RBAC

Create Service Account, Role & Assign that role, And create a secret for Service Account and geenrate a Token

Creating Service Account –

Create name space

kubectl create ns webapps

vi ServiceAccount.yml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: jenkins
  namespace: webapps

kubectl apply -f ServiceAccount.yml

Create Role

vi role.yml

apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: app-role
  namespace: webapps
rules:
  - apiGroups:
        - ""
        - apps
        - autoscaling
        - batch
        - extensions
        - policy
        - rbac.authorization.k8s.io
    resources:
      - pods
      - componentstatuses
      - configmaps
      - daemonsets
      - deployments
      - events
      - endpoints
      - horizontalpodautoscalers
      - ingress
      - jobs
      - limitranges
      - namespaces
      - nodes
      - secrets
      - pods
      - persistentvolumes
      - persistentvolumeclaims
      - resourcequotas
      - replicasets
      - replicationcontrollers
      - serviceaccounts
      - services
    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]

kubectl apply -f role.yml

Bind the role to service account

vi rolebinding.yml

apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: app-rolebinding
  namespace: webapps 
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: app-role 
subjects:
- namespace: webapps 
  kind: ServiceAccount
  name: jenkins 

kubectl apply -f rolebinding.yml

Generate token using service account in the namespace

vi service-account-token.yml

apiVersion: v1
kind: Secret
type: kubernetes.io/service-account-token
metadata:
  name: mysecretname
  annotations:
    kubernetes.io/service-account.name: jenkins

kubectl apply -f service-account-token.yml -n webapps

kubectl describe secret mysecretname -n webapps

copy the token