[Pacemaker] Building an active/passive dhcp server

[Emmanuel Lesouef]

Hello,

I'm trying to make a active/passive dhcp server.

Currently, it works with the following setup :

* 2 debian servers with pacemaker :
node1 with physical ip1 and virtual ip vip1 (managed with pacemaker)
node2 with physical ip2.

* 1 lsb dhcp3-server resource that is on node1 and migrates ok on node2,

* a rsync cron gets the dhcp lease file from node1 to node2 in order
  not to start an empty dhcp lease file,

* the server should be delivering dhcp lease with vip1 because it
  is on a vlan and core router use cisco ip helper to send dhcp
  requests.

The problem is that when node1 come online again, there's a difference
in the dhcp lease file.

I think that using rsync to synchronize the lease file is not the best
solution and that a clustered file system is the best solution.

What are your opinions about such a setup ? Are there some "best
practices" ?

Thanks for your help and informations about this.

-- 
Emmanuel Lesouef