Installed cron `keymaker-group-sync` fails on adding user to group

The automatically installed cron /etc/cron.d/keymaker-group-sync fails when it needs to add a user to a group:

INFO:keymaker:Syncing IAM group keymaker_mynewgroup
WARNING:keymaker:User myuser1 is not provisioned or not managed by keymaker, skipping
INFO:keymaker:Adding user myuser2 to group sudo
Traceback (most recent call last):
  File "/usr/local/bin/keymaker", line 89, in <module>
    locals()[args.command](args)
  File "/usr/local/lib/python2.7/dist-packages/keymaker/__init__.py", line 240, in sync_groups
    subprocess.check_call(["usermod", "--append", "--groups", unix_group_name, user])
  File "/usr/lib/python2.7/subprocess.py", line 535, in check_call
    retcode = call(*popenargs, **kwargs)
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Problem is that the $PATH variable is not set. Current solution is to set the variable manually (used /etc/environment):

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
*/5 * * * * root /usr/local/bin/keymaker sync_groups

The cron would have probably also failed on the other commands used by sync_groups: groupadd and gpasswd. By setting the PATH these commands should work as well.

My environment details: Keymaker: 0.4.3 Distribution: Ubuntu 14.04.5 LTS Kernel: Linux 3.13.0-112-generic #159-Ubuntu

[jbergknoff-rival]

Same situation on Ubuntu 18.04

[jbergknoff-rival]

Sorry I didn’t respond earlier. This problem can be reproduced using a stock Ubuntu 18.04 AMI in EC2, i.e. those provided by Canonical here: https://cloud-images.ubuntu.com/locator/ec2/.