Good Q. Not explicitly, AFAIK. We do have a integral chaos monkey in Slider (incubating), which you just turn on, give a sleep time and then schedule multiple actions (worker death, AM death).
If you are working with an EC2 cluster, you can just use Netflix's Chaos Monkey lib and have it do the killing.
Otherwise, the general best practise is to have something automated to SSH in and find/kill processes. I don't have any up to date code for this; I used to somewhere but it relates to older linux versions, and has probably aged now. I'm afraid you'll have to look around online for that.
What is really, really slick for testing HA failover is code to turn real/virtual network switches off. This is good as it lets you rigorously test what happens if there's a network partition and everything stays running, just unreachable.
Pro tip: issuing a kill -SIGSTOP is a great way to simulate a hung (as opposed to a failed) process.
