creds

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Creds

Creds is a library that simplifies the management of user accounts and their credentials on Linux, FreeBSD and OpenBSD.

Instead of issuing commands to create, update and delete users and their ssh keys, supply Creds with details of the users you want and it will take care of the implementation.

The supported inputs are currently YAML, JSON or python dictionaries.

User vs System accounts

| Linux has a default range of user ids to provide to system and user accounts, found in /etc/login.defs. | Creds will attempt to read this file to determine which accounts are in scope for management and, if unavailable, will default to:

| UID\_MIN = 1000 # User accounts will have an id of 1000 or more
| UID\_MAX = 60000 # User accounts will not have an id higher than
  60000

Example Usage

Read a list of users from users.yml and create them (if missing) or update (if existing):

::

from creds.users import Users
from creds.plan import (create_plan, execute_plan)

existing_users = Users.from_passwd()  # Get a list of existing users and their keys
proposed_users = Users.from_yaml('users.yml')  # Read the proposed list of users and their keys

# Generate a list of operations to transition from current to existing
plan = create_plan(existing_users=existing_users, proposed_users=proposed_users)
execute_plan(plan=plan)  # Execute the plan

Deleting users

If your input defines all of the user accounts you want to exist, you can choose to purge any that are undefined by adding a parameter to create_plan:

::

plan = create_plan(existing_users=existing_users, proposed_users=proposed_users,
                   purge_undefined=True)

Protecting users

If there are users you want to protect from change, e.g. you want to make sure that certain users are not deleted or updated under any circumstances, then you can supply a list of usernames for Creds to ignore:

::

plan = create_plan(existing_users=existing_users, proposed_users=proposed_users,
                   purge_undefined=True, protected_users=['rod', 'jane', 'freddy'])