如何为我的部署定义持久存储声明？

Question

我收到此错误消息：

Deployment.apps "nginxapp" is invalid: spec.template.spec.containers[0].volumeMounts[0].name: Not found: "nginx-claim"

现在，我认为部署要求使用持久存储，所以这些是我按顺序运行的 det 文件：

首先，将卷持久化到 /data，因为它在 minikube (https://minikube.sigs.k8s.io/docs/handbook/persistent_volumes/) 上持久化：

apiVersion: v1
kind: PersistentVolume

metadata:
  name: small-pv

spec:

  capacity:
    storage: 1Gi

  accessModes:
  - ReadWriteOnce

  persistentVolumeReclaimPolicy: Retain

  storageClassName: local-storage

  local:
    path: /data

  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - my-node

然后，对于我的 nginx 部署，我提出了一个声明：

apiVersion: v1
kind: PersistentVolumeClaim

metadata:
  name: nginx-claim

spec:
  storageClassName: manual

  accessModes:
    - ReadWriteOnce

  resources:
    requests:
      storage: 1Gi

在服务之前我运行部署，这是给我上面的错误，看起来像这样：

apiVersion: apps/v1
kind: Deployment

metadata:
  labels:
    app: nginxapp

  name: nginxapp

spec:
  replicas: 1

  volumes:
    - persistentVolumeClaim:
        claimName: nginx-claim

  selector:
    matchLabels:
      app: nginxapp

  template:
    metadata:
      labels:
        app: nginxapp

    spec:
      containers:
      - name: nginx
        image: nginx:latest
        
        ports:
        - containerPort: 80

        volumeMounts:
        - mountPath: "/data/www"
          name: nginx-claim

1. 我哪里做错了？不是部署 -> 卷声明 -> 卷吗？

2. 我做得对吗？持久卷是 pod 范围的 (?)，因此通常被命名。但索赔是每次部署？所以这就是为什么我把它命名为nginx-claim。我可能在这里弄错了，但不应该让这个简单的运行 doh 出错。

3. 在我的部署中，我设置了mountPath: "/data/www"，这应该遵循已在持久卷定义中设置的目录，还是在此基础上构建？所以就我而言，我得到/data/data/www?

Answer 1

尝试更改为：

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nginx-claim
spec:
  storageClassName: local-storage  # <-- changed
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

在您的部署规范中添加：

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginxapp
  name: nginxapp
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginxapp
  template:
    metadata:
      labels:
        app: nginxapp
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        volumeMounts:
        - name: nginx-claim
          mountPath: "/data/www"      
      volumes:
      - name: nginx-claim  # <-- added
        persistentVolumeClaim:
          claimName: nginx-claim

Answer 2

部署清单中的volumes: 下似乎缺少name:。您能否在部署清单中尝试以下操作：

  volumes:
    - name: nginx-claim
      persistentVolumeClaim:
        claimName: nginx-claim

Here 是文档。