Consul服务注册与发现 Consul配置步骤

consul下载地址

Install | Consul | HashiCorp Developer

启动需要在 下载好的文件夹里 用cmd 运行consul agent -dev启动consul

Consul配置

配置pom

<!--SpringCloud consul config-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-consul-config</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>

新增配置bootstrap.yaml

bootstrap.yaml 是系统类配置项 它是最先配置的 优先级最高

spring:
  application:
    name: cloud-payment-service //作为加入服务中心之后这个微服务的名称
    ####Spring Cloud Consul for Service Discovery
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        service-name: ${spring.application.name}
      config:
        profile-separator: '-' # default value is ","，we update '-' //Consul k v 键值对命名规则
        format: YAML

在主启动类 添加注解

添加@EnableDiscoveryClient //启动服务发现

如果使用RestTemplate作为发起http请求的配置 需要在上面加 @LoadBalanced 启动负载均衡

@Configuration
public class RestTemplateConfig {

​    @Bean
​    @LoadBalanced
​    public RestTemplate restTemplate()
​    {
​        return new RestTemplate();
​    }
}

Consul k v 编写规则 config/微服务名称/data

Consul动态刷新

动态刷新 是改了服务配置中心 kv 里面的data后能够实时的获取变化的配置

在主启动类添加@RefreshScope //动态刷新

并在bootstrap.yaml添加

watch:
wait-time: 1

spring:
  application:
    name: cloud-payment-service
    ####Spring Cloud Consul for Service Discovery
  cloud:
    consul:
      host: localhost
      port: 8500
      discovery:
        service-name: ${spring.application.name}
      config:
        profile-separator: '-' # default value is ","，we update '-'
        format: YAML
        watch:
          wait-time: 1

ault value is “,”，we update ‘-’
format: YAML
watch:
wait-time: 1