samba - Nov 2005 - Samba HA on two nodes

Hi All,

Is anybody succeed to run a configuration on a two node clusters with Samba
installed on each machine?

I compiled two versions on different directories (/usr/local/samba1 and samba2).
At this point, I can run 2 samba's on one node in case of failure but
problems are on Active Directory
authentication for the Fallback node.

Any suggestion!

I'm running AIX 5.2 with HACMP and samba 3.0.20b and AD servers located on
another subnet.


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On Nov 21, 2005, at 5:42 AM, HENRY Vincent wrote:
> Is anybody succeed to run a configuration on a two node clusters  
> with Samba installed on each machine?
>
> I compiled two versions on different directories (/usr/local/samba1  
> and samba2).
> At this point, I can run 2 samba's on one node in case of failure  
> but problems are on Active Directory
> authentication for the Fallback node.
Yes, I am, but it does not do file sharing, just printing.

What I did was set up a logical IP on both machines and if the  
fallback node detected that the other node's primary IP went down, it  
would turn on that interface and start samba. Not exactly the most  
perfect setup but it seems to work pretty well. I use regularly  
scheduled rsyncs to keep the various tdbs and printer drivers in sync.

For file serving you'd probably want to add a stonith device and then  
have both machines attached to a scsi array.  There's still that  
array being the single point of failure, but it's better than nothing.

David Schlenk
Operating Systems Analyst
Bethel University
david-schlenk@bethel.edu

I have been using a samba 2 node cluster for over a year now; it has been 
very successful.

I have a PDC/LDAP Master BDC/LDAP Slave configuration.
I have heartbeat configured, and DRBD Raid1 over LAN for the home 
directories/profiles.

In the smbldap.conf I have the profiles & home pointing to the clusters 
virtual IP as DRBD can only have one partition mount on the cluster at any 
one time. This means if the BDC handles a logon without the share mounted; 
it will use the share mounted on the PDC. :S

To me it has proven itself to be a very successful overall configuration.

Regards,

Adrian Sender.



-------------------------------------------------------------------------------------
From: David Schlenk <david-schlenk@bethel.edu>
To: HENRY Vincent <Vincent.HENRY@sonaca.com>
Cc: samba@lists.samba.org
Subject: Re: [Samba] Samba HA on two nodes
Sent: Thursday, 24 November 2005 1:58:07 AM

On Nov 21, 2005, at 5:42 AM, HENRY Vincent wrote:

    Is anybody succeed to run a configuration on a two node clusters  with 
Samba installed on each machine?

I compiled two versions on different directories (/usr/local/samba1  and 
samba2).
At this point, I can run 2 samba's on one node in case of failure  but 
problems are on Active Directory
authentication for the Fallback node.


Yes, I am, but it does not do file sharing, just printing.

What I did was set up a logical IP on both machines and if the  fallback 
node detected that the other node's primary IP went down, it  would turn on 
that interface and start samba. Not exactly the most  perfect setup but it 
seems to work pretty well. I use regularly  scheduled rsyncs to keep the 
various tdbs and printer drivers in sync.

For file serving you'd probably want to add a stonith device and then  have 
both machines attached to a scsi array.  There's still that  array being the
single point of failure, but it's better than nothing.

David Schlenk
Operating Systems Analyst
Bethel University
david-schlenk@bethel.edu

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