无法在InstanceProfileCredentialsProvider上加载EC2实例的凭据

Question

我已将EC2角色附加到实例，我的EC2实例，并且我正在运行AWS JAVA SDK。当我尝试以这种方式加载凭据时：

InstanceProfileCredentialsProvider instanceCred = new InstanceProfileCredentialsProvider();

我收到以下错误：

Exception in thread "main" com.amazonaws.AmazonClientException: Unable to load credentials.
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.loadCredentials(InstanceProfileCredentialsProvider.java:195)
    at com.amazonaws.auth.InstanceProfileCredentialsProvider.getCredentials(InstanceProfileCredentialsProvider.java:124)

可以建议我可能缺少什么吗？

Answer 1

我能够通过运行EC2实例中的代码并增强我的代码来解决这个问题，这里是代码：

 String arn = "arn:aws:iam::"+accountnumber+":role/My-CrossAccount-CustomRole-ReadOnly";

InstanceProfileCredentialsProvider instanceCred = new InstanceProfileCredentialsProvider();

stscred = new STSAssumeRoleSessionCredentialsProvider(instanceCred.getCredentials(),arn,"123",clientConfiguration);

确保您的角色操作中有"sts:AssumeRole"。