manager.yaml

apiVersion: v1
kind: Namespace
metadata:
  labels:
    control-plane: controller-manager
  name: system
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: controller-manager
  namespace: system
  labels:
    control-plane: controller-manager
spec:
  selector:
    matchLabels:
      control-plane: controller-manager
  replicas: 2
  template:
    metadata:
      annotations:
        kubectl.kubernetes.io/default-container: manager
      labels:
        control-plane: controller-manager
    spec:
      securityContext:
        runAsNonRoot: true
      containers:      
      - command:
        - /manager
        args:
        - --leader-elect
        image: controller:latest
        name: manager
        securityContext:
          allowPrivilegeEscalation: false
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8081
          initialDelaySeconds: 15
          periodSeconds: 20
        readinessProbe:
          httpGet:
            path: /readyz
            port: 8081
          initialDelaySeconds: 5
          periodSeconds: 10
        # TODO(user): Configure the resources accordingly based on the project requirements.
        # More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
        resources:
          limits:
            cpu: 500m
            memory: 128Mi
          requests:
            cpu: 10m
            memory: 64Mi
        env:
        - name: SPECIFIED_NAMESPACE
          value: "default"
        - name: TIMEZONE
          value: "Asia/Tokyo"
        volumeMounts:
        - mountPath: /mnt/employee-list
          name: config-volume
          readOnly: true
      serviceAccountName: controller-manager
      terminationGracePeriodSeconds: 10
      volumes:
      - configMap:
          defaultMode: 420
          items:
          - key: Employeelist
            path: Employeelist
          name: employee-list
        name: config-volume      
---
apiVersion: v1
kind: ConfigMap
metadata: 
  name: employee-list
  namespace: system
data:
  Employeelist: |
    sample-user
    test-user1
    test-user2
    test-user3
    test-user4