Failed to start Execute cloud user/final scripts.

[Daniel Bidwell]

I am running maas-2.1.21 with ubuntu-16.04
installing on /dev/sde1 which is labeled for gpt

deployment fails with "Failed to start Execute cloud user/final
scripts."

The cloud-init.log contains:
Nov 29 16:36:23 acauitsr9u40 [CLOUDINIT] util.py[WARNING]: Running
module scripts-user (<module 'cloudinit.config.cc_scripts_user' from
'/usr/lib/python3/dist-packages/cloudinit/config/cc_scripts_user.py'>)
failed
Nov 29 16:36:23 acauitsr9u40 [CLOUDINIT] util.py[DEBUG]: Running module
scripts-user (<module 'cloudinit.config.cc_scripts_user' from
'/usr/lib/python3/dist-packages/cloudinit/config/cc_scripts_user.py'>)
failed#012Traceback (most recent call last):#012  File
"/usr/lib/python3/dist-packages/cloudinit/stages.py", line 792, in
_run_modules#012    freq=freq)#012  File "/usr/lib/python3/dist-
packages/cloudinit/cloud.py", line 70, in run#012    return
self._runners.run(name, functor, args, freq, clear_on_fail)#012  File
"/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 200, in
run#012    return (True, results)#012  File
"/usr/lib/python3.5/contextlib.py", line 77, in
__exit__#012    self.gen.throw(type, value, traceback)#012  File
"/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 88, in
lock#012    yield self._acquire(name, freq)#012  File
"/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 199, in
run#012    results = functor(*args)#012  File "/usr/lib/python3/dist-
packages/cloudinit/config/cc_scripts_user.py", line 57, in
handle#012    util.runparts(runparts_path)#012  File
"/usr/lib/python3/dist-packages/cloudinit/util.py", line 800, in
runparts#012    % (len(failed), len(attempted)))#012RuntimeError:
Runparts: 1 failures in 1 attempted commands

What causes this?  What other logs are useful in debugging this?  How
do I fix it?

-- 
Daniel Bidwell <drbidwell at gmail.com>