elasticsearch - Minikube-无法从 Elasticsearch 获得任何结果，如果它使用现有索引

Question

我试图将现有的本地 flex 搜索索引加载到 kubernetes (版本- minikube v1.9.2 ) flex 搜索 Pane 中。

我最终了解的是，我必须使用 mountpath 和 hostpath 组合来执行此操作。如果要提供自定义索引文件(不是默认索引文件)，则必须使用 configMap 覆盖 config / elasticsearch.yml 的 path.data

我做了以下操作，它在安装路径中创建了一个目录，并更新了 config / elasticsearch.yml 文件，但安装路径目录不包含主机路径目录的内容。

我不知道背后的原因。可以让我知道我在做什么错吗？

然后我去了头并手动 使用以下命令将索引从本地主机复制到kubernetes pod

kubectl cp localelasticsearhindexdirectory podname:/data/elk/

但是后来我尝试进行 flex 搜索，它给了我空结果(即使索引是手动复制的)。

如果我对本地 flex 搜索使用相同的索引(而不是在kubernetes上)，则可以得到结果。

有人可以提供一些建议来诊断以下问题吗

为什么安装路径没有hostpjths内容

如何调试/我应该遵循哪些步骤才能理解为什么pod上的elasticsearch无法获得结果？

kind: Deployment
metadata:
  name: elasticsearch
spec:
  selector:
    matchLabels:
      run: elasticsearch
  replicas: 1
  template:
    metadata:
      labels:
        run: elasticsearch
    spec:
      containers:
        - image: docker.elastic.co/elasticsearch/elasticsearch:6.6.1
          name: elasticsearch
          imagePullPolicy: IfNotPresent
          env:
            - name: discovery.type
              value: single-node
            - name: cluster.name
              value: elasticsearch
          ports:
          - containerPort: 9300
            name: nodes
          - containerPort: 9200
            name: client
          volumeMounts:
          - name: storage
            mountPath: /data/elk
          - name: config-volume
            mountPath: /usr/share/elasticsearch/config/elasticsearch.yml
            subPath: elasticsearch.yml
      volumes:
      - name: config-volume
        configMap:
         name: elasticsearch-config
      - name: storage
        hostPath:
         path: ~/elasticsearch-6.6.1/data     
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: elasticsearch-config
data:
  elasticsearch.yml: |
    cluster:
      name: ${CLUSTER_NAME:elasticsearch-default}

    node:
      master: ${NODE_MASTER:true}
      data: ${NODE_DATA:true}
      name: ${NODE_NAME:node-1}
      ingest: ${NODE_INGEST:true}
      max_local_storage_nodes: ${MAX_LOCAL_STORAGE_NODES:1}

    processors: ${PROCESSORS:1}

    network.host: ${NETWORK_HOST:_site_}

    path:
      data: ${DATA_PATH:"/data/elk"}
      repo: ${REPO_LOCATIONS:[]}

    bootstrap:
      memory_lock: ${MEMORY_LOCK:false}

    http:
      enabled: ${HTTP_ENABLE:true}
      compression: true
      cors:
        enabled: true
        allow-origin: "*"

    discovery:
      zen:
        ping.unicast.hosts: ${DISCOVERY_SERVICE:elasticsearch-discovery}
        minimum_master_nodes: ${NUMBER_OF_MASTERS:1}

    xpack:
      license.self_generated.type: basic            ```


**service.yaml**


```apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  labels:
    service: elasticsearch
spec:
  ports:
    - name: client
      port: 9200
      protocol: TCP
      targetPort: 9200
    - name: nodes
      port: 9300
      protocol: TCP
      targetPort: 9300
  type: NodePort

  selector:
    run: elasticsearch```

Answer 1

HostPath with minikube - Kubernetes中的解决方案为我工作。
要将本地目录挂载到minikube(版本-v1.9.2)中的pod中，您必须将该本地目录挂载到minikube中，然后在hostpath中使用minikube挂载路径
(https://minikube.sigs.k8s.io/docs/handbook/mount/)。

 minikube mount ~/esData:/indexdata
📁  Mounting host path /esData into VM as /indexdata ...
    ▪ Mount type:   <no value>
    ▪ User ID:      docker
    ▪ Group ID:     docker
    ▪ Version:      9p2000.L
    ▪ Message Size: 262144
    ▪ Permissions:  755 (-rwxr-xr-x)


       ▪ Options:      map[]
        ▪ Bind Address: 192.168.5.6:55230
    🚀  Userspace file server: ufs starting
    ✅  Successfully mounted ~/esData to /indexdata

📌  NOTE: This process must stay alive for the mount to be accessible ...

您必须在单独的终端中运行minikube挂载，因为它会启动一个进程并一直停留在该进程中，直到您卸载为止。

现在，我不再以原始问题中的“部署”方式进行操作，而是以Statefulset的方式进行处理，但是相同的解决方案也适用于“部署”。

我在安装过程中遇到的另一个问题是 flex 搜索服务器Pod抛出了 java.nio.file.AccessDeniedException: /usr/share/elasticsearch/data/nodes。然后，我看到 here，我必须使用 initContainers 在/ usr / share / elasticsearch / data / nodes中设置完全权限。

请参阅我的最终Yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch
spec:
  serviceName: "elasticsearch"
  replicas: 1
  selector:
    matchLabels:
      app: elasticsearch
  template:
    metadata:
      labels:
        app: elasticsearch
    spec:
      initContainers:
      - name: set-permissions
        image: registry.hub.docker.com/library/busybox:latest
        command: ['sh', '-c', 'mkdir -p /usr/share/elasticsearch/data && chown 1000:1000 /usr/share/elasticsearch/data' ]
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
      containers:
      - name: elasticsearch
        image: docker.elastic.co/elasticsearch/elasticsearch:6.6.1
        env:
        - name: discovery.type
          value: single-node
        ports:
        - containerPort: 9200
          name: client
        - containerPort: 9300
          name: nodes
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
      volumes:
      - name: data
        hostPath:
          path: /indexdata
---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  labels:
    service: elasticsearch
spec:
  ports:
  - port: 9200
    name: client
  - port: 9300
    name: nodes
  type: NodePort  
  selector:
    app: elasticsearch