spring-cloud-microservice-examples

spring-cloud-microservice-examples

说明

目前该项目实现了 zuul(路由模块), config-server(配置管理), eureka server（服务注册和发现）, zipkin（服务调用追踪）,hystrix, turbine stream (熔断分析) simple-service,simple-serviceB两个待发现的服务 simple-ui (一个用angular写的前端页面)

路由功能实现在 cloud-api-gateway 模块，注册到eureka server上面，所有的请求访问 http://localhost:5555, 然后根据路由规则

zuul.routes.api-a.path: /cloud-simple-service/**
zuul.routes.api-a.serviceId: cloud-simple-service

zuul.routes.api-b.path: /cloud-simple-serviceB/**
zuul.routes.api-b.serviceId: cloud-simple-serviceB

zuul.routes.api-ui.path: /cloud-simple-ui/**
zuul.routes.api-ui.serviceId: cloud-simple-ui

分别请求到 注册到eureka server的cloud-simple-service 和 cloud-simple-serviceB服务。 服务的架构图:

使用指南

• 先决条件 本机安装rabbitmq,并启动

rabbitmq-server

本机安装mysql,并启动且创建dev和test数据库,并分别创建表

mysql.server start
mysql -uroot
  CREATE TABLE `user` (
`id` int(11) NOT NULL,
`username` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8
 dev数据库的user表中插入数据
 INSERT INTO `user` VALUES (1,'dev1'),(2,'dev2'),(3,'dev3');
 test数据库的user表中插入数据
 INSERT INTO `user` VALUES (1,'test1'),(2,'test2'),(3,'test3');

• 运行各模块

cd cloud-api-gateway
mvn spring-boot:run  #端口5555
cd cloud-config-server
mvn spring-boot:run  #端口8888
cd cloud-eureka-server
mvn spring-boot:run  #端口8761
cd cloud-simple-service
mvn spring-boot:run  #端口8081
cd cloud-simple-service
mvn spring-boot:run --server.port=8082  # cloud-simple-service 以8082端口再次启动服务
cd cloud-simple-ui
mvn spring-boot:run #端口8090
cd cloud-zipkin
mvn spring-boot:run #端口9966

• 打开浏览器输入网址并浏览效果

 查看Eureka Server
 http://localhost:8761 #查看eureka

请求simple service, simple service2, simple serviceB
http://localhost:8081/user  #simple service
结果:
[
  {
      id: 1,
      username: "dev1"
  },
  {
      id: 2,
      username: "dev2"
  },
  {
      id: 3,
      username: "dev3"
  }
]
http://localhost:8082/user  #simple service2
结果:
[
  {
      id: 1,
      username: "dev1"
  },
  {
      id: 2,
      username: "dev1"
  },
  {
      id: 3,
      username: "dev1"
  }
]
http://localhost:8091/user  #simple serviceB
结果:
Result from simpleserviceB

本项目实现了通过spring-cloud-bus, 传播config-server中config的变化.下面动手验证之.

1. 下载配置git repository git clone [email protected]:zpng/spring-cloud-config-demo.git 根目录下有个cloud-config-repo目录,该目录下有两个文件: cloud-simple-service-dev.properties cloud-simple-service-test.properties 分别是cloud-simple-service在 dev和test环境下的配置信息 cloud-simple-service-dev.properties内容: ``` mysqldb.datasource.url=jdbc:mysql://localhost:3306/dev?useUnicode=true&characterEncoding=utf-8

mysqldb.datasource.username=root

mysqldb.datasource.password=

logging.level.org.springframework.web:DEBUG

```
cloud-simple-service-test.properties内容:
```
mysqldb.datasource.url=jdbc\:mysql\://localhost\:3306/test?useUnicode\=true&characterEncoding\=utf-8

mysqldb.datasource.username=root

mysqldb.datasource.password=

logging.level.org.springframework.web:DEBUG
```

1. 修改 cloud-simple-service-dev.properties 内容,

 mysql url中使用的dev数据库变为test数据库
  mysqldb.datasource.url=jdbc\:mysql\://localhost\:3306/dev?useUnicode\=true&characterEncoding\=utf-8
  ->
  mysqldb.datasource.url=jdbc\:mysql\://localhost\:3306/test?useUnicode\=true&characterEncoding\=utf-8

  git add -A
  git commit -m "MOD: update config"
  git push origin master  #将修改push到git repositoy

1. 此时并需要重启config-server或者simple-service,只需要发送一个POST请求到config-server,并通过bus传播到使用该配置文件的服务中. curl -X POST http://localhost:8888/bus/refresh #(config-server启动在8888端口) 此时刷新前端页面 http://localhost:8081/user #simple service http://localhost:8082/user #simple service2 发现数据都已变成: [ { id: 1, username: "test1" }, { id: 2, username: "test2" }, { id: 3, username: "test3" } ] --- 1. 验证路由逻辑 cloud-api-gateway服务使用了zuul进行请求转发,转发规则如下: ``` # routes to serviceId zuul.routes.api-a.path: /cloud-simple-service/** zuul.routes.api-a.serviceId: cloud-simple-service

zuul.routes.api-b.path: /cloud-simple-serviceB/**
zuul.routes.api-b.serviceId: cloud-simple-serviceB

zuul.routes.api-ui.path: /cloud-simple-ui/**
zuul.routes.api-ui.serviceId: cloud-simple-ui
```
并且zuul服务中进行了token验证,需要请求参数中包含accessToken,accessToken可以为任意值,如果不包含该参数则请求不能
转发过去.
```
http://localhost:5555/cloud-simple-ui/users?accessToken=test
结果:
[
    {
        id: 1,
        username: "test1"
    },
    {
        id: 2,
        username: "test2"
    },
    {
        id: 3,
        username: "test3"
    }
]

http://localhost:5555/cloud-simple-serviceB/user?accessToken=tbbsxxxxd
结果: Result from simpleserviceB
http://localhost:5555/cloud-simple-service/user?accessToken=xxxdaew
结果:
[
    {
        id: 1,
        username: "test1"
    },
    {
        id: 2,
        username: "test2"
    },
    {
        id: 3,
        username: "test3"
    }
]
```
可见zuul已经完全发挥了它的路由作用.

1. Hystrix Hystrix是熔断器, Hystrx Dashboard实现了监控单个Hystrix stream的功能. http://localhost:8022/hystrix/ 打开后页面如下: 在其中输入 http://localhost:8090/hystrix.stream (cloud-simple-ui服务),即可监控该服务的stream,如下图 注意需要请求几次cloud-simple-ui服务,该图上才会有结果.

2. Turbine 本示例使用了turbine-amqp, 然后各个需要统计hystrix stream的微服务,包含依赖 <!--for turbine stream--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-hystrix-stream</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-stream-rabbit</artifactId> </dependency> 即可将stream 发送到rabbitmq队列,然后turbine stream项目获取这些stream, 然后显示在图示上,这样跟之前的区别是可以监控所有 的微服务,而不是单个主机的stream. 同样打开 http://localhost:8022/hystrix/ 在其中输入 http://localhost:8989/turbine.stream 则可以看到如下图所示 如图所示可以看到 cloud-simple-service, cloud-simple-serviceB, cloud-simple-ui 共3个服务的Hystrix Stream.

3. Zipkin zipkin可以跟踪微服务的调用以及,各个路径上面的时间,进而分析瓶颈. 打开 http://localhost:9966

trace如下图: dependencies如下图: