[Samba] 4.5.1 Upgrade Breaks Samba [Was: Schema Change Breaks Replication]

[Andrew Bartlett]

On Sun, 2016-11-20 at 16:50 -0500, Adam Tauno Williams via samba wrote:
> On Sun, 2016-11-20 at 21:11 +0000, Rowland Penny via samba wrote:
> > On Sun, 20 Nov 2016 15:55:08 -0500
> > Adam Tauno Williams via samba <samba at lists.samba.org> wrote:
> > > And it looks like nobody is listening on port 135 -
> > > [root at larkin26 ~]# netstat --listen --inet --program --numeric
> > > Active Internet connections (only servers)
> > > Proto Recv-Q Send-Q Local Address               Foreign
> > > Address State       PID/Program name   
> > 
> > If that is the entire output, not only is nothing listening on port
> > 135, Samba doesn't seem to be listening at all, is it running ?
> 
> That is the entire output;  samba is not listening.
> 
> It is started.
> 
> ....
>  2049 ?        Ss     0:00 sshd: root at pts/0 
>  2051 pts/0    Ss     0:00 -bash
>  2486 ?        S      0:00 /usr/sbin/samba -D
>  2487 ?        Ss     0:00 /usr/sbin/winbindd -D --option=server role
> check:inhibit=yes --foreground
>  2493 ?        S      0:00 /usr/sbin/winbindd -D --option=server role
> check:inhibit=yes --foreground
>  2502 pts/0    R+     0:00 ps ax
> [root at larkin26 sernet]# 
> 
> [2016/11/20 16:50:40.326604,  0]
> ../source4/smbd/server.c:372(binary_smbd_main)
>   samba version 4.5.1-SerNet-RedHat-6.el6 started.
>   Copyright Andrew Tridgell and the Samba Team 1992-2016
> [2016/11/20 16:50:40.970014,  0]
> ../source4/smbd/server.c:479(binary_smbd_main)
>   samba: using 'standard' process model
> [2016/11/20 16:50:40.983383,  0]
> ../source4/rpc_server/dcerpc_server.c:1668(dcesrv_init_context)
>   dcesrv_init_context: failed to find endpoint server = 'winreg'
> [2016/11/20 16:50:40.983724,  0]
> ../source4/smbd/service_task.c:35(task_server_terminate)
>   task_server_terminate: [Failed to startup dcerpc server task]
> [2016/11/20 16:50:40.994293,  0]
> ../source4/smbd/server.c:211(samba_terminate)
>   samba_terminate of 2479: Failed to startup dcerpc server task
> [2016/11/20 16:50:41.033979,  0]
> ../source4/smbd/service.c:98(server_service_startup)
>   Failed to start service 'smb' - NT_STATUS_INVALID_SYSTEM_SERVICE
> [2016/11/20 16:50:41.038319,  0]
> ../lib/util/become_daemon.c:111(exit_daemon)
>   STATUS=daemon failed to start: Samba failed to start services,
> error
> code -1073741796
> 
> Any idea why "smb" is not an invalid service?

We no longer include the ntvfs file server (that is what 'smb' referred
to, it is a historical oddity from before the 4.0 merge) in the default
build.  If you are using bind9, set:
 server services = -dns
if you are not usind bind9 for DNS, remove 'server services'.

Likewise remove any dcerpc endpoint services line. 

Samba will refuse to start up if the smb.conf referred to invalid or
not-built components. 

Finally, in case this is how it happened, never use the output of
testparm -v as an smb.conf file, please only specify options you need
to change, so when we change the defaults you don't need to know about
it.

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