Chef and Puppet can deploy just fine into a development machine - either a VM (i'd recommend this) or even on your host machine. I can't imagine any workload that's simple enough to be handled by a vanilla, untuned mysql instance and at the same time not simple enough to be handled by a scripted postgres installation. Things get different once you're getting to more complex workloads, but the effort of tuning a mysql instance to handle those is in the same ballpark as the effort of tuning a postgres instance.