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http://169.254.169.254/ url returns ec2 instance metadata. Where is this url hosted and how is it able to get meta-data of an instance? Is it private ip address which can be accessed only when logged into an ec2 instance?
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Calls to
http://169.254.169.254are intercepted by the Amazon EC2 hypervisor and are returned to the instance. Such requests do not flow over the network.Common uses are:
http://169.254.169.254/latest/meta-data/http://169.254.169.254/latest/user-data/There is also the lesser-known:
http://169.254.169.254/latest/dynamic/For more details, see: Instance Metadata and User Data - Amazon Elastic Compute Cloud