cloud-init

Adding and reporting ssh keys fails for user in extrausers

Bug #1679777 reported by Scott Moser on 2017-04-04

This bug affects 3 people

Affects		Status	Importance	Assigned to	Milestone
	cloud-init	Expired	Medium	Unassigned

Bug Description

If a user is added with '--extrausers' (which happens on ubuntu core)
then adding ssh keys or reporting which keys are added will fail as the users cannot be found.
This seems a general issue as extrausers, see bug 1679765.

The stack trace looks like:

2017-04-04 16:57:00,117 - util.py[WARNING]: Applying ssh credentials failed!
2017-04-04 16:57:00,117 - util.py[DEBUG]: Applying ssh credentials failed!
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/config/cc_ssh.py", line 195, in handle
    apply_credentials(keys, user, disable_root, disable_root_opts)
  File "/usr/lib/python3/dist-packages/cloudinit/config/cc_ssh.py", line 204, in apply_credentials
    ssh_util.setup_user_keys(keys, user)
  File "/usr/lib/python3/dist-packages/cloudinit/ssh_util.py", line 241, in setup_user_keys
    (ssh_dir, pwent) = users_ssh_info(username)
  File "/usr/lib/python3/dist-packages/cloudinit/ssh_util.py", line 205, in users_ssh_info
    pw_ent = pwd.getpwnam(username)
KeyError: 'getpwnam(): name not found: ubuntu'

and then

2017-04-04 16:57:04,559 - util.py[WARNING]: Running module ssh-authkey-fingerprints (<module 'cloudinit.config.cc_ssh_authkey_fingerprints' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ssh_authkey_fingerprints.py'>) failed
2017-04-04 16:57:04,560 - util.py[DEBUG]: Running module ssh-authkey-fingerprints (<module 'cloudinit.config.cc_ssh_authkey_fingerprints' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ssh_authkey_fingerprints.py'>) failed
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 787, in _run_modules
    freq=freq)
  File "/usr/lib/python3/dist-packages/cloudinit/cloud.py", line 54, in run
    return self._runners.run(name, functor, args, freq, clear_on_fail)
  File "/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 187, in run
    results = functor(*args)
  File "/usr/lib/python3/dist-packages/cloudinit/config/cc_ssh_authkey_fingerprints.py", line 108, in handle
    (key_fn, key_entries) = ssh_util.extract_authorized_keys(user_name)
  File "/usr/lib/python3/dist-packages/cloudinit/ssh_util.py", line 212, in extract_authorized_keys
    (ssh_dir, pw_ent) = users_ssh_info(username)
  File "/usr/lib/python3/dist-packages/cloudinit/ssh_util.py", line 205, in users_ssh_info
    pw_ent = pwd.getpwnam(username)
KeyError: 'getpwnam(): name not found: ubuntu'