~smoser/cloud-init/lp-1077700

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import cloudinit
import UserDataHandler as ud

class DataSource:
    userdata = None
    metadata = None
    userdata_raw = None

    def __init__(self):
       pass

    def get_userdata(self):
        if self.userdata == None:
            self.userdata = ud.preprocess_userdata(self.userdata_raw)
        return self.userdata

    def get_userdata_raw(self):
        return(self.userdata_raw)

    def get_public_ssh_keys(self):
        return([])

    def device_name_to_device(self, name):
        # translate a 'name' to a device
        # the primary function at this point is on ec2
        # to consult metadata service, that has
        #  ephemeral0: sdb
        # and return 'sdb' for input 'ephemeral0'
        return(None)