxx
      type: com.zaxxer.hikari.HikariDataSource
      hikari:
        maxLifetime: 1765000 #一个连接的生命时长（毫秒），超时而且没被使用则被释放（retired），缺省:30分钟，建议设置比数据库超时时长少30秒以上
        maximumPoolSize: 20 #连接池中允许的最大连接数。缺省值：10；推荐的公式：((core_count * 2) + effective_spindle_count)
        minimumIdle:  1 #连接池中允许的最小空闲连接数
  cache:
     type: guava
     cache-names: merchantDetail,selConfig
     guava:
         spec: maximumSize=500,expireAfterWrite=5m

  #模版引擎
  thymeleaf:
    cache: false
    prefix: classpath:/templates/
    suffix: .html
    encoding: UTF-8

#mybatis
mybatis:
  mapperLocations: classpath*:com/zhx/*/*/mapper/*Mapper.xml
  typeAliasesPackage: com.zhx.web
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl



eureka:
  client:
    # 开启健康检查（需要spring-boot-starter-actuator依赖）
    healthcheck:
      enabled: true
    serviceUrl:
      #defaultZone: http://127.0.0.1:9700/eureka/,http://127.0.0.1:9600/eureka/,http://127.0.0.1:9500/eureka/ 可以配置多个eureka节点
      defaultZone: http://admin:123456@127.0.0.1:9800/eureka/
  instance:
    #启用Ip注册
    preferIpAddress: true
    instance-id: ${spring.cloud.client.ipAddress}:${server.port}:${random.value}
    # 续约更新时间间隔（默认30秒）
    lease-renewal-interval-in-seconds: 180
    # 续约到期时间（默认90秒）
    lease-expiration-duration-in-seconds: 200

management:
  #关闭安全检测
  security:
    enabled: false
  port: ${server.port}

#监控监控信息设置为非敏感
endpoints:
  health:
    sensitive: false

security:
  basic:
    enabled: false

#配置属性
site:
  #测试
  errorNumber: 1

启动类中添加@EnableEurekaClient注解

@SpringBootApplication
@EnableCaching // 启用缓存
@EnableEurekaClient
public class Application extends WebMvcConfigurerAdapter {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
    @Autowired
    private RequestInterceptor requestInterceptor;
    
    /**
     * 配置拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(requestInterceptor).addPathPatterns("/**");
    }
}

2.配置eureka服务端

server:
  port: 9800
spring:
  application:
    name: eureka_server
eureka:
  server:
    # 设为false，关闭自我保护
    enable-self-preservation: false
    # 清理间隔（单位毫秒，默认是60*1000）
    eviction-interval-timer-in-ms: 15000

  client:
    registerWithEureka: true
    fetchRegistry: true
    service-url:
      defaultZone: http://${security.user.name}:${security.user.password}@xxxx:8081/eureka/,http://${security.user.name}:${security.user.password}@xxx:9600/eureka/
#      defaultZone: http://localhost:8762/eureka/ 部署eureka服务的节点ip

  instance:
      #启用Ip注册
      preferIpAddress: true
      instance-id: ${spring.cloud.client.ipAddress}:${server.port}:${random.value}
      # 续约更新时间间隔（默认30秒）
      lease-renewal-interval-in-seconds: 10
      # 续约到期时间（默认90秒）
      lease-expiration-duration-in-seconds: 20

management:
  #关闭安全检测
  security:
    enabled: false
  port: ${server.port}


endpoints:
  health:
    sensitive: false

security:
  basic:
    enabled: true
  user: #eureka登录账号密码
    name: admin
    password: 123456

pom文件添加eureka-server依赖

 <!--增加eureka-server的依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>

eureka-server启动类

@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}

3.zuul做负载均衡

spring:
  application:
    name: zuul_server
server:
  port: 8080

zuul:
  routes:
    #服务端负载均衡配置

    coreapiread:
      path: /coreapiread/**
      stripPrefix: false
      #服务的 application.name  不能带下划线
      serviceId: coreapiread
    coreapiwrite:
      path: /coreapiwrite/**
      stripPrefix: false
      serviceId: coreapiwrite
    didiAdmin:
      path: /didi-admin/**
      stripPrefix: false
      url: http://127.0.0.1:6028
    cardmember:
      path: /cardmember/**
      stripPrefix: false
      serviceId: cardmember


  sensitive-headers:
  add-host-header: true
  add-proxy-headers: true

#超时设置
hystrix:
  command:
    default:
      execution:
        timeout:
          enabled: true
        isolation:
          thread:
            timeoutInMilliseconds: 20000
ribbon:
  ReadTimeout: 20000
  ConnectTimeout: 20000
  MaxAutoRetries: 0
  MaxAutoRetriesNextServer: 1

eureka:
  client:
    # 开启健康检查（需要spring-boot-starter-actuator依赖）
    healthcheck:
      enabled: true
    serviceUrl:
      defaultZone: http://admin:123456@xxx:8081/eureka/,http://admin:123456@xxx:9600/eureka/
   # eureka用户名和密码
    #设置拉取服务注册信息时间，默认60s   如果要迅速获取服务注册状态，可以缩小该值
    registry-fetch-interval-seconds: 10

  instance:
    #启用Ip注册
    preferIpAddress: true
    instance-id: ${spring.cloud.client.ipAddress}:${server.port}:${random.value}
    # 续约更新时间间隔（默认30秒）
    lease-renewal-interval-in-seconds: 30
    # 续约到期时间（默认90秒）
    lease-expiration-duration-in-seconds: 90

management:
  #关闭安全检测
  security:
    enabled: false
  port: ${server.port}

security:
  basic:
    enabled: true
  user:
    name: zhx22
    password: fdg2222

#监控监控信息设置为非敏感
endpoints:
  health:
    sensitive: false

zuul启动类

@EnableEurekaClient
@EnableZuulProxy
@SpringBootApplication
public class ZuulApplication {
    public static void main(String[] args) {
        SpringApplication.run(ZuulApplication.class, args);
    }
}

pom文件

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

eureka控制台信息

进行节点移除更新时，在eureka服务所在服务器上先移除待更新节点，在kill节点服务：

移除节点
curl -u admin:123456 -X DELETE http://127.0.0.1:8081/eureka/apps/ZUUL_SERVER/127.22.2.124:10011:cf6d9fd513f57727e57c8bc213767fc3

　参数解释，curl -u eureka用户名:密码，第一个ip为eureka服务所在ip，第二个为client所在ip，最后的md5信息为eureka控制台上的节点信息；