A low power 1U Raspberry Pi cluster server for inexpensive colocation

Summary

There are server colocation providers that allow hosting a 1U server for as low as $30/month, but there's a catch: There are restrictions on power usage (1A @ 120v max, for example) because they're expecting small and power-efficient network equipment like firewalls. This repo is about designing a server that fits within the 1U space and 1A @ 120v power constraint while maximizing computing power, storage, and value. Total cost: ~$800 You will need to do this for each of the Raspberry Pi's: Remove the hard drive bay dividers and front panel extension cable from the inside of the chassis. Install the Raspberry Pi's into their cases. Install the M.2 drives into their enclosures. Insert a SD card into each of the Pi's. Follow the Software Setup guide if you haven't already. Add mounting tape to the bottom of each of the SSD enclosures and attach them to the top of the Raspberry Pi's. Add mounting tape to the bottom of the raspberry pi cases. Don't remove the bottom cover of the mounting tape adhesive yet. Remove the rubber feet from the bottom of the networking switch and replace with 4x small squares of mounting tape. Don't remove the bottom cover of the mounting tape adhesive yet. Add labels with numbers to the tops of the cases. These numbers will correspond to the hostnames of the Pi's in the software setup. Use wire cutters to remove the metal adjacent to the ethernet port and mount the port side of the ethernet extension to the back of the chassis with washers and the included bolts. Cut a section of the plastic sheet that came with the chassis (for under the motherboard) to fit under the power supply breakout board. Drill holes in the chassis, insert nylon standoffs, and add the plastic sheet. Cut 5x 6" lengths of red standed wire, strip the both ends, and install one end of each wire into the "+" slots of the USB terminal blocks and the other side of each wire into the 5V terminals of the ATX power supply breakout board. Make sure the 20 pin power supply has a ...