Comment 7 for bug 1459865

[ 0.000000] Command line: nomodeset netcfg/choose_interface=auto text priority=critical auto url=http://10.245.0.10/MAAS/metadata/latest/enlist-preseed/?op=get_enlist_preseed locale=en_US hostname=maas-enlist domain=oil log_host=10.245.0.10 log_port=514 -- console=ttyS1,115200 initrd=ubuntu/amd64/generic/trusty/release/boot-initrd BOOT_IMAGE=ubuntu/amd64/generic/trusty/release/boot-kernel BOOTIF=01-d4-ae-52-cb-c3-b8

In the provided console log in comment 2, you booted with the above kernel command line.
that would seem to imply that you were booting d-i.
normal ephemeral or enlistment parameters would have iscsi params like:

  iscsi_target_name=${target_name} iscsi_target_ip=$ipaddr
  iscsi_initiator=maas-enlist
  ip=::::maas-enlist:BOOTIF ro
  root=/dev/disk/by-path/ip-$ipaddr:$iport-iscsi-${target_name}-lun-1