Kubernetes hostPath 卷不显示文件

Question

我正在尝试创建 PersistentVolume 来与 pod 共享 ma​​ster 上(而不是节点上) 上的目录，为此，我使用以下 .yaml:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteMany
  hostPath:
    path: "/home/myhostuser/shared"

我有以下 Deployment .yaml，我尝试使用上面共享的内容，如下所示:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  selector:
    matchLabels:
      app: my-app
      replicas: 1
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app
        image: my-app-image 
        volumeMounts:
         - mountPath: /shared_host_path
           name: my-volume
        securityContext:
          privileged: true      
        ports:
        - containerPort: 5000
      volumes:
      - name: my-volume
        hostPath: 
        # directory location on host
          path: "/home/myhostuser/shared/"

当我尝试在主机上运行ls/home/myhostuser/shared时，除了我看到文件，但当我运行ls/shared_host_path时code> 在 pod 内我看不到文件。

我做错了什么？

Answer 1

如果您想在主服务器上拥有该卷，则必须在 persistedVolume 规范中指定它，如下所示

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteMany
  local:
    path: /home/myhostuser/shared
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - master

这就是 Kubernetes 调度程序如何理解此 PersistentVolume 与特定节点绑定(bind)的方式