https://open-cluster-management.io/developer-guides/addon/

https://github.com/open-cluster-management-io/addon-framework

https://github.com/kluster-management/addon-contrib/tree/main

> kubebuilder init --domain open-cluster-management.io --skip-go-version-check
> kubebuilder create api --group fluxcd --version v1alpha1 --kind FluxCDConfig

Enable in Hub

kubectl apply -f api/config/samples/fluxcd_v1alpha1_fluxcdconfig.yaml

Deploy to spoke clusters

clusteradm addon enable --names fluxcd-addon --namespace flux-system --clusters c1