[Linux-cluster] Samba Statefull Failover

[jayfitzpatrick at gmail.com]

Hi Abhijith,

The planned setup for us is to host Citrix / Windows users home directories  
on the shared storage, contained within these directories is some Lotus  
Notes config files (address book etc) and notes throws a canary whenever  
there is a break in connection to these files and does not attempt a  
re-connect, and as a result I was hoping to be able to fail over the file  
locks. The directory as presented to the Citrix clients fails over  
flawlessly, the OS reconnects to the new server and you would never have  
known that the backend has moved, but Notes, errors all over the place,  
clicking out of error messages (x12) very visible, very irritating, and  
horrible in a demo of your new file server with your manager!

I also seem to be getting clients disconnecting from the node that I am not  
stopping the service on, but this may just be me, I will re-test tomorrow.

thanks for the feedback

Jay



On Jun 22, 2010 3:33pm, Abhijith Das <adas at redhat.com> wrote:


> ----- "Jason Fitzpatrick" jayfitzpatrick at gmail.com> wrote:



> > From: "Jason Fitzpatrick" jayfitzpatrick at gmail.com>

> > To: linux-cluster at redhat.com

> > Sent: Tuesday, June 22, 2010 6:43:36 AM GMT -06:00 US/Canada Central

> > Subject: [Linux-cluster] Samba Statefull Failover

> >

> > Hi all

> >

> > Just wondering if it is possible to statefully migrate smb

> > connections

> > between cluster nodes, I am running ctdb (Samba's Cluster software)

> > but all connections are dropped when the service is failed between

> > nodes

> >

> > Setup is as follows

> >

> > 2 node cluster

> > DRBD backend shared storage in Master Master configuration

> > cman presenting GFS2 /Storage folder

> > Samba + Winbind + CTDB used to present /Storage/Test_Share via

> > \\clustername\test_share (both nodes are AD integrated)

> >

> > Connections to replicated storage are working fine, AD accounts are

> > authenticated correcly and smbstatus shows that CTDB is load

> > ballancing the cluster address between nodes correctly,

> >

> > When I run ctdb shutdown I expect existing connections to be migrated



> Also, I think "ctdb shutdown" is not the right command (Use "ctdb  
> disable", it

> should all be in the man pages). Only one node should fail so that the

> other node can take over the IP address. If the IP address is not taken

> over, the clients will probably not be able to reconnect.



> Cheers!

> --Abhi



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