Can piranha failover all ethernet interfaces?

[Mark T. Dame]

Brian Ghidinelli wrote:
> 
> What I want is:
> 
> 10.64.2.1 (floating VIP)
> 10.64.2.2 (fw 1)
> 10.64.2.3 (fw 2)
> 
> 10.64.3.1 (floating VIP)
> 10.64.3.2 (fw 1)
> 10.64.3.3 (fw 2)
> 
> And these interfaces should failover whenever the primary nat_router is 
> failed over so that the boxes in 10.64.2 and .3, which depend on the 
> firewall/gateway for routing, will continue to have network access.
> 
> Can piranha do this?

Not directly.  You will have to write a script to bring the extra 
interfaces up or down and then use the start_cmd and stop_cmd settings 
to call the script when the service fails over.  I did something similar 
for a MySQL server.  I have two servers, each with two NICs, one 
external and one internal.  On failover, the floating IP for each 
network to switch to the appropriate server.  My service definition is:

failover mysql {
   active = 1
   address = xxx.xxx.xxx.xxx eth0:1
   port = mysql
   timeout = 3
   start_cmd = "/path/to/script/fos_failover.pl -u"
   stop_cmd = "/path/to/script/fos_failover.pl -d"
}

fos_failover.pl takes either -u (for up) or -d (for down).  On up, it 
enables the VIP on the internal NIC and sends an arp broadcast to the 
network.  On down, it disables the VIP on the internal NIC.  In both 
cases it sends an e-mail to report the failover.

The script is pretty straight forward.  It uses the perl system() 
function to call ifconfig to enable or disable the VIP and send_arp to 
send the arp notification.


-m
-- 
## Mark T. Dame <mailto:mdame at mfm.com>
## VP, Product Development
## MFM Software, Inc. (http://www.mfm.com/)
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