At some point, as your Kubernetes cluster grows in complexity, the question of role-based security will become important. Typically, this means breaking the cluster up into namespaces and limiting access to namespaced resources to specific accounts.

To support this, Kubernetes includes a number of resources, including roles, cluster roles, role bindings, and cluster role bindings. At a high level, roles, and role bindings are placed inside of and grant access to a specific namespace, while cluster roles and cluster role bindings do not belong to a namespace and grant access across the entire cluster.

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