We just released an operator with similar goals, but it works across clouds. More details here: https://www.pulumi.com/blog/pulumi-kubernetes-operator/

Azure has an incubation project which is building a Golang CRD generator and a generic Azure resource controller [k8s-infra]. It will likely end up being used in Azure Service Operator [ASO].

[k8s-infra]: https://github.com/Azure/k8s-infra

[ASO]: https://github.com/Azure/azure-service-operator

GCP (Config Connector) and Azure (Service something) both have similar things. I've not heard of it happening outside a managed k8s env.

https://crossplane.io is doing a multi-cloud one

I like their work, but their OAM centricity is too heavy an opiniation.

disclaimer: I'm a maintainer on Crossplane.

OAM is an optional feature of crossplane - you don't have to use it if you don't want to

Good to know, at least that warm me up to crossplane further. The messaging might need update, including within the docs. I mean - crossplane is the OAM implement - coupled with OAM sprinkled all over docs, gave me very different impression.

This aside, I think crossplane work is interesting.