Multi-master (HA)

[Baird, Josh]

Hi,

For those of you who operate at multiple sites or datacenters, are you doing any HA for your BIND masters?  Ideally, we would have a master in each datacenter; maybe not an active one, but one that is standing by in case your primary master becomes unavailable.  

Do you have multiple "active" masters and list them as master in each of your slave's zone definitions?  This seems like it could get rather messy.  One thought is to use a technology like VMWare SRM which will spin up a master/virtual machine automatically in a second datacenter if your primary master goes down.  This coupled with Layer2 connectivity between your sites could make things fairly simple.  The standby/secondary master would retain the same IP address as your primary, so everything should just *work*.  

What are others doing?  Any thoughts, ideas or advice is much appreciated.

Thanks,

Josh