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Even Google's Go client for the GCE metadata uses an IP address: > Using a fixed IP makes it very difficult to spoof the metadata https://github.com/googleapi

• skj 5y ago
  Hmm cloud build spoofs it :) if the customer build accessed the underlying VM's metadata it would be very confusing (though not a security issue). It was not straightforward. I learned a lot about iptables and docker networking.