There’s a Singularity driver for Nomad
https://www.nomadproject.io/docs/drivers/external/singularit...
Nomad is pretty darn easy to run and scales far. I help run about 20 clusters in day job from 100 to 1800 nodes, we’re going to push one of them to over 8500 nodes here soon too.
We don’t use the Singularity driver but we wrote two of our own and they work well and are easy to maintain.