samba4 failed to install - ProvisioningError: guess_names: 'server role=standalone' in domain controller must match chosen server role '/etc/samba/smb.conf'! Please remove the smb.conf file and let provision generate it

Status changed to 'Confirmed' because the bug affects multiple users.

In the meantime until this is fixed, you can just mv /etc/samba/smb.conf /etc/samba/smb.conf.backup and finish the install and it should succeed.

Source:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659775#24

This bug was fixed in the package samba4 - 4.0.0~alpha18.dfsg1-4

---------------
samba4 (4.0.0~alpha18.dfsg1-4) unstable; urgency=low

  * Add patch 08_smb2_deps: Remove (unnecessary) dependencies on various
    private Samba 3 libraries, for which proper package Depends: lines were
    missing. Closes: #665295
  * Add dependency on tdb-tools. This will be removed once upstream
    removes the use of tdbbackup in provision. Closes: #664658

 -- Jelmer Vernooij <email address hidden> Wed, 28 Mar 2012 16:20:21 +0200

Ran aptitude install samba4 and got the same error messages on a clean install of ubuntu 12.04. This was for samba4-alpha 18 I believe. No debs were installed/added to apt-get prior to running install.

Adding output of apt-get install samba4 samba4-clients

Reading package lists...
Building dependency tree...
Reading state information...
Suggested packages:
  phpldapadmin samba-gtk swat2
The following NEW packages will be installed:
  samba4 samba4-clients
Preconfiguring packages ...
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/1,710 kB of archives.
After this operation, 11.4 MB of additional disk space will be used.
Selecting previously unselected package samba4.
(Reading database ... 32430 files and directories currently installed.)
Unpacking samba4 (from .../samba4_4.0.0~alpha18.dfsg1-4ubuntu2_i386.deb) ...
Selecting previously unselected package samba4-clients.
Unpacking samba4-clients (from .../samba4-clients_4.0.0~alpha18.dfsg1-4ubuntu2_i386.deb) ...
Processing triggers for man-db ...
Processing triggers for ureadahead ...
Setting up samba4 (4.0.0~alpha18.dfsg1-4ubuntu2) ...
ERROR: Invalid smb.conf
ERROR: Invalid smb.conf
/var/lib/dpkg/info/samba4.postinst: 14: /var/lib/dpkg/info/samba4.postinst: /usr/share/samba/setoption.pl: Permission denied
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 126

have the same trouble, samba4 is still broken on 12.04!

root@gw:~# apt-get install samba4
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut
Statusinformationen werden eingelesen... Fertig
Das folgende Paket wurde automatisch installiert und wird nicht mehr benötigt:
  keyutils
Verwenden Sie »apt-get autoremove«, um sie zu entfernen.
Vorgeschlagene Pakete:
  phpldapadmin samba-gtk swat2
Die folgenden NEUEN Pakete werden installiert:
  samba4
0 aktualisiert, 1 neu installiert, 0 zu entfernen und 1 nicht aktualisiert.
Es müssen noch 0 B von 1.662 kB an Archiven heruntergeladen werden.
Nach dieser Operation werden 11,4 MB Plattenplatz zusätzlich benutzt.
Vorkonfiguration der Pakete ...
Traceback (most recent call last):
  File "/usr/bin/samba-tool", line 26, in <module>
    from samba.netcmd.main import cmd_sambatool
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/main.py", line 24, in <module>
    from samba.netcmd.delegation import cmd_delegation
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/delegation.py", line 29, in <module>
    from samba.netcmd.common import _get_user_realm_domain
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/common.py", line 24, in <module>
    from samba.net import Net
ImportError: libkdc-policy.so: cannot open shared object file: No such file or directory
Traceback (most recent call last):
  File "/usr/bin/samba-tool", line 26, in <module>
    from samba.netcmd.main import cmd_sambatool
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/main.py", line 24, in <module>
    from samba.netcmd.delegation import cmd_delegation
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/delegation.py", line 29, in <module>
    from samba.netcmd.common import _get_user_realm_domain
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/common.py", line 24, in <module>
    from samba.net import Net
ImportError: libkdc-policy.so: cannot open shared object file: No such file or directory
Vormals nicht ausgewähltes Paket samba4 wird gewählt.
(Lese Datenbank ... 57254 Dateien und Verzeichnisse sind derzeit installiert.)
Entpacken von samba4 (aus .../samba4_4.0.0~alpha18.dfsg1-4ubuntu2_amd64.deb) ...
Trigger für man-db werden verarbeitet ...
Trigger für ureadahead werden verarbeitet ...
samba4 (4.0.0~alpha18.dfsg1-4ubuntu2) wird eingerichtet ...
/var/lib/dpkg/info/samba4.postinst: 14: /var/lib/dpkg/info/samba4.postinst: /usr/share/samba/setoption.pl: Permission denied
dpkg: Fehler beim Bearbeiten von samba4 (--configure):
 Unterprozess installiertes post-installation-Skript gab den Fehlerwert 126 zurück
E: Sub-process /usr/bin/dpkg returned an error code (1)

where I deletet the old smb.conf. before with smb.conf from samba 3 it failed too.

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