Elasticsearch StatefulSet Example

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  labels:
    app: elasticsearch
    chart: elasticsearch-1.17.0
    component: master
    heritage: Tiller
    release: elasticsearch
  name: elasticsearch-master
  namespace: elasticsearch
spec:
  replicas: 3
  serviceName: elasticsearch-master
  template:
    metadata:
      labels:
        app: elasticsearch
        component: master
        release: elasticsearch
        role: master
    spec:
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - podAffinityTerm:
              labelSelector:
                matchLabels:
                  app: elasticsearch
                  component: master
                  release: elasticsearch
              topologyKey: kubernetes.io/hostname
            weight: 1
      containers:
      - env:
        - name: NODE_DATA
          value: "false"
        - name: DISCOVERY_SERVICE
          value: elasticsearch-discovery
        - name: PROCESSORS
          valueFrom:
            resourceFieldRef:
              resource: limits.cpu
        - name: ES_JAVA_OPTS
          value: '-Djava.net.preferIPv4Stack=true -Xms512m -Xmx512m  '
        - name: MINIMUM_MASTER_NODES
          value: "2"
        image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.5.4
        imagePullPolicy: IfNotPresent
        name: elasticsearch
        ports:
        - containerPort: 9300
          name: transport
        readinessProbe:
          httpGet:
            path: /_cluster/health?local=true
            port: 9200
          initialDelaySeconds: 5
        resources:
          limits:
            cpu: "1"
          requests:
            cpu: 25m
            memory: 512Mi
        volumeMounts:
        - mountPath: /usr/share/elasticsearch/data
          name: data
        - mountPath: /usr/share/elasticsearch/config/elasticsearch.yml
          name: config
          subPath: elasticsearch.yml
      initContainers:
      - command:
        - sysctl
        - -w
        - vm.max_map_count=262144
        image: busybox:latest
        imagePullPolicy: Always
        name: sysctl
        resources: {}
        securityContext:
          privileged: true
      - command:
        - /bin/bash
        - -c
        - |
          set -e; set -x; chown elasticsearch:elasticsearch /usr/share/elasticsearch/data; for datadir in $(find /usr/share/elasticsearch/data -mindepth 1 -maxdepth 1 -not -name ".snapshot"); do
            chown -R elasticsearch:elasticsearch $datadir;
          done; chown elasticsearch:elasticsearch /usr/share/elasticsearch/logs; for logfile in $(find /usr/share/elasticsearch/logs -mindepth 1 -maxdepth 1 -not -name ".snapshot"); do
            chown -R elasticsearch:elasticsearch $logfile;
          done
        image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.5.4
        imagePullPolicy: IfNotPresent
        name: chown
        resources: {}
        securityContext:
          runAsUser: 0
        volumeMounts:
        - mountPath: /usr/share/elasticsearch/data
          name: data
      securityContext:
        fsGroup: 1000
      serviceAccountName: elasticsearch-master
      volumes:
      - configMap:
          name: elasticsearch
        name: config
  updateStrategy:
    type: OnDelete
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 4Gi
      storageClassName: managed-premium