EFK集群Pod重启后数据丢失的持久化问题排查请求

各位好，我在搭建EFK集群时碰到了一个棘手的问题——Pod重启后所有数据都会丢失！目前我已经部署了master、data和client三种角色的Pod，麻烦大家帮忙看看下面的master节点配置，帮我排查下数据持久化的问题出在哪里。

master.yaml 配置内容 #

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: infra
  name: elasticsearch-master
  labels:
    app: elasticsearch
    role: master
spec:
  replicas: 1
  selector:
    matchLabels:
      app: elasticsearch
      role: master
  template:
    metadata:
      labels:
        app: elasticsearch
        role: master
    spec:
      containers:
      - name: elasticsearch-master
        image: docker.elastic.co/elasticsearch/elasticsearch:7.17.0
        env:
        - name: CLUSTER_NAME
          value: elasticsearch
        - name: NODE_NAME
          value: elasticsearch-master
        - name: NODE_LIST
          value: elasticsearch-master,elasticsearch-data,elasticsearch-client
        - name: MASTER_NODES
          value: elasticsearch-master
        - name: "ES_JAVA_OPTS"
          # 注：原配置此处内容未完整展示，若有补充信息我会后续提供

备注：内容来源于stack exchange，提问作者Wagh