Simple one way password synchronization from samba 4 (>=4.7) to G Suite

I've tested this with a fresh Centos 7 Samba 4.8.2 built from sources and configured as explained described there :

1. Go to /usr/local/ and clone this repo, cd to the repo
2. Edit the config.json file with :

{
    "domain" : "yourdomain.com",
    "protected_accounts" : [ "administrator", "super.user"]
}

3. Go to your G Suite console, start or use an existing project, create credentials and get the OAuth 2.0 'client_secret_XXX.json' file and rename it to 'client_secret.json',
4. Put this file in the 'ggl' dir and chmod it to 600
5. Get Google API client and ldif3:

pip install --upgrade google-api-python-client
pip install ldif3

6. First, launch ./initialize_credentials.py
7. Add password hash userPassword schemes = CryptSHA512 to smb.conf
8. Get sure samba is up and running, and you should be able to ./start_syncing.sh and ./stop_syncing
9. You can check logs at /var/log/samba_sync/sync.log and /var/log/samba_sync/user-syncpasswords.log
10. Once everything is fine, you can copy, start and enable the startup script :
    • cp samba-gsync.service /etc/systemd/system/
    • chmod +x /etc/systemd/system/samba-gsync.service
    • systemctl start samba-gsync.service
    • systemctl enable samba-gsync.service
11. The sync.py script should not be called directly (meant to be called by samba directly)

Whenever you create a local domain user account, either from RSAT or from samba-tool, this account is also created on the G Suite domain. Synced attributes are primaryEmail, givenName and familyName and G Suite email is build with username@domain.com

If you don't provide a givenName and/or familyName, username will be used instead.

If you modify the password, it gets updated (that's the whole point...).

If you delete a local user account it is also deleted on the G Suite domain.

Accounts mentionned in the config file are protected though.