[Linux-HA] Very simple HA webserver setup

[Brian Kirkbride]

Hello all,

I've been researching Linux-HA for a bit now and have been thoroughly 
impressed with the project.  Thanks so much for contributing all of 
this effort.

I have a few questions about a simple setup:

* Node 1 is an active webserver with static content
* Node 2 is a passive failover (synchronized through rsync)
* Machines have 2 NICs (public and private), heartbeat uses both
* No serial connection is possible in this datacenter
* Resources will be 1 virtual IP (using IPaddr2) and httpd
* There is *no* shared storage of any kind.
* Preference is for failback to Node 1 on recovery

Is STONITH of any importance in this setup?  I think not, but wondered 
what may happen if Node 1 goes AWOL and Node 2 takes over while Node 1 
still has the virtual IP in use.  Will the arping from Node2 preclude 
anyone from talking to Node 1 anymore.  Or will there be some 
contention for the IP?

STONITH is desirable in that it might bring Node1 back.  My worry is 
that with a 2-node cluster like this, STONITH leads to both nodes 
shooting each other.

Reading the docs and list archives has helped, but this is such a 
simple case it doesn't show up in FAQs or on the list.

Best,
Brian Kirkbride