Recent versions of Docker (>= 1.3.0) no longer expose a HTTP endpoint, opting instead the more secure HTTPS protocol. Unfortunately it may not be possible in some environments or with some tools to use HTTPS. The following is a quick workaround to use the socat utility to proxy access to the Docker socket.
Like a lot of other Mac users, I run boot2docker to run Docker on my laptop. Boot2docker is a tiny Linux VM that is usually run headless under Oracle’s VirtualBox. Boot2docker runs a relatively unknown Linux distribution called Tiny Core Linux. Tiny Core is pretty neat, but it’s not obvious how to install extra packages like you might easily do on other Linux distributions. Here’s how to install extra packages on your boot2docker instances.
Following on from a previous post about Using Ccache with Docker, here’s how to build a Debian packaging using Ccache.