导语：k8s使用nfs启动elasticsearch7.8

在nfs服务器上创建存放elasticsearch对应 data的文件夹 /es-data

mkdir /es-data
# 因为es需要用elasticsearch用户起 最方便就是给这个目录设置777权限  或者user设置诶id 1000的账号
chmod -R 777 /es-data 

设置权限

cat >> /etc/exports <<EOF
/es-data  192.168.0.0/16(rw,no_root_squash,sync)
EOF

exportfs  -r
exportfs

创建yaml文件

# configmap对应elasticsearch.yaml
cat > es-cm.yaml <<EOF
apiVersion: v1
kind: ConfigMap
metadata:
  name: es
  namespace: test
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: /.*/
EOF

# 创建pv和pvc
cat  > es-pvc.yaml <<EOF
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: elasticsearch-data-pv
  namespace: test
spec:
  capacity:
    storage: 50Gi
  accessModes:
  - ReadWriteMany
  persistentVolumeReclaimPolicy: Delete
  nfs:
    server: 192.168.1.171
    path: /es-data


---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: elasticsearch-data-pvc
  namespace: test
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 50Gi
EOF

# 创建deployment
cat > es-deploy.yaml <<EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  name: elasticsearch
  namespace: test
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:7.8.0
        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: cert-home
        persistentVolumeClaim:
          claimName: cert-pvc
      - name: elasticsearch-data
        persistentVolumeClaim:
          claimName: elasticsearch-data-pvc
      - name: es-config
        configMap:
          name: es
EOF

# 创建svc 使用nodeport访问
cat > es-svc.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  namespace: test
  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
EOF

应用yaml文件

kubectl apply -f ./

查看nfs挂载路径

访问nodeip+nodeport 测试

http://192.168.1.205:30105/