[kubernetes]-k8s运行单点elasticsearch7.x

古城微笑少年丶 2022-10-26 04:00 147阅读 0赞

##### 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 ./

![650bc5387d83e9be9d9abd02533f1afb.png][]

##### 查看nfs挂载路径 #####

![a29ebc936978e3028a1bc503892509ab.png][]

##### 访问nodeip+nodeport 测试 #####

http://192.168.1.205:30105/

![c5bf64e92308e6f0e027197222f43d67.png][]

[650bc5387d83e9be9d9abd02533f1afb.png]: /images/20221024/895c72df06894206b4d9c7c5ef0c8e9d.png
[a29ebc936978e3028a1bc503892509ab.png]: /images/20221024/dbe39ac0a7a44caf8ebf375896ae51ef.png
[c5bf64e92308e6f0e027197222f43d67.png]: /images/20221024/7d4ec2ce601c466f8a7d023932628173.png