Spring Cloud AWS SQS无法在本地连接到服务端点 [英] Spring Cloud AWS SQS fails to connect to service endpoint locally

问题描述

我正在尝试在我正在进行的一个项目中使用Spring Cloud的AWS SQS。目前，我只在我的开发机器上本地运行该应用程序。因此，我想要的是连接到AWS上的SQS，而不必将我的应用程序部署到EC2实例。

然而，似乎Spring Cloud的AWS包中使用的AWS SDK将尝试通过元数据进行身份验证，并希望解析169.254.169.254/latest/meta-data/instance-id。由于我仍在本地运行应用程序，因此无法解析终结点并引发错误：

2019-12-29 16:38:27.420  WARN 22462 --- [  restartedMain] com.amazonaws.util.EC2MetadataUtils      : Unable to retrieve the requested metadata (/latest/meta-data/instance-id). Failed to connect to service endpoint: 

com.amazonaws.SdkClientException: Failed to connect to service endpoint: 
    at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:100) ~[aws-java-sdk-core-1.11.699.jar:na]
    at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:70) ~[aws-java-sdk-core-1.11.699.jar:na]
    at com.amazonaws.internal.InstanceMetadataServiceResourceFetcher.readResource(InstanceMetadataServiceResourceFetcher.java:75) ~[aws-java-sdk-core-1.11.699.jar:na]
    at com.amazonaws.internal.EC2ResourceFetcher.readResource(EC2ResourceFetcher.java:62) ~[aws-java-sdk-core-1.11.699.jar:na]
    at com.amazonaws.util.EC2MetadataUtils.getItems(EC2MetadataUtils.java:400) ~[aws-java-sdk-core-1.11.699.jar:na]
    at com.amazonaws.util.EC2MetadataUtils.getData(EC2MetadataUtils.java:369) ~[aws-java-sdk-core-1.11.699.jar:na]
    at org.springframework.cloud.aws.context.support.env.AwsCloudEnvironmentCheckUtils.isRunningOnCloudEnvironment(AwsCloudEnvironmentCheckUtils.java:38) ~[spring-cloud-aws-context-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.cloud.aws.context.annotation.OnAwsCloudEnvironmentCondition.matches(OnAwsCloudEnvironmentCondition.java:37) ~[spring-cloud-aws-context-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:221) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassParser.processImports(ConfigurationClassParser.java:587) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE]
...

我已尝试在我的Bean中显式提供一个SQS终结点，但它仍试图连接到169.254.169.254，导致上面的错误：

public AmazonSQSAsync sqsClient() {
   EndpointConfiguration endpointConfig = new AwsClientBuilder.EndpointConfiguration(
        "sqs.us-east-1.amazonaws.com",
        "us-east-1"
   );

   return AmazonSQSAsyncClientBuilder
                .standard()
                .withEndpointConfiguration(endpointConfig)
                .withCredentials(new AWSStaticCredentialsProvider(new DefaultAWSCredentialsProviderChain().getCredentials()))
                .build();
}

虽然我不确定这一点，但我怀疑错误的发生是因为我在开发机器上本地运行应用程序，所以它无法解析到终结点。但我也不能完全确定这一点，因为我正在使用AWS SDK在同一个应用程序中运行其他AWS服务，并且我没有出现此错误。

我的pom.xml中有以下依赖项，似乎其中任何一个都会导致错误发生。也就是说，我甚至不需要创建出现该错误的Bean。由于某些原因，添加这些依赖项将立即导致SDK尝试解析该终结点并失败，并出现该错误。

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-aws</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-aws-messaging</artifactId>
            <version>2.2.1.RELEASE</version>
        </dependency>

我还应该做些什么来修复它无法连接到服务终结点的错误？

推荐答案

我在运行AWS SNS的Spring Boot项目时收到以下错误

i.InstanceMetadataServiceResourceFetcher : Fail to retrieve token
com.amazonaws.util.EC2MetadataUtils      : Unable to retrieve the requested metadata (/latest/dynamic/instance-identity/document). Failed to connect to service endpoint:


Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'stackResourceRegistryFactoryBean' defined in class path resource [org/springframework/cloud/aws/autoconfigure/context/ContextStackAutoConfiguration.class]: Unsatisfied dependency expressed through method 'stackResourceRegistryFactoryBean' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'amazonCloudFormation' defined in class path resource [org/springframework/cloud/aws/autoconfigure/context/ContextStackAutoConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: There is no EC2 meta data available, because the application is not running in the EC2 environment. Region detection is only possible if the application is running on a EC2 instance

Error creating bean with name 'org.springframework.cloud.aws.core.env.ResourceIdResolver.BEAN_NAME': Invocation of init method failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'stackResourceRegistryFactoryBean' defined in class path resource [org/springframework/cloud/aws/autoconfigure/context/ContextStackAutoConfiguration.class]: Unsatisfied dependency expressed through method 'stackResourceRegistryFactoryBean' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'amazonCloudFormation' defined in class path resource [org/springframework/cloud/aws/autoconfigure/context/ContextStackAutoConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: There is no EC2 meta data available, because the application is not running in the EC2 environment. Region detection is only possible if the application is running on a EC2 instance

应用的解决方案： 将以下代码片段添加到SpringBootApplication&；在IDE中单击运行按钮

@SpringBootApplication(
        exclude = {
                org.springframework.cloud.aws.autoconfigure.context.ContextInstanceDataAutoConfiguration.class,
                org.springframework.cloud.aws.autoconfigure.context.ContextStackAutoConfiguration.class,
                org.springframework.cloud.aws.autoconfigure.context.ContextRegionProviderAutoConfiguration.class
        }
)

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