[Samba] samba-tool domain backup offline stalls

[James B. Byrne]

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?

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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited          http://www.harte-lyne.ca
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