So you would like to play around with your very own data center? The Circumference Raspberry Pi Data Center has you covered. It comes with command line tools, Python API, and everything you need to test new ideas, learn things, or get serious about cloud and HPC software development.
The Circumference is based around the Raspberry Pi and UDOO x86 platforms and available in 8+1 and 32+1 node configurations. It has plenty of Ethernet ports, fans, power supplies, and auxiliary power ports for you to take advantage of.