[Pacemaker] create 2-node Active/Passive firewall cluster

[Michael Schwartzkopff]

Am Mittwoch, 18. September 2013, 14:55:21 schrieb Jeff Weber:
> Michael:
> 
> Thanks. That helps me move forward.
(...)
> I'm still a bit unclear on how the cluster monitors the VIP resources.
> Do I have exactly one stanza of totem interface, and set the bindnetaddr to
> the heartbeat net?
> How does the cluster monitor for a VIP on a dead interface?

The monitoring operation of a IP address resource issues a "ip a l dev (...)" 
command and looks if the IP address is still bound to the interface. Any 
failure (i.e. interface down, IP address vanished) results in an error of the 
monitoring operation and a reaction of the cluster.

Additionally use a ping resource. That resoruce sends a ping to an IP address 
outside of the cluster. If the node receives the answer it can be pretty sure 
that the attached network works.

Greetings,

-- 
Dr. Michael Schwartzkopff
Guardinistr. 63
81375 München

Tel: (0163) 172 50 98
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