[PATCH] Use samba-tool to add DNS entries with samba_dnsupdate

[Andrew Bartlett]

On Fri, 2015-08-28 at 16:50 +1200, Andrew Bartlett wrote:
> On Fri, 2015-08-28 at 15:52 +1200, Andrew Bartlett wrote:
> > On Tue, 2015-08-25 at 18:16 +0200, Andreas Schneider wrote:
> > > On Tuesday 11 August 2015 16:40:58 Andrew Bartlett wrote:
> > > > Can you look at my current samba_dnsupdate branch?  I would 
> > > > like 
> > > > to 
> > > > see
> > > > this merged into master as soon as I have tests for it.  It may 
> > > > 
> > > > not 
> > > > be
> > > > perfect, but it is a massive improvement on the current state, 
> > > > and
> > > > combined with your dns_update_cache work allows the name and IP 
> > > > 
> > > > of 
> > > > a
> > > > Samba AD DC to be changed and for us to still recover into a 
> > > > working
> > > > state.
> > > > 
> > > > This will in turn help a lot of our administrators who 
> > > > currently 
> > > > have a
> > > > lot of trouble in this situation.
> > > > 
> > > > (The tests are pending the resolv_wrapper and socket_wrapper 
> > > > work 
> > > > 
> > > > I'm
> > > > sorting out with Andreas).
> > > 
> > > Hi Andrew,
> > > 
> > > I've released resolv_wrapper 1.1.3 and socket_wrapper 1.1.4 to 
> > > use 
> > > our 
> > > internal DNS server for testing. It works fine for the standard 
> > > AD_DC 
> > > but it 
> > > fails setting up the fl2003dc:local environment. I don't know why 
> > > 
> > > it 
> > > doesn't 
> > > work there yet. I will look into this next week, if you want to 
> > > investigate 
> > > earlier, you need the changes from here:
> > > 
> > > https://git.samba.org/?p=asn/samba.git;a=shortlog;h=refs/heads/ma
> > > st
> > > er
> > > -selftest
> > > 
> > > 
> > > Then run:
> > > 
> > > make -j testenv SELFTEST_TESTENV="fl2003dc:local"
> > > 
> > > 
> > > It might be another bug in our DNS server ...
> > 
> > It is, but not in the way you think.  The issue is that we need it 
> > to
> > forward DNS queries between the two forests, for the trust to be 
> > set 
> > up
> > correctly.  While I've currently set up a hack (attached) to make 
> > it
> > forward between the two servers, this may break other things.  
> > 
> > The autobuild got as far as a smb2.notify test failing, that may or 
> > 
> > may
> > not be related:
> >  
> > [432(1779)/1870 at 50m34s] samba3.smb2.notify(nt4_dc)
> > TESTING CHANGE NOTIFY BASEDIR EVENTS
> > maximum runtime exceeded for smbtorture - terminating
> > UNEXPECTED(error): samba3.smb2.notify.basedir
> > (samba.subunit.RemotedTestCase)(nt4_dc)
> > REASON: Exception: Exception: was started but never finished!
> > UNEXPECTED(error): samba3.smb2.notify.basedir(nt4_dc)
> > (samba.subunit.RemotedTestCase)
> > REASON: was started but never finished!
> 
> The attached patches help ensure we really use resolv_wrapper, and 
> not
> nss_wrapper, and that the 127. addresses used actually get written 
> into
> DNS.

This exposes an interesting thing that we need.  Adding this exposes a
missing feature in resolv_wrapper, because it now can no longer find
short names, as it needs to implement the 'search' keyword.

https://bugzilla.samba.org/show_bug.cgi?id=11478

I looked into why another improbable case worked (looking for a
workaround), and noticed this bug:

https://bugzilla.samba.org/show_bug.cgi?id=11477

Once we fix that, we will need to fix
torture/rpc/lsa.c:check_pw_with_krb5(), as it relies on this bug (or
run that test against $SERVER_IP).

In the meantime, I'm running another autobuild to see how far we get
when using nss_wrapper and resolv_wrapper.

Thanks,

Andrew Bartlett

-- 
Andrew Bartlett
https://samba.org/~abartlet/
Authentication Developer, Samba Team         https://samba.org
Samba Development and Support, Catalyst IT   
https://catalyst.net.nz/services/samba




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