nacos配置中心无法生效问题及spring cloud2021.0.5版本nacos配置中心的使用
作者:mmseoamin日期:2023-12-05

问题描述

环境版本

2.6.13
2021.0.8
2.2.9.RELEASE

bootstrap.yaml配置:

spring:
  application:
    name: order
  cloud:
    nacos:
      config:
        name: order.yml
        group: DEV_GROUP
        server-addr: 127.0.0.1:8848
#        file-extension: yaml
        namespace: c822f776-306c-4dd2-9612-68b697e3b240
        username: nacos
        password: nacos

报错信息:

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'test' in value "${test}"
	at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:180) ~[spring-core-5.3.23.jar:5.3.23]
	at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-5.3.23.jar:5.3.23]
	at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.3.23.jar:5.3.23]
	at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.3.23.jar:5.3.23]
	at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties

问题解决

(PropertySourcesPlaceholderConfigurer.java:191) ~[spring-context-5.3.23.jar:5.3.23] at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:936) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1332) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:656) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:639) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.23.jar:5.3.23] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.23.jar:5.3.23] ... 32 common frames omitted

在nacos页面配置正确的情况下,无论如何都无法获取到配置的参数

1.修改依赖版本

Spring Cloud Alibaba Version

通过查看spring cloud alibaba的官网,发现2021.0.8版本的spring cloud不适合使用2.2.9.RELEASE版本的spring-cloud-alibaba,需要改成如下配置

org.springframework.cloud.commons.ConfigDataMissingEnvironmentPostProcessor$ImportException: No spring.config.import set
	at org.springframework.cloud.commons.ConfigDataMissingEnvironmentPostProcessor.postProcessEnvironment(ConfigDataMissingEnvironmentPostProcessor.java:82)
	at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:102)
	at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:87)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
。
。
。
。
。
Description:
No spring.config.import property has been defined
Action:
Add a spring.config.import=nacos: property to your configuration.
	If configuration is not required add spring.config.import=optional:nacos: instead.
	To disable this check, set spring.cloud.nacos.config.import-check.enabled=false.
Spring Cloud VersionSpring Boot Version

2021.0.5.0*

Spring Cloud 2021.0.5

2.6.13

2021.0.4.0

Spring Cloud 2021.0.4

2.6.11

2021.0.1.0

Spring Cloud 2021.0.1

2.6.3

2021.1

Spring Cloud 2020.0.1

2.4.2

所以将依赖版本改为如下配置

2.6.13
2021.0.5
2021.0.5.0

重启后发现依然有问题,报错如下

2.添加配置

spring:
  application:
    name: order
  cloud:
    nacos:
      config:
        group: DEV_GROUP
        server-addr: 127.0.0.1:8848
        namespace: c822f776-306c-4dd2-9612-68b697e3b240
        username: nacos
        password: nacos
      discovery:
        server-addr: 127.0.0.1:8848
  config:
    import:
      - optional:nacos:order.yml
      - optional:nacos:comm.yml?group=DEFAULT_GROUP&refreshEnabled=false

查看SpringCloud Alibaba 2021版 nacos 配置中心教程得知,在该版本下原有的nacos配置文件获取规则不再生效需要改为spring.config.import的方式来配置,此种配置方式也支持多个配置文件的获取,配置参考如下

spring cloud2021.0.5版本nacos配置中心的使用总结 

重启后程序正常运行。

# bootstrap.yml
spring:
  cloud:
    nacos:
      config:
        name: test.yml
        group: DEFAULT_GROUP
        server-addr: 127.0.0.1:8848
        extension-configs:
          - dataId: test01.yml
            group: group_01
          - dataId: test02.yml
            group: group_02
            refresh: false

原有的bootstrap.yml配置文件不再生效,需要修改为application.yml的配置

# application.yml
spring:
  cloud:
    nacos:
      config:
        group: DEFAULT_GROUP
        server-addr: 127.0.0.1:8848
  config:
    import:
      - optional:nacos:test.yml  # 监听 DEFAULT_GROUP:test.yml
      - optional:nacos:test01.yml?group=group_01 # 覆盖默认 group,监听 group_01:test01.yml
      - optional:nacos:test02.yml?group=group_02&refreshEnabled=false # 不开启动态刷新
      - nacos:test03.yml # 在拉取nacos配置异常时会快速失败,会导致 spring 容器启动失败

需要改为

  • 如果想保留以前的使用方式(bootstrap引入配置),需要添加依赖 pring-cloud-starter-bootstrap 依赖,不需要修改一行代码。
  • 注意:

    1. refreshEnabled参数要搭配@RefreshScope使用,如果没有使用@RefreshScope注解,就算配置了refreshEnabled=true也不会自动刷新。
    2. refreshEnabled=false只是针对test02.yml这个配置文件在修改时不会自动刷新。如果test.yml中的参数和test02.yml所中的参数在同一个类中被使用且配置了@RefreshScope注解,那么在修改test02.yml后再修改test.yml会导致test02.yml被刷新。