Create a network_interface
>> g = AWS.network_interfaces.new(:subnet_id => "subnet-someId", options) >> g.save
options is an optional hash which may contain 'PrivateIpAddress', 'Description', 'groupSet'
requestId and a networkInterface object
# File lib/fog/aws/models/compute/network_interface.rb, line 59 def save requires :subnet_id data = service.create_network_interface(subnet_id).body['networkInterface'] new_attributes = data.reject {|key,value| key == 'requestId'} merge_attributes(new_attributes) true end