Kubernetes Deployment应用报错：未知字段spec.template.spec.volumes[0].PersistentVolumeClaim

你遇到的unknown field "spec.template.spec.volumes[0].PersistentVolumeClaim"错误，根源是YAML中定义PVC卷的字段大小写不符合Kubernetes API要求。

Kubernetes API里，引用PersistentVolumeClaim的字段名称是小写开头的persistentVolumeClaim，而你的YAML里写成了首字母大写的PersistentVolumeClaim，这会被识别为无效字段。

修正后的完整YAML如下：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app-service
  namespace: app-1-0
  labels:
    app: app-service
spec:
  replicas: 1
  selector:
    matchLabels:
      app: my-service
  template:
    metadata:
      labels:
        app: my-service
    spec:
      containers:
        - name: my-service
          image: registry.azurecr.io/app/app-service:1.0
          env:
          - name: AzureAd__Instance
            value: ...
          - name: AzureAd__ClientId
            value: ...
          - name: AzureAd__TenantId
            value: ...
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
              name: http
          volumeMounts:
            - mountPath: "/mnt/data"
              name: cache
      dnsPolicy: ClusterFirst
      volumes:
      - name: cache
        persistentVolumeClaim:
          claimName: app-pvc

注意：部分校验工具（比如kubeval）可能对字段大小写的检测不够严格，但Kubernetes集群的API Server会严格遵循官方API定义的字段格式。

内容的提问来源于stack exchange，提问作者Jester