What is Kubernetes RBAC and how does it work?

What is Kubernetes RBAC and how does it work?

Kubernetes RBAC (Role-Based Access Control) is a method for regulating access to resources in a Kubernetes cluster. It allows you to define roles and assign them to users or groups, controlling what actions they can perform.

Can you explain the components of RBAC?

Sure! The main components of RBAC in Kubernetes are Roles, RoleBindings, ClusterRoles, and ClusterRoleBindings. Roles define permissions within a namespace, while ClusterRoles apply to the entire cluster. RoleBindings and ClusterRoleBindings associate these roles with users or groups.

How do I create a Role in Kubernetes?

To create a Role, you can use a YAML file to define the role and its permissions, then apply it using kubectl apply -f <filename>.yaml. Here's a simple example:

apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  namespace: your-namespace
  name: your-role
rules:
- apiGroups: [""]  # empty string indicates the core API group
  resources: ["pods"]
  verbs: ["get", "list", "watch"]