[fosk]

I'm new to these tools. Given your explanation, how does Docker replace a packaged Vagrant machine[0] with all the software already pre-installed (without using Chef)?

[0] http://docs.vagrantup.com/v2/cli/package.html

[tbrock]

Much lighter weight. Instead of hosting an entire operating system you just host the application.

Imagine spinning up your db instance vm, your web tier vm, your load balancer vm... etc.

Unless you have a ton of ram it isn't going to happen. With docker you can run containers that mimick a very very large infrastructure on your laptop.

[vivab0rg]

What about using Vagrant with the [vagrant-lxc plugin](http://fabiorehm.com/blog/2013/04/28/lxc-provider-for-vagran...)?