[Samba] samba-tool domain join: Unable to open tdb '/var/lib/samba/private/secrets.ldb': No such file or directory

Michael Tokarev mjt at tls.msk.ru
Mon Oct 31 14:25:18 UTC 2022

31.10.2022 17:14, Rowland Penny via samba wrote:
>>> The join doesn't add a Unix ID to a computers object:
>>> 1) it is only used by the 'ad' idmap backend
>>> 2) there is nowhere to find the next ID to use.
>> Yeah it doesn't, and I remember coming across that already in the past debugging
>> this issue, - I had to manually add uidNumber & gidNumber to the computer object.
>> But I didn't add these attributes to all of them, - eg, another (non-test) server
>> here (which also logs this very error message *alot*, btw) does not have it too,
>> while some windows machines have it.
>> If it can not be added automatically but is required, maybe it is a good idea
>> to add a warning somewhere at the end of `samba-tool domain join' output about
>> that?
> Sorry, but I am not going to try and fight that battle again.

Which battle?  Are you saying it is absolutely wrong to print a warning if
samba-tool domain join were unable to assign uidNumber to the new object
it created? Hmm okay, I'll shut up now, because it looks like I don't
understand something fundamental...

>>> You are going to need more than '99' for the default domain.
>> This is interesting. So far I don't see any uids used in there. At least
>> getent passwd 5000..50099 return nothing (while getent passwd 1006 does
>> return mjt-adm info).  What these user IDS are used for, and when?
> Microsoft has the concept of Well Known SIDs and there are nearly 200 of these, they are mapped on a first come basis in the default '*' domain .tdb 
> file, there also need to to be space for anything outside your main domain e.g. another domain.

Are these 200 actually being used in a domain member? I especially
assigned a relatively low range to see what goes in there, in a
first come basis, and there's nothing in there still (after almost
a year of this AD domain operations).  Maybe my setup is somehow
wrong and these required entries aren't being written?  How to
debug with lack of entries in this "other" range?



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