本文介紹了Spring Cloud AWS SQS無法在本地連接到服務端點的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
我正在嘗試在我正在進行的一個項目中使用Spring Cloud的AWS SQS。目前，我只在我的開發機器上本地運行該應用程序。因此，我想要的是連接到AWS上的SQS，而不必將我的應用程序部署到EC2實例。
然而，似乎Spring Cloud的AWS包中使用的AWS SDK將嘗試通過元數據進行身份驗證，并希望解析169.254.169.254/latest/meta-data/instance-id。由于我仍在本地運行應用程序，因此無法解析終結點并引發錯誤：
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]
...
我已嘗試在我的Bean中顯式提供一個SQS終結點，但它仍試圖連接到169.254.169.254，導致上面的錯誤：
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();
}
雖然我不確定這一點，但我懷疑錯誤的發生是因為我在開發機器上本地運行應用程序，所以它無法解析到終結點。但我也不能完全確定這一點，因為我正在使用AWS SDK在同一個應用程序中運行其他AWS服務，并且我沒有出現此錯誤。
我的pom.xml中有以下依賴項，似乎其中任何一個都會導致錯誤發生。也就是說，我甚至不需要創建出現該錯誤的Bean。由于某些原因，添加這些依賴項將立即導致SDK嘗試解析該終結點并失敗，并出現該錯誤。
<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>
我還應該做些什么來修復它無法連接到服務終結點的錯誤？
推薦答案
我在運行AWS SNS的Spring Boot項目時收到以下錯誤
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
應用的解決方案：
將以下代碼片段添加到SpringBootApplication&；在IDE中單擊運行按鈕
@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
}
)
這篇關于Spring Cloud AWS SQS無法在本地連接到服務端點的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，
