Are there any major alternatives for automatic failover on Linux besides the typical Heartbeat/Pacemaker/CoroSync combinations? In particular, I'm setting up failover on EC2 instances, which only supports unicast - no multicast or broadcast. I'm specifically trying to handle the few pieces of software we have which don't already have automatic failover and don't support multi-master environments. This includes tools like HAProxy and Solr.
I have Heartbeat+Pacemaker working, but I'm not thrilled with it. Here are some of my issues:
- Heartbeat - By itself, limited to two nodes. I'd like to have 3+.
- Pacemaker - Impossible to configure automatically. Cluster has to be running with a quorum and then it still requires manual configuration.
- CoroSync - Does not support unicast.
Pacemaker works very well, although it's power makes it difficult to setup. The real problem with Pacemaker is that there is no easy way to automate the configuration. I really want to launch an EC2 instance, install Chef/Puppet and have the entire cluster launch without my intervention.