Spring Cloud-Bus(十二)

说明

用于分布式上所有微服务都连接到消息总线上面。进行统一的通知

Config动态刷新

configClient

configClient通过/actuator/bus-refresh端点通知消息总线 消息总线通知线上的所有服务实例 调用/actuator/refresh端点进行配置更新

configClient改造

1.增加bus pom依赖

 <!--根据消息总线实现所有服务配置刷新-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>

2.配置文件增加mq信息

spring:
  rabbitmq:   #更多mq配置看书331页
    username: liqiang
    password: liqiang
    host: localhost
    port: 5672

3.配置文件增加bus端点

management:
  endpoints:
    web:
      exposure:
        include: refresh,bus-refresh

4.完整配置文件

spring:
  application:
    name: config #对应{application}
  cloud:
    config:
      profile: dev #映射{profile}
      label: master #映射{label}
      #uri: http://127.0.0.1:7001 #config server地址
      username: liqiang #configserver身份认证用户名
      password: liqiang #configserver身份认证密码
      discovery:
        service-id: CONFIG-SERVER #configserver的服务名
        enabled: true #开启通过服务访问configserver的功能
      fail-fast: true #快速响应spring.cloud.config.fail-fast=true
      retry:
        multiplier: 1.1 #默认间隔乘数  如果间隔是1000  下一次间隔是1100
        max-interval: 2000 #默认最大间隔数(毫秒)
        max-attempts: 6 #默认重试次数
        initial-interval: 1000 #默认间隔数
  rabbitmq:   #更多mq配置看书331页
    username: liqiang
    password: liqiang
    host: localhost
    port: 5672
server:
  port: 7002
eureka:
  instance:
    hostname: localhost #当前实例的主机名字
  client:
    serviceUrl:
      defaultZone: http://peer1:1111/eureka/, http://peer2:1112/eureka/
#http://127.0.0.1:7002/actuator/refresh
management:
  endpoints:
    web:
      exposure:
        include: refresh,bus-refresh

5.复制2个配置文件 分别命名为peer1和peer2并且将端口改为不一致

6.将client instail打包

8.执行eurekaserver    config-server    通过命令启动2个client

java -jar /Users/liqiang/Desktop/java开发环境/mavenRegitstory/com/liqiang/spring-cloud-config-client/0.0.1-SNAPSHOT/spring-cloud-config-client-0.0.1-SNAPSHOT.jar --spring.profiles.active=peer1
java -jar /Users/liqiang/Desktop/java开发环境/mavenRegitstory/com/liqiang/spring-cloud-config-client/0.0.1-SNAPSHOT/spring-cloud-config-client-0.0.1-SNAPSHOT.jar --spring.profiles.active=peer2

9.测试

post请求http://127.0.0.1:7003/actuator/bus-refresh 测试没通过 只有7003实现了刷新

PS:最终测试时版本文本 不确定是版本差异还是bug 修改版本 重新测试

   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <!--<version>2.1.0.RELEASE</version>-->
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <!--<spring-cloud.version>Greenwich.M3</spring-cloud.version>-->
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

10.修改git 77777为88888

posman访问http://localhost:7002/actuator/bus-refresh

可以看到总线上的7003服务 也刷新了

configServer

我们可以发现 通知总线上所有实例刷新配置由configServer来负责会更合理

1.configServer增加pom依赖

 <!--根据消息总线实现所有服务配置刷新-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>

2.配置文件增加mq以及端点

spring:
  rabbitmq:   #更多mq配置看书331页
    username: liqiang
    password: liqiang
    host: localhost
    port: 5672
management:
  endpoints:
    web:
      exposure:
        include: health,info,bus-refresh

3.刷新配置改为访问server的/actuator/bus-refresh 就可以了

指定服务刷新

http://localhost:7001/actuator/bus-refresh?destination=CONFIG:7002  为服务名字为config同时端口为7002的刷新

ps:没测试通过应该改为

http://localhost:7001/actuator/bus-refresh/config:7002 刷新名为config 同时端口为7002的服务

http://localhost:7001/actuator/bus-refresh/config:** 为刷新名为config的所有服务

事件跟踪

1.设置spring.cloud.bus.trace.enabled=true

2开启端点httptrace

management:
  endpoints:
    web:
      exposure:
        include: health,info,bus-refresh,httptrace,trace

3.访问http://localhost:7001/actuator/bus-refresh

4.再访问http://127.0.0.1:7001/actuator/httptrace

5.跟老版本的/trace地址不一样输出内容也不一样感觉不利于分析

{
    "traces": [{
        "timestamp": "2019-01-23T00:51:47.346Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "POST",
            "uri": "http://localhost:7001/actuator/bus-refresh",
            "headers": {
                "content-type": ["application/json"],
                "cache-control": ["no-cache"],
                "postman-token": ["bfe920e9-66fb-42bf-b36f-13d577b9fab7"],
                "user-agent": ["PostmanRuntime/7.4.0"],
                "accept": ["*/*"],
                "host": ["localhost:7001"],
                "accept-encoding": ["gzip, deflate"],
                "content-length": ["0"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 204,
            "headers": {}
        },
        "timeTaken": 3296
    }, {
        "timestamp": "2019-01-23T00:51:49.725Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://localhost:7001/config/dev/master",
            "headers": {
                "accept": ["application/xml, text/xml, application/json, application/*+xml, application/*+json"],
                "user-agent": ["Java/1.8.0_181"],
                "host": ["localhost:7001"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/xml;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:51:49 GMT"]
            }
        },
        "timeTaken": 58
    }, {
        "timestamp": "2019-01-23T00:51:49.621Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://localhost:7001/config/dev/master",
            "headers": {
                "accept": ["application/xml, text/xml, application/json, application/*+xml, application/*+json"],
                "user-agent": ["Java/1.8.0_181"],
                "host": ["localhost:7001"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/xml;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:51:49 GMT"]
            }
        },
        "timeTaken": 104
    }, {
        "timestamp": "2019-01-23T00:49:59.062Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "POST",
            "uri": "http://localhost:7001/actuator/bus-refresh",
            "headers": {
                "content-type": ["application/json"],
                "cache-control": ["no-cache"],
                "postman-token": ["470bc387-8f9b-4ddd-8655-66de72970a84"],
                "user-agent": ["PostmanRuntime/7.4.0"],
                "accept": ["*/*"],
                "host": ["localhost:7001"],
                "accept-encoding": ["gzip, deflate"],
                "content-length": ["0"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 204,
            "headers": {}
        },
        "timeTaken": 3517
    }, {
        "timestamp": "2019-01-23T00:50:02.173Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://127.0.0.1:7001/actuator/httptrace",
            "headers": {
                "host": ["127.0.0.1:7001"],
                "connection": ["keep-alive"],
                "cache-control": ["max-age=0"],
                "upgrade-insecure-requests": ["1"],
                "user-agent": ["Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.116"],
                "accept": ["text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"],
                "accept-encoding": ["gzip, deflate, br"],
                "accept-language": ["zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7"],
                "cookie": ["JSESSIONID=6369DFBED3CE1C799C4FC36E246CE502; CURRENT_COOKIE=84822DAAAAE4F96E04CBDE51132D0CCE"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/vnd.spring-boot.actuator.v2+json;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:50:01 GMT"]
            }
        },
        "timeTaken": 4
    }, {
        "timestamp": "2019-01-23T00:50:01.319Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://localhost:7001/config/dev/master",
            "headers": {
                "accept": ["application/xml, text/xml, application/json, application/*+xml, application/*+json"],
                "user-agent": ["Java/1.8.0_181"],
                "host": ["localhost:7001"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/xml;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:50:01 GMT"]
            }
        },
        "timeTaken": 39
    }, {
        "timestamp": "2019-01-23T00:50:01.125Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://localhost:7001/config/dev/master",
            "headers": {
                "accept": ["application/xml, text/xml, application/json, application/*+xml, application/*+json"],
                "user-agent": ["Java/1.8.0_181"],
                "host": ["localhost:7001"],
                "connection": ["keep-alive"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/xml;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:50:01 GMT"]
            }
        },
        "timeTaken": 86
    }, {
        "timestamp": "2019-01-23T00:49:53.411Z",
        "principal": null,
        "session": null,
        "request": {
            "method": "GET",
            "uri": "http://127.0.0.1:7001/actuator/httptrace",
            "headers": {
                "host": ["127.0.0.1:7001"],
                "connection": ["keep-alive"],
                "cache-control": ["max-age=0"],
                "upgrade-insecure-requests": ["1"],
                "user-agent": ["Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.116"],
                "accept": ["text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"],
                "accept-encoding": ["gzip, deflate, br"],
                "accept-language": ["zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7"],
                "cookie": ["JSESSIONID=6369DFBED3CE1C799C4FC36E246CE502; CURRENT_COOKIE=84822DAAAAE4F96E04CBDE51132D0CCE"]
            },
            "remoteAddress": null
        },
        "response": {
            "status": 200,
            "headers": {
                "Content-Type": ["application/vnd.spring-boot.actuator.v2+json;charset=UTF-8"],
                "Transfer-Encoding": ["chunked"],
                "Date": ["Wed, 23 Jan 2019 00:49:53 GMT"]
            }
        },
        "timeTaken": 52
    }]
}

源码分析

事件跟踪跟书上不一样 所以暂时止步