AWS EC2 metadata. Check attached IAM role from EC2 instance. Get temporary credentials.

gistfile1.txt

# Get IAM Role name from Instance Profile Id
curl http://169.254.169.254/latest/meta-data/iam/info

# Get credentials
curl http://169.254.169.254/latest/meta-data/iam/security-credentials/<role-name>

# More info
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html

I found a simpler way (no need to process InstanceProfileArn to get the role name):

role_name=$( curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/ )
curl -s http://169.254.169.254/latest/meta-data/iam/security-credentials/${role_name}

very useful, thanks a lot guys

Can we get the role ARN in the meta data?