<p>Kubernetes <a href="https://kubernetes.io/docs/reference/access-authn-authz/rbac/" rel="nofollow noreferrer">RBAC</a> can be used to give permissions to a subject in a particular Namespace. Can the same be accomplished with Cloud IAM?</p>

dippynark
<p>Not at the moment, no. IAM is used to assign and verify permissions when interacting with GCP APIs. IAM can only provide access to the GKE API, which does not take into account namespaces.</p>

<p>As you mentioned, RBAC is your option for more granular permissions within the cluster</p>
