[Samba] Provisioning fails - Codebase question

[Rowland penny]

On 09/02/2020 02:27, Michael Hendricks via samba wrote:
> I'm trying to configure an SoC system as an AD DC on Ubuntu 18.04.  I 
> was successful on Ubuntu 16.04 a couple of years ago, and the script I 
> used to configure the system from first boot to provisioned fails on 
> 18.04 and 16.04.
>
> The failure is thus:
> Setting up self join
> set_nt_acl_no_snum: fset_nt_acl returned NT_STATUS_NOT_SUPPORTED.
> ERROR(runtime): uncaught exception - (-1073741637, 'The request is not 
> supported.')
>   File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", 
> line 176, in _run
>     return self.run(*args, **kwargs)
>   File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 
> 474, in run
>     nosync=ldap_backend_nosync, ldap_dryrun_mode=ldap_dryrun_mode)
>   File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", 
> line 2175, in provision
>     skip_sysvolacl=skip_sysvolacl)
>   File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", 
> line 1806, in provision_fill
>     names.domaindn, lp, use_ntvfs)
>   File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", 
> line 1593, in setsysvolacl
>     service=SYSVOL_SERVICE)
>   File "/usr/lib/python2.7/dist-packages/samba/ntacls.py", line 162, 
> in setntacl
>     smbd.set_nt_acl(file, security.SECINFO_OWNER | 
> security.SECINFO_GROUP | security.SECINFO_DACL | 
> security.SECINFO_SACL, sd, service=service)
>
> A couple of things stand out as possible sources, but I've been unable 
> to get these questions answered with five weeks of searching:
>
> Is Samba still using Python 2.7, or am I missing something to force it 
> to use 3.x? Python 2.7 isn't even installed on the system until after 
> Samba is installed.
>
> I have traced the code that fails, and have identified that ntacls.py, 
> the script which is failing the self join is using the function 
> samba.samba3.smbd.set_nt_acl, but "apt install samba" installs samba 
> version 4.7.6-Ubuntu. Is the use of samba3 python code related to the 
> previous question (solve the former and it'll solve the latter)?
>
>
This sounds like a problem with your SoC, what is it ? and what is the 
filesystem ?

Samba 4.7.6 uses python2.7, it is later versions that use python3 
(4.10.0 onwards) and there have been numerous reports of Samba running 
on Ubuntu 18.04 as an AD DC.

Rowland