windows下安装consul、springboot整合consul

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Spring Cloud Consul通过自动配置和绑定到Spring Environment和其他Spring编程模型习语,为Spring Boot应用程序提供Consul集成。通过一些简单的注解,可以快速启用和配置应用程序内的常用模式,并使用Hashicorp的Consul构建大型分布式系统。提供的模式包括服务发现、分布式配置和控制总线。

接下来这篇文章就介绍一下怎么使用consul来搭建一个集成了注册中心和配置中心服务,类似于nacos:nacos作为注册中心和配置中心

目录

1、初步学习并安装consul

第一步:进入spring官网:https://spring.io/

第二步:依次点击Projects >> Spring Cloud

第三步:找到并点击spring coud consul

第四步:安装consul

第五步、访问consul控制台

2、springboot整合consul

一、注册到consul

二、从consul拉取配置


1、初步学习并安装consul

第一步:进入spring官网:https://spring.io/

第二步:依次点击Projects >> Spring Cloud

windows下安装consul、springboot整合consul,consul,spring boot

第三步:找到并点击spring coud consul

windows下安装consul、springboot整合consul,consul,spring boot

然后看一下consul的特性

- 服务注册与发现

- 支持ribbon客户端负载均衡器

- 支持zuul网关服务

- 通过key/value存储实现分布式配置

- 控制总线

Spring Cloud Consul features:

  • Service Discovery: instances can be registered with the Consul agent and clients can discover the instances using Spring-managed beans

  • Supports Ribbon, the client side load-balancer via Spring Cloud Netflix

  • Supports Spring Cloud LoadBalancer - a client side load-balancer provided by the Spring Cloud project

  • Supports Zuul, a dynamic router and filter via Spring Cloud Netflix

  • Distributed Configuration: using the Consul Key/Value store

  • Control Bus: Distributed control events using Consul Events

第四步:安装consul

要使用consul,首先要先安装consul,安装consul很简单,下载consul.exe然后在命令窗口运行起来。

上一张图片的页面拉到最下面,点击蓝色链接进入consul官网

windows下安装consul、springboot整合consul,consul,spring boot

在consul官网的页面,找到并点击install。

windows下安装consul、springboot整合consul,consul,spring boot

点击install后跳转到的consul安装的页面

切换到windows,然后找到Binary download for Windows下面的download链接,点击下载consul。

windows下安装consul、springboot整合consul,consul,spring boot

下载完成后,会得到一个压缩文件,里面只有一个.exe的可运行文件(果然如传说的一样ovo)。

解压这个压缩文件,把解压得到的sonsul.exe复制到D盘program目录下,然后在当前目录的地址输入cmd打开命令窗口,输入以下命令之一。

consul agent -dev # 以开发模式运行

consul agent -server # 以服务器模式运行

第五步、访问consul控制台

然后在浏览器的地址栏输入localhost:8500,即可访问consul的控制台了。

windows下安装consul、springboot整合consul,consul,spring boot

前面的consul特性的特性有一条,通过key/value存储来实现分布式配置,我们点击一下左边菜单栏的Key/Value,然后点击右上角的create按钮。

windows下安装consul、springboot整合consul,consul,spring boot

然后我们看到

windows下安装consul、springboot整合consul,consul,spring boot

存储配置文件时,其实这里的key就是我们的配置文件的文件名,当然也可以存字符串和其他的数据。

2、springboot整合consul

好了,接下来进入这篇文章最重要的部分,springboot整合consul

首先,创建一个springboot项目,就叫consul

一、注册到consul

修改application.yml配置文件

spring:
  application:
    name: consul
  cloud :
    consul :
      port: 8500
      host: localhost
      discovery:
        enabled: true
        register: true
        hostname: localhost
        health-check-critical-timeout: 30s
        service-name: ${spring.application.name}
        instance-id: ${spring.application.name}:${server.port}
server:
  port: 8080

注意,这里不能设置profiles,否则启动时会报错

spring:
  profiles: dev # 这个代码加了会报错
  application:
    name: consul
  cloud :
    consul :
      port: 8500
      host: localhost
      discovery:
        enabled: true
        register: true
        hostname: localhost
        health-check-critical-timeout: 30s
        service-name: ${spring.application.name}
        # instance-id: ${spring.application.name}:${server.port}
server:
  port: 8080
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jmxMBeanExporter' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/jmx/JmxEndpointAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.jmx.JmxEndpointExporter]: Factory method 'jmxMBeanExporter' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.client.serviceregistry.ServiceRegistryAutoConfiguration$ServiceRegistryEndpointConfiguration': Unsatisfied dependency expressed through field 'registration'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consulRegistration' defined in class path resource [org/springframework/cloud/consul/serviceregistry/ConsulAutoServiceRegistrationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration]: Factory method 'consulRegistration' threw exception; nested exception is java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:635) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at com.example.consul.ConsulApplication.main(ConsulApplication.java:18) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.jmx.JmxEndpointExporter]: Factory method 'jmxMBeanExporter' threw exception; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.client.serviceregistry.ServiceRegistryAutoConfiguration$ServiceRegistryEndpointConfiguration': Unsatisfied dependency expressed through field 'registration'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consulRegistration' defined in class path resource [org/springframework/cloud/consul/serviceregistry/ConsulAutoServiceRegistrationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration]: Factory method 'consulRegistration' threw exception; nested exception is java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	... 20 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.cloud.client.serviceregistry.ServiceRegistryAutoConfiguration$ServiceRegistryEndpointConfiguration': Unsatisfied dependency expressed through field 'registration'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consulRegistration' defined in class path resource [org/springframework/cloud/consul/serviceregistry/ConsulAutoServiceRegistrationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration]: Factory method 'consulRegistration' threw exception; nested exception is java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1420) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:408) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.lambda$createEndpointBean$1(EndpointDiscoverer.java:145) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer$EndpointBean.getBean(EndpointDiscoverer.java:469) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.getFilterEndpoint(EndpointDiscoverer.java:329) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.isFilterMatch(EndpointDiscoverer.java:317) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.isEndpointFiltered(EndpointDiscoverer.java:292) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.isEndpointExposed(EndpointDiscoverer.java:265) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.convertToEndpoints(EndpointDiscoverer.java:181) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.discoverEndpoints(EndpointDiscoverer.java:125) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.endpoint.annotation.EndpointDiscoverer.getEndpoints(EndpointDiscoverer.java:117) ~[spring-boot-actuator-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at org.springframework.boot.actuate.autoconfigure.endpoint.jmx.JmxEndpointAutoConfiguration.jmxMBeanExporter(JmxEndpointAutoConfiguration.java:95) ~[spring-boot-actuator-autoconfigure-2.3.2.RELEASE.jar:2.3.2.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	... 21 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consulRegistration' defined in class path resource [org/springframework/cloud/consul/serviceregistry/ConsulAutoServiceRegistrationAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration]: Factory method 'consulRegistration' threw exception; nested exception is java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:635) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1307) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1227) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	... 55 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration]: Factory method 'consulRegistration' threw exception; nested exception is java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	... 68 common frames omitted
Caused by: java.lang.IllegalArgumentException: Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null
	at org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration.normalizeForDns(ConsulAutoRegistration.java:185) ~[spring-cloud-consul-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration.getInstanceId(ConsulAutoRegistration.java:176) ~[spring-cloud-consul-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.consul.serviceregistry.ConsulAutoRegistration.registration(ConsulAutoRegistration.java:87) ~[spring-cloud-consul-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at org.springframework.cloud.consul.serviceregistry.ConsulAutoServiceRegistrationAutoConfiguration.consulRegistration(ConsulAutoServiceRegistrationAutoConfiguration.java:82) ~[spring-cloud-consul-discovery-2.2.8.RELEASE.jar:2.2.8.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
	... 69 common frames omitted

通过debug发现最后获取到的instanceId为null,这个问题找了半天才发现原因的,注意避坑!

 Consul service ids must not be empty, must start with a letter, end with a letter or digit, and have as interior characters only letters, digits, and hyphen: null

最后启动项目,访问consul发现注册到了consul上,并且服务名为${spring.application.name}-${server.port},这也是不设置instance-id时默认的服务名。

二、从consul拉取配置

上面已经让我们的项目注册到consul了,接下来修改一下配置文件,从consul拉取配置。

spring:
  application:
    name: consul
  cloud :
    consul :
      port: 8500
      host: localhost
      discovery:
        enabled: true
        register: true
        hostname: localhost
        health-check-critical-timeout: 30s
        service-name: ${spring.application.name}
      config:
        enabled: true
        prefix: config # 配置文件所在文件夹,默认值就是config
        name: consul-dev.yaml # 配置文件名,也就是key

server:
  port: 8080

接着,在consul里创建一个config文件夹,在config文件夹下面创建一个consul-dev.yaml

user:
  name: heyunlin

注意,文件夹和文件的区别在于key的结尾有没有/

windows下安装consul、springboot整合consul,consul,spring boot

 最后,创建一个控制器,获取配置文件consul-dev.yaml中的配置

package com.example.consul.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author heyunlin
 * @version 1.0
 */
@RestController
@RequestMapping(path = "/config")
public class ConfigController {
    @Value("${user.name}")
    String username;

    @GetMapping("/username")
    public String getPort() {
       return username;
    }

}

重启项目,访问http://localhost:8080/config/username发现成功获取并返回了字符串heyunlin

windows下安装consul、springboot整合consul,consul,spring boot

至此,springboot整合consul就算完成了。文章涉及的代码已经上传到git,按需获取

consul使用案例https://gitee.com/he-yunlin/consul.git

好了,文章就分享到这里了,看完不要忘了点赞+收藏哦~文章来源地址https://www.toymoban.com/news/detail-589241.html

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