spring-cloud eureka 注册中心

eureka server 配置

1.Maven 导入

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

2.增加 Application.java 注解 @EnableEurekaServer

3.配置 properties

# 服务器端口
server.port = 9090
# 应用名称
spring.application.name = eureka.server
# 取消服务器自我注册
eureka.client.register-with-eureka = false
# 不检索服务[本身为服务器,所以不需要检索]
eureka.client.fetch-registry = false
# eureka server 服务url , 用于客户端注册
eureka.client.service-url.defaultZone = http://localhost:${server.port}/eureka
​

@ 双节点 server

配置 properties

# 服务器端口
server.port = 9090
# 应用名称
spring.application.name = eureka.server
# 因为需要向另一个eureka server注册,所以开启
eureka.client.register-with-eureka = true
# 需要检索另一个eureka server
eureka.client.fetch-registry = true
# 配置另一个eureka server的服务地址
eureka.client.service-url.defaultZone = \
	http://{other server host}:${server.port}/eureka
​

注意 : 双节点 eureka.client.service-url.defaultZone 互相配置,多节点配置以 , 分隔,配置其他 eureka server 地址即可

eureka client producer 配置

1.Maven 导入

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

2.增加 Application.java 注解 @EnableDiscoveryClient

3.配置 properties

# 服务器端口
server.port = 8080
# 应用名称
spring.application.name = eureka.client.producer
# eureka server 服务url , 用于客户端注册
eureka.client.service-url.defaultZone = http://localhost:9090/eureka
​

4.增加暴露 rest url 的 controller

@RestController
public class HelloController {

    @RequestMapping("/producer/hello")
    public String index(@RequestParam String name) {
        return "hello "+name+"，this is first messge";
    }
}
​

eureka client consumer 配置

1.Maven 导入

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
​

2.增加 Application.java 注解

@EnableDiscoveryClient
@EnableFeignClients
​

3.配置 properties

# 服务器端口
server.port = 7070
# 应用名称
spring.application.name = eureka.client.consumer
# eureka server 服务url , 用于客户端注册
eureka.client.service-url.defaultZone = http://localhost:9090/eureka
​

4.增加接口

@FeignClient("eureka.client.producer") //要与producer的spring.application名称保持一致
public interface HelloRemote {
    @RequestMapping(value = "/producer/hello") //要与producer暴露的url一致
    String hello(@RequestParam(value = "name") String name);
}
​

5.增加调用 producer 的 controller

@RestController
public class ConsumerController {

    @Autowired
    public HelloRemote HelloRemote;

    @RequestMapping("/hello/{name}")
    public String index(@PathVariable("name") String name) {
        return HelloRemote.hello(name);
    }

}
​