I am thinking about using cluster vs namespaced scope k8s operators.
In theory i have a lot of namespaces and i can deploy some kubernetes operator KO for each namespace. I suppose that in this case in each namespace KO subscribed for events in kubernets cluster for each namespace. Сould this be a performance problem for the cluster? Maybe for big number of namespaces is better idea to use cluster scope operator ? (It manage many instances for many namespaces but have only one subscription)
"Namespace-scoped" points to the custom resource handled by the operator, rather than the operator itself. One operator in the cluster can handle both namespace-scoped resources and cluster-scoped resources, so there is no need to distribute an operator deployment to many namespaces.
Here you can find more information about operator scopes.