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spring cloud 配置中心客戶端啟動(dòng)遇到的問題

更新時(shí)間：2021年09月25日 09:18:04 作者：qq_36481502

這篇文章主要介紹了spring cloud 配置中心客戶端啟動(dòng)遇到的問題，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教

spring cloud 配置中心客戶端啟動(dòng)

先啟動(dòng)了配置中心，然后啟動(dòng)客戶端，

發(fā)現(xiàn)打印的日志是這樣的

2020-04-29 11:13:02.333  INFO 1856 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:9009/
2020-04-29 11:13:08.121  INFO 1856 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=test-config, profiles=[dev], label=master, version=3eb2b779d066af89af4ba5b7a722d2189a15ffd3, state=null
2020-04-29 11:13:08.122  INFO 1856 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #1)'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #0)'}]
2020-04-29 11:13:08.127  INFO 1856 --- [           main] c.z.c.ConfigCloudClientApplication       : The following profiles are active: dev
2020-04-29 11:13:08.408  INFO 1856 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=3bad3006-6836-326e-9ae4-7b60b788ec28
2020-04-29 11:13:08.720  INFO 1856 --- [           main] c.z.c.ConfigCloudClientApplication       : Started ConfigCloudClientApplication in 7.436 seconds (JVM running for 8.236)

從日志上看，已經(jīng)獲取到了配置中心的配置，但是呢，總感覺日志不對(duì)，怎么就沒有啟動(dòng)的端口呢。

springcloud經(jīng)常會(huì)一個(gè)模塊包含另外模塊，難道web模塊沒有被 spring-cloud-starter-config 包含？

那就加入web模塊吧

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
 </dependency>

加入之后再啟動(dòng)項(xiàng)目

2020-04-29 11:20:35.379  INFO 10060 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:9009/
2020-04-29 11:20:36.849  INFO 10060 --- [           main] c.c.c.ConfigServicePropertySourceLocator : Located environment: name=test-config, profiles=[dev], label=master, version=3eb2b779d066af89af4ba5b7a722d2189a15ffd3, state=null
2020-04-29 11:20:36.850  INFO 10060 --- [           main] b.c.PropertySourceBootstrapConfiguration : Located property source: [BootstrapPropertySource {name='bootstrapProperties-configClient'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #1)'}, BootstrapPropertySource {name='bootstrapProperties-https://github.com/kzdw/springCloudConfigCenter.git/test-config.yml (document #0)'}]
2020-04-29 11:20:36.855  INFO 10060 --- [           main] c.z.c.ConfigCloudClientApplication       : The following profiles are active: dev
2020-04-29 11:20:37.278  INFO 10060 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=21eb9db3-9e16-3c20-bd81-2c0ea23b0f12
2020-04-29 11:20:37.566  INFO 10060 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8201 (http)
2020-04-29 11:20:37.574  INFO 10060 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-04-29 11:20:37.574  INFO 10060 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.33]
2020-04-29 11:20:37.684  INFO 10060 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2020-04-29 11:20:37.684  INFO 10060 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 817 ms
2020-04-29 11:20:37.851  INFO 10060 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-04-29 11:20:38.200  INFO 10060 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8201 (http) with context path ''
2020-04-29 11:20:38.285  INFO 10060 --- [           main] c.z.c.ConfigCloudClientApplication       : Started ConfigCloudClientApplication in 3.87 seconds (JVM running for 4.531)

果然，從配置中心拉取到了配置并成功啟動(dòng)了。

spring cloud配置中心客戶端配置的坑

1. 出錯(cuò)信息如下

在啟動(dòng)配置中心的客戶端時(shí)，報(bào)以下錯(cuò)誤信息：

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'foo' in value "${foo}"

2. 度娘查了下，發(fā)現(xiàn)很多人碰到這個(gè)坑

首先我提交到git上到配置文件名稱為下面兩個(gè)文件

cloud-config-dev.properties
cloud-config-test.properties

遵循配置中心配置文件的規(guī)則/{application}-{profile}.properties

所以在cloud-config-client端調(diào)用的時(shí)候，applcation.name應(yīng)該是cloud-config，然而我在配置的時(shí)候，想當(dāng)然的寫成了cloud-config-client，導(dǎo)致出現(xiàn)上面的錯(cuò)誤。