Kubernetes中的hostpath挂载方法后目录显示为空

问题描述

我正在尝试挂载位于/ mnt / rstudio中的名为rstudio的目录。但是，当我尝试使用永久卷进行挂载时，会显示目录，但不会显示rstudio中的文件。这是我的部署文件

apiVersion: apps/v1
kind: Deployment
metadata:
  name: rsp-deployment
spec:
  selector:
    matchLabels:
      app: rsp
  replicas: 1
  strategy: {}
  template:
    metadata:
      labels:
        app: rsp
    spec:
      nodeSelector:
        kubernetes.io/hostname: testserver.local
      volumes:
       - name: rsp-persistent-storage
         persistentVolumeClaim:
           claimName: pv-claim-rsp
      containers:
      - env:
        - name: RSP_LICENSE
          value: MY LICENSE
        image: rstudio/rstudio-server-pro:latest
        name: rstudio-server-pro
        ports:
        - containerPort: 8787
        - containerPort: 5559
        volumeMounts:
         - name: rsp-persistent-storage
           mountPath: /tmp/rstudio
        resources: {}
        securityContext:
          privileged: true
      restartPolicy: Always
status: {}

---
kind: Service
apiVersion: v1
metadata:
  name: rstudio-server-pro
spec:
  selector:
    app: rsp
  ports:
  - protocol: TCP
    name: "8787"
    port: 8787
    targetPort: 8787
  type: NodePort

我的pv和pvc文件如下

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-volume-rsp
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/rstudio"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-rsp
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: ""
  resources:
    requests:
      storage: 5Gi

/ mnt / rstudio里面有很多文件。

[root@test-server rstudio]# ls
launcher.conf                      launcher-mounts          launcher.pub        rserver.conf  
launcher.kubernetes.conf           launcher-mounts_working  logging.conf        rsession.conf 
launcher.kubernetes.profiles.conf  launcher.pem             notifications.conf  r-versions

但是在Pod启动并运行之后，目录显示为空。知道为什么吗？预先感谢！

解决方法

LGTM。如果我将图像与nginx交换，则会得到文件。我会检查两件事：

1. 权限：检查文件具有哪些权限。您可能必须更新权限或UID才能访问文件。
2. rstudio图片是否使用该路径？文件夹启动时可能正在处理该文件夹。尝试挂载到其他路径，看看是否可以看到文件。

此外，请确保在主机路径所在的节点上启动Pod。我假设testserver.local和test-server是相同的。

HTH

,

PVC是否使用您创建的PV？用

检查

kubectl get pvc

尝试在标签上添加标签，并使用matchLabels选择器以确保PVC实际上消耗了刚创建的PV：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-volume-rsp
  labels:
    name: pv-volume-rsp  # Added
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/rstudio"

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-rsp
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: ""
  resources:
    requests:
      storage: 5Gi
  selector:
    matchLabels:
      name: pv-volume-rsp  # Added