持久存储 - Pi K8s 集群 - 不支持 NFS 版本传输协议

Question

我有一个由 1-Master 20-Nodes 组成的 Raspberry Pi 集群：

• 192.168.0.92（主）
• 192.168.0.112（带 USB 驱动器的节点）

我将 USB 驱动器安装到 /media/hdd 并为其设置标签 - purpose=volume。

使用以下我能够设置 NFS 服务器：

apiVersion: v1
kind: Namespace
metadata:
  name: storage
  labels:
    app: storage
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: local-pv
  namespace: storage
spec:
  capacity:
    storage: 3.5Ti
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /media/hdd
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: purpose
          operator: In
          values:
          - volume
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-claim
  namespace: storage
spec:
  accessModes:
  - ReadWriteOnce
  storageClassName: local-storage
  resources:
    requests:
      storage: 3Ti
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-server
  namespace: storage
  labels:
    app: nfs-server
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nfs-server
  template:
    metadata:
      labels:
        app: nfs-server
        name: nfs-server
    spec:
      containers:
      - name: nfs-server
        image: itsthenetwork/nfs-server-alpine:11-arm
        env:
          - name: SHARED_DIRECTORY
            value: /exports
        ports:
          - name: nfs
            containerPort: 2049
          - name: mountd
            containerPort: 20048
          - name: rpcbind
            containerPort: 111
        securityContext:
          privileged: true
        volumeMounts:
          - mountPath: /exports
            name: mypvc
      volumes:
        - name: mypvc
          persistentVolumeClaim:
            claimName: local-claim
      nodeSelector:
        purpose: volume
---
kind: Service
apiVersion: v1
metadata:
  name: nfs-server
  namespace: storage
spec:
  ports:
    - name: nfs
      port: 2049
    - name: mountd
      port: 20048
    - name: rpcbind
      port: 111
  clusterIP: 10.96.0.11
  selector:
    app: nfs-server

我什至可以用这个制作一个持久的卷：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-nfs-volume
  labels:
    directory: mysql
spec:
  capacity:
    storage: 200Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: slow
  nfs:
    path: /mysql
    server: 10.244.19.5
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-nfs-claim
spec:
  storageClassName: slow
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 100Gi
  selector:
    matchLabels:
      directory: mysql

但是当我尝试像这样使用音量时：

apiVersion: v1
kind: Service
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mysql
  clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress-mysql
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-pass
              key: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-nfs-claim

我收到 NFS 版本传输协议不支持错误。

Answer 1

看到mount.nfs: requested NFS version or transport protocol is not supported错误主要有以下三个原因：

1. NFS 服务未在 NFS 服务器上运行
2. 客户端上未安装 NFS 实用程序
3. NFS 服务挂在 NFS 服务器上

根据this artice，有三种解决方案可以解决您的错误问题。

第一个：

登录 NFS 服务器并检查 NFS 服务状态。如果以下命令 service nfs status 返回 NFS 服务在服务器上停止的信息 - 只需使用 service nfs start 启动它们。要在客户端上挂载 NFS 共享，请使用相同的命令。

第二个：

如果在尝试第一个解决方案后您的问题仍未解决

在您的服务器上尝试installing package nfs-utils。

第三个：

打开文件/etc/sysconfig/nfs 并尝试检查以下参数

# Turn off v4 protocol support
#RPCNFSDARGS="-N 4"
# Turn off v2 and v3 protocol support
#RPCNFSDARGS="-N 2 -N 3"

从RPCNFSDARGS 行中删除哈希将关闭特定版本的支持。这样，具有上述 NFS 版本的客户端将无法连接到 NFS 服务器以安装共享。如果您启用了其中任何一项，请尝试禁用它并在 NFS 服务器服务重新启动后在客户端挂载。