It's been a while since I posted anything about my little cluster. Things have changed with it a great deal, so it's a good time to update you all!

Hardware-wise the last few weeks has seen some changes: The RBG Fan has gone, replaced by a USB powered fan, without RGB. I needed to be able to cool the cluster without the ominous glow.

A Node has been removed to allow for a small network switch to be mounted in the case itself, complete with some new short patch cables for between the nodes and the switch. It's much tidier now, and only requires a power cable and a single ethernet cable connecting to have it in action. 

All Nodes are now running official Pi PoE hats; the USB fan is powered by the top node.

Software-wise the node has temporarily been reduced to a Master and Single node maintaining my database instances; the third node is now a more general testing environment for running homeassistant, and the removed node is currently running an openmediavault test environment, complete with a Plex Server. It is possible to deploy containers on OMV, so I may look to perhaps expand on that and see what OMV can do.

The OMV test project is working towards me receiving an Argon Pi NAS enclosure in a few months, which will give me a four bay Pi NAS to handle all my storage (and will be done so with a RAID array for redundancy), so some of my databases may be migrated over to that and leave the cluster for webserving.

I love having this cluster, it's incredibly versatile. The ability to switch the OS by simply switching the USB drive is fantastic.