Disclaimer: I work for the company which wrote the blog post.
We basically do this at ReleaseHub, however there is a level of indirection we introduced. We basically have our own version of Kompose which generates our own YAML file, which we call an Application Template[1]. The Application Template then gets parsed into Kubernetes YAML and deployed, however as an end user, you never have you deal with the Kubernetes YAML.
The main piece missing is that we set everything up to parse the docker-compose file once and then expect people to interact with our YAML. However, having seen the level of interest about compose in this thread I'm wondering if maybe there is a feature to be built where we remove the need for interacting with our YAML, an end user can push changes to their compose and through GitOps we update everything and deploy new changes to Kubernetes.
The compose spec has come a long way since we started (we were attending the spec meetings back in 2020 to see how the project was going to kick off) and is in an even better place to support this direct Compose -> Kubernetes idea.
If you're curious, feel free to reach out jeremy@releasehub.com.
here's the thing - people have a degree of discomfort with "your own YAML". I'm not trying to flame, but genuinely tell you what the evolution of FUD has been.
At this point, you are sitting in a landscape which has already argued around Borg vs Kubernetes and consequently YAML vs Jsonnet vs Cue (e.g. https://github.com/cue-lang/cue/discussions/669). We have original Borg and k8s architects who have spilled lot of ink on this.
It is going to be super hard to digest another custom markup. This is really your battleground. People will ask - why not the standrdised Compose specification or standardised jsonnet/cue. In this context, Compose is kind of loved by all (though not the technically superior choice here)
the good news is - ur asking the same question probably and thats a good direction. You also have the steps to build up on (k3s, k11s, k9s - yes they are all different things and very cool). Best wishes if you go down this path.
Compose would be awesome.