The issue with orchestration is that you still need a way to share those small databases and config files.
Docker has ok NFS support so you'd want to move the files to NAS shares and have them mount those. Without some way to centralise or spread the files out you won't be covering your SSD failure case. Once you've got that going docker swarm will probably cover your needs just fine.
You could go with K8S but based on you setup that's a bit overkill (unless you're doing it as a learning exercise, in which case go nuts).