持久存储 - Pi K8s 集群 - 不支持 NFS 版本传输协议

Question

我有一个 Raspberry Pi 集群，由 1-Master 20-Nodes 组成：

192.168.0.92（硕士）
192.168.0.112（带 USB 驱动器的节点）

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

使用以下方法我能够设置 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持久卷：

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 版本传输协议不受支持的错误。

Answer 1

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

NFS services are not running on NFS server

NFS utils not installed on the client

NFS service hung on NFS server

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，查看NFS服务状态。如果以下命令 service nfs status returns 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

try installing package nfs-utils on your server.

第三个：

Open file /etc/sysconfig/nfs and try to check below parameters

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

Removing hash from RPCNFSDARGS lines will turn off specific version support. This way clients with mentioned NFS versions won’t be able to connect to the NFS server for mounting share. If you have any of it enabled, try disabling it and mounting at the client after the NFS server service restarts.

持久存储 - Pi K8s 集群 - 不支持 NFS 版本传输协议

Persistent Storage - Pi K8s Cluster - NFS version transport protocol not supported

kubernetes

raspberry-pi

persistent-volumes

persistent-volume-claims