[lvs-users] Sync issue after master reboot

To: "lvs-users@xxxxxxxxxxxxxxxxxxxxxx" <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: [lvs-users] Sync issue after master reboot
From: "Markhasin, Dan" <dan.markhasin@xxxxxxxxx>
Date: Wed, 12 Feb 2014 16:59:09 +0000

We are currently building an LVS cluster with two ldirector servers to ensure 
HA. Each of these servers has two ipvsadm 1.26 sync daemons running, which we 
start by:

On master:

--start-daemon master --syncid 50

--start-daemon backup --syncid 51

On backup:

--start-daemon master --syncid 51

--start-daemon backup --syncid 50

During normal operation there are no issues, connections are made to the master 
and are synced to the backup. In case the master goes down, the connections 
seamlessly transfer over to the backup.
However, in the case of a reboot of the master, after the master is brought 
back online and the ipvsadm daemons are started, the existing connections from 
the backup server are not synced to the master - causing them all to disconnect 
whenever a failback is performed. New connections made to the slave are synced, 
but the old ones are not.

I have seen references from the past decade to this problem, but have found no 
solution for syncing the master and the backup server after the master's 
reboot. Any help would be greatly appreciated!

Intel Israel (74) Limited

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.
Please read the documentation before posting - it's available at: mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to

<Prev in Thread] Current Thread [Next in Thread>