Ask HN: If not Kubernetes, what do you use to run your apps?

Kubernetes is everywhere these days, and it might feel like there are very few alternatives to it when you need a simpler sort of self-hosted platform to run your apps/workloads (not talking right now about PaaS options like Heroku, Render, etc.)

- What do people use for single-server app management?

- For multi-node setups, is anyone using Docker Swarm, Nomad, or any other tool that is outside the Kubernetes ecosystem?