It's a frankenstein system of provisioning though. You have to write a config file in Ruby and embed bash scripts, which may or may not do things like invoke a

It's a frankenstein system of provisioning though. You have to write a config file in Ruby and embed bash scripts, which may or may not do things like invoke ansible scripts (written in YAML). The layers of complexity are immense, and that's before you have to start janitoring virtualbox's always half broken state. The inner loop of change vagrant config -> see result in VM is painfully slow too, waiting for the VM to tear down and setup again. Docker is much, much simpler. Write a Dockerfile that's mostly just bash or shell code. Build and run in seconds to immediately see the results. Once it's working push the container image to a public registry and you can distribute it to anything.