微服务-注册中心与网关 学习完引出来新的问题：配置太多，无法统一管理

现在用nacos来管理看看

1. 环境

中间件	作用	备考
nacos	配置中心	简单安装方式

2. 配置中心（nacos）

应用nacos-group：github.com/nacos-group…

2.1 下载 nacos-docker

2.2 安装集群环境

nacos> docker-compose -f example/cluster-hostname.yaml up -d
Creating network "example_default" with the default driver
Creating mysql ... done
Creating nacos2 ... done
Creating nacos1 ... done
Creating nacos3 ... done

2.3 查看一下管理平台

3. 配置中心

3.1 首先构建开发环境(dev)和生产环境(prd)命名空间

3.2 其次把之前的配置存在这里

3.3 代码层的修改（spring-cloud-provider）

pom.xml中追加如下依赖

......
		<dependency>
			<groupId>com.alibaba.boot</groupId>
			<artifactId>nacos-config-spring-boot-starter</artifactId>
			<version>0.2.7</version>
		</dependency>
.....

启动类 SpringCloudProviderApplication.java

package com.cloud.provider;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import com.alibaba.nacos.spring.context.annotation.config.NacosPropertySource;

@SpringBootApplication
//支持服务发现
@EnableDiscoveryClient
//支持配置中心
@NacosPropertySource(dataId="spring-cloud-provider-01.properties", autoRefreshed = true, groupId = "USER_GROUP")
public class SpringCloudProviderApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringCloudProviderApplication.class, args);
	}

}

@NacosPropertySource(dataId="spring-cloud-provider-01.properties", autoRefreshed = true, groupId = "USER_GROUP") 这里要和3.2 的内容匹配起来

配置文件

application-dev.properties

# nacos认证信息
spring.cloud.nacos.config.username=nacos
spring.cloud.nacos.config.password=nacos
#spring.cloud.nacos.config.contextPath=/nacos
spring.cloud.nacos.config.namespace=e5c3cda1-52a5-4328-a21c-f556ebe0d20f

# ----------配置中心，如果无需使用配置中心，可以删除此部分配置----------
# 设置配置中心服务端地址
spring.cloud.nacos.config.server-addr= localhost:8848

application-prd.properties

# nacos认证信息
spring.cloud.nacos.config.username=nacos
spring.cloud.nacos.config.password=nacos
#spring.cloud.nacos.config.contextPath=/nacos
spring.cloud.nacos.config.namespace=41435ed9-0edf-4c44-aaf6-727b67816681

# ----------配置中心，如果无需使用配置中心，可以删除此部分配置----------
# 设置配置中心服务端地址
spring.cloud.nacos.config.server-addr= localhost:8848

这部分只需与nacos的命名空间及server地址对应起来就可以

3.4 启动服务看看

3.4.1 IDE环境

启动日志如下：

2021-02-20 23:34:31.078  INFO 13740 --- [  restartedMain] c.a.b.n.c.u.NacosConfigPropertiesUtils   : nacosConfigProperties : NacosConfigProperties{serverAddr='127.0.0.1:8848', contextPath='null', encode='null', endpoint='null', namespace='null', accessKey='null', secretKey='null', ramRoleName='null', autoRefresh=false, dataId='null', dataIds='null', group='DEFAULT_GROUP', type=null, maxRetry='null', configLongPollTimeout='null', configRetryTime='null', enableRemoteSyncConfig=false, extConfig=[], bootstrap=Bootstrap{enable=false, logEnable=false}}
2021-02-20 23:34:31.081  INFO 13740 --- [  restartedMain] NacosConfigApplicationContextInitializer : [Nacos Config Boot] : The preload configuration is not enabled
2021-02-20 23:34:31.128  INFO 13740 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-02-20 23:34:31.286  INFO 13740 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$9a5367b7] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.1.8.RELEASE)

2021-02-20 23:34:33.374  INFO 13740 --- [  restartedMain] c.a.b.n.c.u.NacosConfigPropertiesUtils   : nacosConfigProperties : NacosConfigProperties{serverAddr='127.0.0.1:8848', contextPath='null', encode='null', endpoint='null', namespace='null', accessKey='null', secretKey='null', ramRoleName='null', autoRefresh=false, dataId='null', dataIds='null', group='DEFAULT_GROUP', type=null, maxRetry='null', configLongPollTimeout='null', configRetryTime='null', enableRemoteSyncConfig=false, extConfig=[], bootstrap=Bootstrap{enable=false, logEnable=false}}
2021-02-20 23:34:33.374  INFO 13740 --- [  restartedMain] NacosConfigApplicationContextInitializer : [Nacos Config Boot] : The preload configuration is not enabled
2021-02-20 23:34:33.374  INFO 13740 --- [  restartedMain] c.c.p.SpringCloudProviderApplication     : The following profiles are active: dev
2021-02-20 23:34:34.120  WARN 13740 --- [  restartedMain] o.s.boot.actuate.endpoint.EndpointId     : Endpoint ID 'service-registry' contains invalid characters, please migrate to a valid format.
2021-02-20 23:34:34.247  INFO 13740 --- [  restartedMain] o.s.cloud.context.scope.GenericScope     : BeanFactory id=469cb250-9045-3f94-b685-af5a683c222c
2021-02-20 23:34:34.320  INFO 13740 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$9a5367b7] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-02-20 23:34:34.722  INFO 13740 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 9001 (http)
2021-02-20 23:34:34.737  INFO 13740 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2021-02-20 23:34:34.737  INFO 13740 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.24]
2021-02-20 23:34:34.901  INFO 13740 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2021-02-20 23:34:34.901  INFO 13740 --- [  restartedMain] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1516 ms
2021-02-20 23:34:35.026  WARN 13740 --- [  restartedMain] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2021-02-20 23:34:35.026  INFO 13740 --- [  restartedMain] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2021-02-20 23:34:35.030  INFO 13740 --- [  restartedMain] c.netflix.config.DynamicPropertyFactory  : DynamicPropertyFactory is initialized with configuration sources: com.netflix.config.ConcurrentCompositeConfiguration@4f1ceb40
2021-02-20 23:34:38.390  INFO 13740 --- [  restartedMain] o.s.cloud.commons.util.InetUtils         : Cannot determine local hostname
2021-02-20 23:34:38.629  WARN 13740 --- [  restartedMain] c.n.c.sources.URLConfigurationSource     : No URLs will be polled as dynamic configuration sources.
2021-02-20 23:34:38.629  INFO 13740 --- [  restartedMain] c.n.c.sources.URLConfigurationSource     : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2021-02-20 23:34:38.829  INFO 13740 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2021-02-20 23:34:39.208  INFO 13740 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2021-02-20 23:34:41.219  INFO 13740 --- [  restartedMain] o.s.cloud.commons.util.InetUtils         : Cannot determine local hostname
2021-02-20 23:34:41.324  INFO 13740 --- [  restartedMain] o.s.s.c.ThreadPoolTaskScheduler          : Initializing ExecutorService 'catalogWatchTaskScheduler'
2021-02-20 23:34:41.339  INFO 13740 --- [  restartedMain] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 2 endpoint(s) beneath base path '/actuator'
2021-02-20 23:34:41.373  INFO 13740 --- [on(2)-127.0.0.1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-02-20 23:34:41.374  INFO 13740 --- [on(2)-127.0.0.1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2021-02-20 23:34:41.390  INFO 13740 --- [on(2)-127.0.0.1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 16 ms
2021-02-20 23:34:41.420  INFO 13740 --- [  restartedMain] .LoggingNacosConfigMetadataEventListener : Nacos Config Metadata : dataId='spring-cloud-provider-01.properties', groupId='USER_GROUP', beanName='springCloudProviderApplication', bean='null', beanType='class com.cloud.provider.SpringCloudProviderApplication', annotatedElement='null', xmlResource='null', nacosProperties='{maxRetry=${nacos.config.maxRetry${nacos.maxRetry:}}, configRetryTime=${nacos.config.configRetryTime${nacos.configRetryTime:}}, serverAddr=127.0.0.1:8848, encode=UTF-8, configLongPollTimeout=${nacos.config.configLongPollTimeout${nacos.configLongPollTimeout:}}, enableRemoteSyncConfig=false}', nacosPropertiesAttributes='{encode=${nacos.encode:UTF-8}, namespace=${nacos.namespace:}, enableRemoteSyncConfig=${nacos.enableRemoteSyncConfig:}, configLongPollTimeout=${nacos.configLongPollTimeout:}, serverAddr=${nacos.server-addr:}, secretKey=${nacos.secret-key:}, configRetryTime=${nacos.configRetryTime:}, maxRetry=${nacos.maxRetry:}, username=${nacos.username:}, contextPath=${nacos.context-path:}, endpoint=${nacos.endpoint:}, password=${nacos.password:}, accessKey=${nacos.access-key:}, clusterName=${nacos.cluster-name:}}', source='org.springframework.core.type.StandardAnnotationMetadata@2a8725ac', timestamp='1613831673959'
2021-02-20 23:34:41.452  INFO 13740 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 9001 (http) with context path ''
2021-02-20 23:34:41.459  INFO 13740 --- [  restartedMain] o.s.c.c.s.ConsulServiceRegistry          : Registering service with consul: NewService{id='spring-cloud-provider-01-9001', name='service-provider', tags=[secure=false], address='192.168.8.1', meta=null, port=9001, enableTagOverride=null, check=Check{script='null', interval='10s', ttl='null', http='http://192.168.8.1:9001/actuator/health', method='null', header={}, tcp='null', timeout='null', deregisterCriticalServiceAfter='null', tlsSkipVerify=null, status='null'}, checks=null}
2021-02-20 23:34:43.453  INFO 13740 --- [  restartedMain] o.s.cloud.commons.util.InetUtils         : Cannot determine local hostname
2021-02-20 23:34:43.455  INFO 13740 --- [  restartedMain] c.c.p.SpringCloudProviderApplication     : Started SpringCloudProviderApplication in 14.651 seconds (JVM running for 15.891)

3.4.2 查看Consul

3.4.3 浏览器访问

3.5 命令行访问方式

命令行

java -jar spring-cloud-provider-0.0.1-SNAPSHOT.jar --spring.profiles.active=prod

gitee：gitee.com/actual-comb…

4 结论

所有微服务只需连接配置中心就可

切换环境也很便捷：-Dspring.profiles.active=[环境变量]

以前管理混乱的Spring老大难的配置问题就这样解决了