Operators Scope

[fjammes]

In this chapter of the documentation: https://sdk.operatorframework.io/docs/building-operators/golang/operator-scope/#watching-resources-in-a-set-of-namespaces, following sentence is not clear to me:
'IMPORTANT: Note that this is not intended to be used for excluding Namespaces, this is better done via a Predicate.'

Could you please provide an example which excludes Namespaces from being managed by an operator?

[camilamacedo86]

Hi @fjammes.

It means that it should not be used to watch all ns of a cluster less one or two. For these scenarios is recommended use Predicates. For example, see the reconcile: https://github.com/operator-framework/operator-sdk/blob/master/testdata/go/v3/memcached-operator/controllers/memcached_controller.go#L61

You can use the req.NamespacedName to check if is not A or B to allow it to continue. Otherwise, does nothing.

please, let me know if it answers your question and if we can close this one.

[fjammes]

This doesn't actually show how to use predicate but suggest to just add conditional checks in the Reconcile logic itself which doesn't answer how to skip the namespaces using predicates, as stated in the official documentation.

[estroz]

An example predicate for excluding namespaces is worth documenting.

/kind documentation