[Samba] Users loose supplementary groups after a time
orion at nwra.com
Thu May 14 20:59:34 UTC 2020
Sorry, I thought I had re-enabled delivery, but I had not. So trying to reply
to Rowland Penny here:
> On 14/05/2020 18:46, Orion Poplawski via samba wrote:
>> All -
>> I seem to be suffering from the common complaint that users loose
>> supplementary group access after a while - in our case it seems to be
>> connections left overnight. Restarting smb fixes it. I haven't been able to
>> determine the cause.
>> though I think that is to be expected at this point as we are not using
>> winbind idmapping to map AD users, but rather we have an IPA - AD trust and so
>> have local unix users already.
> Yes, but is winbind running ?>> Server is Scientific Linux release 7.8
>> workgroup = DOMAIN
>> security = ads
>> realm = AD.DOMAIN
>> # Workaround unix group issue (https://bugzilla.samba.org/show_bug.cgi?id=10618)
>> username map script = /bin/echo
>> Is the above now causing more issues?
> I think it is what isn't there that is the problem
>> Recent changes that I can think of are then 7.8 update and configuring AD
>> sites. Though I think this problem has likely been occurring for a long time
>> - but for some reason we are seeing more connections left overnight.
> You do not say what you upgraded from, but 7.8 will now mean you have a
> Samba version >= 4.8.0 and from Samba 4.8.0 you need to run winbind if
> you have 'security = ADS' in smb.conf. This also means you need the
> 'idmap config' lines as well, which means you cannot have the same users
> in /etc/passwd.
I upgraded from 7.7. And yes since we've had samba >= 4.8.0 for a while now
we've been running winbind.
This configuration (dropping the username map script hack) seems to be working
for us, does this seem correct?
idmap config * : backend = tdb
idmap config * : range = 1000000-1999999
idmap config DOMAIN : backend = nss
idmap config DOMAIN : range = 1000-999999
winbind scan trusted domains = no
Manager of NWRA Technical Systems 720-772-5637
NWRA, Boulder/CoRA Office FAX: 303-415-9702
3380 Mitchell Lane orion at nwra.com
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