k8s 部署 elasticsearch 单节点

es.yaml

# pv和pvc
apiVersion: v1
kind: PersistentVolume
metadata:
  name: es-pv
spec:
  capacity:
    storage: 5Gi
  accessModes:
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  storageClassName: es-host
  hostPath:
    path: /data/es-data
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: es-pvc
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 5Gi
  storageClassName: es-host
---


apiVersion: v1
kind: ConfigMap
metadata:
  name: es
data:
  elasticsearch.yml: |
    cluster.name: my-cluster
    node.name: node-1
    node.max_local_storage_nodes: 3
    network.host: 0.0.0.0
    http.port: 9200
    discovery.seed_hosts: ["127.0.0.1", "[::1]"]
    cluster.initial_master_nodes: ["node-1"]
    http.cors.enabled: true
    http.cors.allow-origin: /.*/
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: elasticsearch
spec:
  selector:
    matchLabels:
      name: elasticsearch
  replicas: 1
  template:
    metadata:
      labels:
        name: elasticsearch
    spec:
      initContainers:
      - name: init-sysctl
        image: busybox
        command:
        - sysctl
        - -w
        - vm.max_map_count=262144
        securityContext:
          privileged: true
      containers:
      - name: elasticsearch
        image: elasticsearch:7.6.2
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            cpu: 1000m
            memory: 2Gi
          requests:
            cpu: 100m
            memory: 1Gi
        env:
        - name: ES_JAVA_OPTS
          value: -Xms512m -Xmx512m
        ports:
        - containerPort: 9200
        - containerPort: 9300
        volumeMounts:
        - name: elasticsearch-data
          mountPath: /usr/share/elasticsearch/data/
        - name: es-config
          mountPath: /usr/share/elasticsearch/config/elasticsearch.yml
          subPath: elasticsearch.yml
      volumes:
      - name: elasticsearch-data
        persistentVolumeClaim:
          claimName: es-pvc
        # hostPath:
          # path: /data/es
      - name: es-config
        configMap:
          name: es

---

apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  labels:
    name: elasticsearch
spec:
  type: NodePort
  ports:
  - name:  web-9200
    port: 9200
    targetPort: 9200
    protocol: TCP
    nodePort: 30105
  - name:  web-9300
    port: 9300
    targetPort: 9300
    protocol: TCP
    nodePort: 30106
  selector:
    name: elasticsearch

验证

curl -XGET 'http://172.30.4.218:9200'  #可以先pod再service