1. 规划

节点功能	节点IP	数据目录
服务端	192.168.99.210	/data
客户端	192.168.99.211

2. 搭建NFS服务

2.1 安装服务端

若NFS已搭建完成，可跳过此节。

在服务端节点上执行如下操作：

安装NFS、RPC服务

yum install -y nfs-utils rpcbind

创建共享目录

# 此处需要执行权限
mkdir /data

修改配置文件vim /etc/exports，添加如下内容

/data *(rw,sync,insecure,no_subtree_check,no_root_squash)

启动RPC，NFS服务

systemctl start rpcbind 
systemctl start nfs-server

systemctl enable rpcbind 
systemctl enable nfs-server

查看服务端是否正常加载配置文件

showmount -e localhost

# 有如下输出
Export list for localhost:
/data *

2.2 安装客户端

安装NFS客户端nfs-utils，所有k8s集群中的节点都执行以下安装：

yum install nfs-utils -y

查看服务端可共享的目录

# 192.168.99.210为NFS服务端IP，/data为NFS数据目录
showmount -e 192.168.99.210

# 有如下输出
Export list for 192.168.99.210:
/data *

3. 配置NFS作为K8S的存储类

3.1 创建provisioner

vim nfs-rbac.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-provisioner
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
   name: nfs-provisioner-runner
rules:
   -  apiGroups: [""]
      resources: ["persistentvolumes"]
      verbs: ["get", "list", "watch", "create", "delete"]
   -  apiGroups: [""]
      resources: ["persistentvolumeclaims"]
      verbs: ["get", "list", "watch", "update"]
   -  apiGroups: ["storage.k8s.io"]
      resources: ["storageclasses"]
      verbs: ["get", "list", "watch"]
   -  apiGroups: [""]
      resources: ["events"]
      verbs: ["watch", "create", "update", "patch"]
   -  apiGroups: [""]
      resources: ["services", "endpoints"]
      verbs: ["get","create","list", "watch","update"]
   -  apiGroups: ["extensions"]
      resources: ["podsecuritypolicies"]
      resourceNames: ["nfs-provisioner"]
      verbs: ["use"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-provisioner
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-provisioner-runner
  apiGroup: rbac.authorization.k8s.io
---
#vi nfs-deployment.yaml；创建nfs-client的授权
kind: Deployment
apiVersion: apps/v1
metadata:
   name: nfs-client-provisioner
spec:
   replicas: 1
   strategy:
     type: Recreate
   selector:
     matchLabels:
        app: nfs-client-provisioner
   template:
      metadata:
         labels:
            app: nfs-client-provisioner
      spec:
         serviceAccount: nfs-provisioner
         containers:
            -  name: nfs-client-provisioner
               image: gmoney23/nfs-client-provisioner:1.1
               volumeMounts:
                 -  name: nfs-client-root
                    mountPath:  /persistentvolumes
               env:
                 -  name: PROVISIONER_NAME #供应者的名字
                    value: storage.pri/nfs #名字虽然可以随便起，以后引用要一致
                 -  name: NFS_SERVER
                    value: 192.168.99.210
                 -  name: NFS_PATH
                    value: /data
         tolerations:
         - key: CriticalAddonsOnly
           operator: Exists
         - effect: NoSchedule
           key: node-role.kubernetes.io/master           
         volumes:
           - name: nfs-client-root
             nfs:
               server: 192.168.99.210
               path: /data

注意修改NFS服务端地址和数据目录

kubectl apply -f nfs-rbac.yaml

3.2 创建存储类

vim storageclass-nfs.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: storage-nfs
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: storage.pri/nfs
reclaimPolicy: Delete

存储类名称为：storage-nfs。

kubectl apply -f storageclass-nfs.yaml

3.3 验证nfs动态供应

vim pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc
 # annotations:
 #   volume.beta.kubernetes.io/storage-class: "storage-nfs"
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Gi
  volumeName: nfs-pv
  storageClassName: "storage-nfs"

vim testpod.yaml

kind: Pod
apiVersion: v1
metadata:
  name: test-pod
spec:
  containers:
  - name: test-pod
    image: busybox
    command:
      - "/bin/sh"
    args:
      - "-c"
      - "touch /mnt/SUCCESS && exit 0 || exit 1"
    volumeMounts:
      - name: nfs-pvc
        mountPath: "/mnt"
  restartPolicy: "Never"
  tolerations:
  - key: CriticalAddonsOnly
    operator: Exists
  - effect: NoSchedule
    key: node-role.kubernetes.io/master  
  volumes:
    - name: nfs-pvc
      persistentVolumeClaim:
        claimName: nfs-pvc

执行：

kubectl apply -f pvc.yaml
kubectl apply -f testpod.yaml

查看执行结果：