[Samba] samba-tool domain backup offline stalls

[Rowland penny]

On 22/07/2020 19:40, James B. Byrne via samba wrote:
>
> On Wed, July 22, 2020 12:35, James B. Byrne wrote:
>> FreeBSD-12.1p7 jail running Samba-4.10.15 on ZFS.
>>
>> When I run 'samba-tool domain backup offline targetdir=/tmp' I see this:
>>
>> running backup on dirs: /var/db/samba4/private /var/db/samba4 /usr/local/etc
>> Starting transaction on /var/db/samba4/private/secrets
>>
> I tried the backup online option instead and received a timeout error:
>
> ERROR(runtime): uncaught exception - (3221225653, '{Device Timeout} The
> specified I/O operation on %hs was not completed before the time-out period
> expired.')
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/__init__.py", line
> 185, in _run
>      return self.run(*args, **kwargs)
>    File "/usr/local/lib/python3.7/site-packages/samba/netcmd/domain_backup.py",
> line 249, in run
>      backend_store=backend_store)
>    File "/usr/local/lib/python3.7/site-packages/samba/join.py", line 1555, in
> join_clone
>      backend_store=backend_store)
>    File "/usr/local/lib/python3.7/site-packages/samba/join.py", line 1632, in
> __init__
>      backend_store=backend_store)
>    File "/usr/local/lib/python3.7/site-packages/samba/join.py", line 100, in
> __init__
>      ctx.site = ctx.find_dc_site(ctx.server)
>    File "/usr/local/lib/python3.7/site-packages/samba/join.py", line 361, in
> find_dc_site
>      flags=nbt.NBT_SERVER_LDAP | nbt.NBT_SERVER_DS)
>
> I infer that this is related to the ntpd service which listens at TCP137.  This
> service is not running on this host because it is disabled in smb.conf.  The
> reason that it is disabled is that samba_server does not start:
>
> [2020/07/22 12:48:49.786881,  0] ../../source4/smbd/server.c:587(binary_smbd_main)
>    samba version 4.10.15 started.
>    Copyright Andrew Tridgell and the Samba Team 1992-2019
> [2020/07/22 12:48:50.079799,  0] ../../source4/smbd/server.c:773(binary_smbd_main)
>    binary_smbd_main: samba: using 'standard' process model
> [2020/07/22 12:48:50.103387,  0]
> ../../source4/nbt_server/interfaces.c:228(nbtd_add_socket)
>    Failed to bind to 127.0.162.1:137 - NT_STATUS_ADDRESS_ALREADY_ASSOCIATED
> [2020/07/22 12:48:50.150866,  0] ../../lib/util/become_daemon.c:136(daemon_ready)
>    daemon_ready: daemon 'samba' finished starting up and ready to serve connections
> [2020/07/22 12:48:50.184811,  0]
> ../../source4/smbd/service_task.c:36(task_server_terminate)
>    task_server_terminate: task_server_terminate: [nbtd failed to setup interfaces]
> [2020/07/22 12:48:50.300712,  0] ../../source4/smbd/server.c:371(samba_terminate)
>    samba_terminate: samba_terminate of samba 86503: nbtd failed to setup interface
>
>
> Anyone know how to deal with this?
>
If you have lines in your smb.conf similar to these:

     bind interfaces only = yes
     interfaces = lo eth0

Remove them, there was a bug, now fixed, that caused this.

Rowland