[Bug 1864329] Re: too long netbios name shouldn't be a fatal error

[Andreas Hasenack]

** Description changed:

  The container I'm using to test the fix for
  https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1864324 has a
  somewhat long hostname:
  
  $ hostname -f
  focal-bind9-upgrade-test.lxd
  
  Samba by default will try to use the host part as its netbios name. Such
  names have a length limit, which is a bit short.
  
  When using testparm, this is flagged:
- $ testparm 
+ $ testparm
  Load smb config files from /etc/samba/smb.conf
  Loaded services file OK.
  WARNING: The 'netbios name' is too long (max. 15 chars).
  ...
  
  But is not a fatal error.
  
- The samba postinst, however, uses (for reasons unknown to me) "samba-
- tool testparm", and that has a different behavior:
+ The samba-common-bin postinst, however, uses "samba-tool testparm" when
+ the "server role" is "active directory domain controller", and that has
+ a different behavior:
  
  $ samba-tool testparm
  INFO 2020-02-22 21:16:42,905 pid:37370 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #96: Loaded smb config files from /etc/samba/smb.conf
  INFO 2020-02-22 21:16:42,905 pid:37370 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #97: Loaded services file OK.
  ERROR 2020-02-22 21:16:42,905 pid:37370 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #124: netbios name FOCAL-BIND9-UPGRADE-TEST is not a valid netbios name
  Press enter to see a dump of your service definitions
  (...)
  ERROR: Invalid smb.conf
  $ echo $?
  255
  
  This fails the package installation.
  Setting up samba-common-bin (2:4.11.5+dfsg-1ubuntu2~ppa1) ...
  Checking smb.conf with samba-tool
  INFO 2020-02-22 21:11:22,932 pid:36820 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #96: Loaded smb config files from /etc/samba/smb.conf
  INFO 2020-02-22 21:11:22,933 pid:36820 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #97: Loaded services file OK.
  ERROR 2020-02-22 21:11:22,933 pid:36820 /usr/lib/python3/dist-packages/samba/netcmd/testparm.py #124: netbios name FOCAL-BIND9-UPGRADE-TEST is not a valid netbios name
  ERROR: Invalid smb.conf
  dpkg: error processing package samba-common-bin (--configure):
-  installed samba-common-bin package post-installation script subprocess returned error exit status 255
+  installed samba-common-bin package post-installation script subprocess returned error exit status 255
+ 
+ Unless it's absolutely critical that in an AD role the netbios name be
+ 15 characters long max, this should just be a warning instead of a fatal
+ error.

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https://bugs.launchpad.net/bugs/1864329

Title:
  too long netbios name shouldn't be a fatal error

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