This article teaches you the basics of RBAC (i.e. Role, ClusterRole, RoleBinding, and ClusterRoleBinding) and the advantages:
1. Granular control.
2. Centralized management.
3. Separation of responsibilities.
4. Least privilege principle.
More: https://medium.com/@ahmetmesutal/kubernetes-rbac-role-based-access-control-creating-serviceaccounts-useraccounts-116e4ecd0150
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