How do I create a cluster of bitcoind nodes for p2pool

[Morblias]

I am running a bitcoind node with p2pool on one server. I would like to have a backup bitcoind on another server in case the first one freezes or crashes. How would I go about setting up p2pool to have a failover bitcoind?

I see in the readme there is this:

Code:

bitcoind interface:
  --bitcoind-address BITCOIND_ADDRESS
                        connect to this address (default: 127.0.0.1)

But does that allow for multiple IP addresses for bitcoind or just one? Also, would both bitcoind's have to have the same RPCUSER/PASSWORD in the bitcoin.conf?