AWS: instance metadata for iam is not found

Question

I'm trying to set up elasticsearch s3 snapshots on my ec2 instances. And it fails with following error:

nested: NotSerializableExceptionWrapper[sdk_client_exception: The requested metadata is not found at http://169.254.169.254/latest/meta-data/iam/security-credentials/

If I query the metadata server from that ec2 instance, it responses the following:

$ curl http://169.254.169.254/latest/meta-data/
ami-id
ami-launch-index
ami-manifest-path
block-device-mapping/
events/
hostname
identity-credentials/
instance-action
instance-id
instance-type
local-hostname
local-ipv4
mac
metrics/
network/
placement/
profile
public-keys/
reservation-id
security-groups
services/

So there is no iam section.

How to make iam section available for querying from ec2 instance ?

Answer 1

Following meta-data URI will return something if you have the role attached to the given ec2 instance:

http://169.254.169.254/latest/meta-data/iam/security-credentials/

so it looks like you don't have an IAM role attached. Please verify.