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Re: [Samba] Van Belle Repo - 4.10 for Bionic




On Sun, 31 Mar 2019 at 14:22, Rowland Penny via samba
<samba@xxxxxxxxxxxxxxx> wrote:
>
> On Sun, 31 Mar 2019 13:55:18 +0200
> Viktor Trojanovic via samba <samba@xxxxxxxxxxxxxxx> wrote:
>
> > On Sat, 30 Mar 2019 at 17:45, L.P.H. van Belle <belle@xxxxxxxxx>
> > wrote:
> > >
> > > you can upgrade from 4.7 to 4.9.
> > > but you must run samba-tool dbcheck
> > > that should work also. after the check run samba-tool dbcheck
> > > --reindex
> >
> > I thought that maybe indeed I did something wrong the last time so I
> > followed your advice. Unfortunately, it broke my DC again. (Luckily, I
> > made a snapshot before doing this so I should be able to easily
> > revert).
> >
> > So I went through with the update from 4.7.4 to 4.9.4, and after the
> > update I ran:
> >
> > # samba-tool dbcheck
> > Checking 322 objects
> > Checked 322 objects (0 errors)
> >
> > # samba-tool dbcheck --reindex
> > Re-indexing
> > completed re-index OK
> >
> > # ldbedit -H /var/lib/samba/private/sam.ldb
> > (shows contents of sam.ldb, closing the file)
> >    # 0 adds  0 modifies  0 deletes
> >
> > # reboot
> >
> > # journalctl -xe
> >
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > /usr/sbin/samba_dnsupdate: ERROR(runtime):
> > uncaught exception - (9711, 'WERR_DNS_ERROR_RECORD_ALREADY_EXISTS')
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]: [2019/03/31
> > 11:43:52.021002,  0] ../lib/util/
> > util_runcmd.c:327(samba_runcmd_io_handler)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > /usr/sbin/samba_dnsupdate:   File "/usr/lib
> > /python2.7/dist-packages/samba/netcmd/__init__.py", line 177, in _run
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]: [2019/03/31
> > 11:43:52.021202,  0] ../lib/util/
> > util_runcmd.c:327(samba_runcmd_io_handler)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > /usr/sbin/samba_dnsupdate:     return self.
> > run(*args, **kwargs)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]: [2019/03/31
> > 11:43:52.021375,  0] ../lib/util/
> > util_runcmd.c:327(samba_runcmd_io_handler)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > /usr/sbin/samba_dnsupdate:   File "/usr/lib
> > /python2.7/dist-packages/samba/netcmd/dns.py", line 945, in run
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]: [2019/03/31
> > 11:43:52.021539,  0] ../lib/util/
> > util_runcmd.c:327(samba_runcmd_io_handler)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > /usr/sbin/samba_dnsupdate:     raise e
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]: [2019/03/31
> > 11:43:52.047043,  0] ../source4/d
> > sdb/dns/dns_update.c:330(dnsupdate_nameupdate_done)
> > Mar 31 11:43:52 dc1 samba[224]: task[dnsupdate][224]:
> > ../source4/dsdb/dns/dns_update.c:330: Faile
> > d DNS update - with error code 26
> >
> > Does anyone have an idea what causes these errors?
> >
> > - Viktor
> >
>
> Yes, it appears that the change to the GUID index mode that first
> appeared in 4.8.0 is the culprit. I don't think anybody really knows why
> it fails, but it is believed to be that 4.9.x thinks the GUID index
> mode is being used, but the database is still the 4.7.x type.
>
> There have been a few workarounds suggested, but, to my knowledge, the
> only real upgrade path is to 'walk' up the versions. From 4.7.x upgrade
> to 4.8.x, run this so the database is changed to the GUID index mode
> and then upgrade to 4.9.x or higher.
>

That was the last information I had. I thought something changed after
seeing Andrew comment in the bug report
(https://bugzilla.samba.org/show_bug.cgi?id=13760) and Louis
confirming that this should actually work.

Do you happen to know how to do the walk on Ubuntu? If I understand
this correctly, unless I want to compile myself (and I don't), I need
packages, and neither Ubuntu nor Louis provide packages for 4.8. Which
is why I'm thinking to upgrade by just joining a new DC based on Samba
4.9.4. Or wait for Louis to publish 4.10 as this should, in my
understanding, make it possible again to upgrade properly.

- Viktor

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