It’s been through quite a few iterations, but the current setup is a 35U Sysracks (not filled, I just like the space) with:
* 3x Dell R620 running K3os on clustered Proxmox
* 1x X11 Supermicro 2U with ZFS handling the disk array
* 1x X9 Supermicro 2U, also with ZFS, that is a backup target for the other one (WoL to ingest, then shutdown)
* UniFi Dream Machine Pro
* UniFi 24 port PoE 1G switch
* 2x UniFi UAP-AC-PRO APs (not in the cabinet, obvs)
* APC UPS with battery extension
The Supermicros have some cheap ADATA NVMe SSDs for boot (the X9 has a modded BIOS to make this possible).
In general I like it, but the current in-progress work is rewriting all of the Ansible playbook that generates QEMU images for Proxmox, and setting up PXE so I can grab IPs on boot for new images. The latter will enable me to shift off of K3os in favor of Talos. Technically I can do so now, but it requires manual input to set the IP addresses.
Beyond that, I want to get a 10G switch so a. RBD-backed devices are faster b. ZFS send/recv is faster c. Just because.