一、从0到1搭建微服务工程

注册中心采用Eureka实现注册中心。

配置中心采用Spring

Cloud

Gateway作为网关。

服务调用采用OpenFeign实现服务之间的调用。

负载均衡采用Ribbon实现服务的负载均衡。

大致如下所示

parentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion2.3.12.RELEASE/versionrelativePath/

!--

--dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-dependencies/artifactIdversionHoxton.SR12/versiontypepom/typescopeimport/scope/dependency/dependencies

/dependencyManagementbuildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins

/build

这里采用单机的Eureka注册中心当然也可以使用集群的Eureka注册中心。

1引入依赖

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-netflix-eureka-server/artifactId

/dependency

eureka:client:register-with-eureka:

false

是否将自己注册到eureka注册中心fetch-registry:

false

org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;/***

version

{SpringApplication.run(EurekaApp.class,

args);}

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-netflix-eureka-client/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-config-server/artifactId

/dependency

cloud-config-servercloud:config:server:git:uri:

https://gitcode.net/qq_39826207/config-demo.git

username:

${spring.application.name}prefer-ip-address:

true

${spring.cloud.client.ip-address}

地址instance-id:

${spring.cloud.client.ip-address}:${server.port}

设置当前服务的实例ID采用IP端口形式client:register-with-eureka:

true

是否将自己注册到eureka注册中心fetch-registry:

true

是否从eureka注册中心获取注册信息service-url:defaultZone:

3启动类

org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.cloud.config.server.EnableConfigServer;

import

org.springframework.cloud.netflix.eureka.EnableEurekaClient;/***

version

{SpringApplication.run(ConfigApp.class,

args);}

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-netflix-eureka-client/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-gateway/artifactId

/dependency

cloud-api-gatewaycloud:gateway:#

动态服务转发discovery:locator:enabled:

true

启用动态路由服务名称转发功能lower-case-service-id:

true

${spring.application.name}prefer-ip-address:

true

${spring.cloud.client.ip-address}

地址instance-id:

${spring.cloud.client.ip-address}:${server.port}

设置当前服务的实例ID采用IP端口形式client:register-with-eureka:

true

是否将自己注册到eureka注册中心fetch-registry:

true

是否从eureka注册中心获取注册信息service-url:defaultZone:

3启动类

org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.cloud.netflix.eureka.EnableEurekaClient;/***

version

{SpringApplication.run(GatewayApp.class,

args);}

dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-netflix-eureka-client/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-config-client/artifactId

/dependency

注意这里创建的配置文件必须是【bootstrap.yml】因为需要从配置中心获取配置信息。

server:port:

开启服务发现的功能这里也就是支持eureka的功能service-id:

cloud-config-server

org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.cloud.netflix.eureka.EnableEurekaClient;/***

version

{SpringApplication.run(ProviderApp.class,

args);}

服务消费者需要调用服务提供者的接口所以这里需要引入OpenFeign组件。

1引入依赖

dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-netflix-eureka-client/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-config-client/artifactId

/dependency

dependencygroupIdorg.springframework.cloud/groupIdartifactIdspring-cloud-starter-openfeign/artifactId

/dependency

注意这里创建的配置文件必须是【bootstrap.yml】因为需要从配置中心获取配置信息。

server:port:

开启服务发现的功能这里也就是支持eureka的功能service-id:

cloud-config-server

org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.cloud.netflix.eureka.EnableEurekaClient;

import

org.springframework.cloud.openfeign.EnableFeignClients;/***

version

{SpringApplication.run(ConsumerApp.class,

args);}

依次启动Eureka注册中心、Config配置中心、Gateway网关、Consumer服务消费者、Provider服务提供者查看注册中心是否正常。

浏览器通过Gateway访问Consumer消费者工程中的接口【http://localhost:8080/biz-consumer/api/consumer/getUserInfo】注意测试接口的代码没有贴出来可以到我的代码仓库里面查看。