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I find that nomad is actually a very good alternative.

Sure, https://github.com/Azure/draft doesn't require any YAML and deploys onto Kubernetes.

I remember someone also doing a demo of configuring your kubernetes deployment on your Java objects directly.

OpenShift of course. And no, there are no alternatives AFAIK for the setups.

I believe there are a few viable k8s alternatives depending on your requirements. We use Jsonnet currently, but CUElang looks neat as well.