StatefulSet definition for redis cluster in K8s

redis.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: redis
  namespace: redis
spec:
  serviceName: redis
  replicas: 6   # 6 replicas, 3 master and 3 replicas(slaves)
  selector:
    matchLabels:
      app: redis
  template:
    metadata:
      labels:
        app: redis
    spec:
      initContainers:
      - name: config
        image: redis:7.0.0-alpine
        command: [ "sh", "-c" ]
        args:
          - |
            if [ -f "/conf/redis.conf" ]; then
              echo "config exists /conf/redis.conf .. not creating new"
            else
              echo "config doesn't exist copying to /conf/redis.conf"
              cp /tmp/conf/redis.conf /conf/redis.conf
            fi
        volumeMounts:
        - name: storage
          subPath: conf
          mountPath: /conf
        - name: config
          mountPath: /tmp/conf/
      containers:
      - name: redis
        image: redis:7.0.0-alpine
        command: ["redis-server"]
        args: ["/conf/redis.conf"]
        resources:
          requests:
            memory: "100M"
          limits:
            memory: "2000M"
        ports:
        - containerPort: 6379
          name: redis
        volumeMounts:
        - name: storage
          mountPath: /data
          subPath: data
        - name: storage
          mountPath: /conf
          subPath: conf
        - name: config-acl
          mountPath: /conf/acl/
      volumes:
      - name: config
        configMap:
          name: redis-config
      - name: config-acl
        configMap:
          name: redis-acl
  volumeClaimTemplates:
  - metadata:
      name: storage
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 50Mi