I have successfully connected the redis-slaves with the redis-master on Kubernetes using the .yaml manifest file that is deployed as pods on kubernetes.

But when I am trying to connect the redis-sentinel to master it gives connection refused "Could not connect to Redis at 127.0.0.1:26379: Connection refused not connected>"

Below is the redis master, slave and sentinel manifest file:

Redis-Master.yaml

kind: Deployment
metadata:
  labels:
    name: redis
    redis-sentinel: "true"
    role: master
  name: redis-master
spec:
  selector:
    matchLabels:
      app: redis
      role: master
      tier: backend
  replicas: 1
  template:
    metadata:
      labels:
        app: redis
        role: master
        tier: backend
    spec:
      containers:
      - name: master
        image: k8s.gcr.io/redis:e2e  # or just image: redis
        env:
          - name: MASTER
            value: "true"
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
        ports:
        - containerPort: 6379

Redis-Slave.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-slave
  labels:
    app: redis
    role: slave
    tier: backend
spec:
  strategy:
    type: RollingUpdate
  replicas: 3
  selector:
    matchLabels:
      app: redis
      role: slave
      tier: backend
  template:
    metadata:
      labels:
        app: redis
        role: slave
        tier: backend
    spec:
      containers:
        - name: slave
          image: gcr.io/google_samples/gb-redisslave:v3
          ports:
            - name: redis-server
              containerPort: 6379
          env:
            - name: ALLOW_EMPTY_PASSWORD
              value: "yes"
            - name: REDIS_REPLICATION_MODE
              value: slave
            - name: REDIS_MASTER_HOST
              value: redis-master
            - name: REDIS_MASTER_PORT_NUMBER
              value: "6379"

Redis-sentinel

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-sentinel
  labels:
    app: redis
    role: sentinel  
    tier: backend
spec:
  strategy:
    type: RollingUpdate
  replicas: 3
  selector:
    matchLabels:
      app: redis
      role: sentinel
      tier: backend
  template:
    metadata:
      labels:
        name: redis-sentinel
        redis-sentinel: "true"
        app: redis
        role: sentinel
        tier: backend
    spec:
      containers:
        - name: sentinel
          image: gcr.io/google_samples/gb-redisslave:v3
          ports:
            - name: redis-sentinel
              containerPort: 26379
          env:
            - name: ALLOW_EMPTY_PASSWORD
              value: "yes"
            - name: REDIS_REPLICATION_MODE
              value: sentinel
            - name: REDIS_MASTER_HOST
              value: redis-master
            - name: REDIS_MASTER_PORT_NUMBER
              value: "6379"   

Can you tell me where am I getting wrong with the redis-sentinel manifest file?