Spring Boot 从 AWS 参数存储读取参数

Inv*_*ble 6 java spring amazon-web-services spring-boot aws-parameter-store

我创建了 spring boot(gradle) 应用程序,并包含了依赖项: org.springframework.cloud:spring-cloud-starter-aws-parameter-store-config.

我想用来AWSSimpleSystemsManagement从 AWS 参数存储中读取配置,但我被迫这样写(在 aws 中):

 config/application_dev/server.port: 8080
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有什么办法可以从spring boot中读取这样的内容: dev.application.server.port:8080

目前我认为所有这些都是通过自动配置管理的,有没有办法覆盖它

Evg*_*yst 7

application.properties 中,您可以定义 property server.port=8081

spring-cloud-starter-aws-parameter-store-config支持的参数格式有:

  • /config/application/server.port
  • /config/application_dev/server.port
  • /config/my-service/server.port
  • /config/my-service_dev/server.port

通过在bootstrap.properties 中定义以下属性,您可以以某种方式更改格式:

spring.application.name=my-service
aws.paramstore.prefix=/config
aws.paramstore.defaultContext=application
aws.paramstore.profileSeparator=_
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但仅支持简单的自定义,因为主要参数命名逻辑是AwsParamStorePropertySourceLocator.

要显着更改参数格式,您必须定义自定义PropertySourceLocator并将其注册为引导程序配置。

问题是dev.application.server.port参数名无效。

AWS Systems Manager Parameter Store/用作路径分隔符,Spring 使用操作get-parameters-by-path。一种解决方法是使用 name dev.application/server.port

但是这个名字也是无效的。参数名称必须是完全限定名称,因此有效名称为/dev.application/server.port.

为了支持这样的参数格式定义一个自定义 PropertySourceLocator

@Configuration
public class CustomAwsParamStorePropertySourceLocator implements PropertySourceLocator {

  private static final Logger LOGGER =
      LoggerFactory.getLogger(CustomAwsParamStorePropertySourceLocator.class);

  private AWSSimpleSystemsManagement ssmClient;

  private List<String> contexts = new ArrayList<>();

  public CustomAwsParamStorePropertySourceLocator(AWSSimpleSystemsManagement ssmClient) {
    this.ssmClient = ssmClient;
  }

  public List<String> getContexts() {
    return contexts;
  }

  @Override
  public PropertySource<?> locate(Environment environment) {
    if (!(environment instanceof ConfigurableEnvironment)) {
      return null;
    }

    ConfigurableEnvironment env = (ConfigurableEnvironment) environment;

    List<String> profiles = Arrays.asList(env.getActiveProfiles());

    String defaultAppName = "application";
    this.contexts.add("/" + defaultAppName + "/");
    addProfiles(this.contexts, defaultAppName, profiles);

    String appName = env.getProperty("spring.application.name");
    this.contexts.add("/" + appName + "/");
    addProfiles(this.contexts, appName, profiles);

    Collections.reverse(this.contexts);

    CompositePropertySource composite = new CompositePropertySource("custom-aws-param-store");

    for (String propertySourceContext : this.contexts) {
      try {
        composite.addPropertySource(create(propertySourceContext));
      } catch (Exception e) {
        LOGGER.warn("Unable to load AWS config from " + propertySourceContext, e);
      }
    }

    return composite;
  }

  private void addProfiles(List<String> contexts, String appName, List<String> profiles) {
    for (String profile : profiles) {
      contexts.add("/" + profile + "." + appName + "/");
    }
  }

  private AwsParamStorePropertySource create(String context) {
    AwsParamStorePropertySource propertySource =
        new AwsParamStorePropertySource(context, this.ssmClient);
    propertySource.init();
    return propertySource;
  }
}
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并通过添加文件在引导程序上下文中注册它 META-INF/spring.factories

org.springframework.cloud.bootstrap.BootstrapConfiguration=\
com.example.CustomAwsParamStorePropertySourceLocator
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  • `spring.factories` 是 Spring Cloud 提供的注册新 `PropertySouceLocator` 的唯一方法 - https://cloud.spring.io/spring-cloud-commons/multi/multi__spring_cloud_context_application_context_services.html#customizing-bootstrap-property-sources (2认同)