NFS（Network File System）即网络文件系统，是FreeBSD支持的文件系统中的一种，它允许网络中的计算机之间通过TCP/IP网络共享资源。

环境

nfs server安装

[root@master-192 nfs]#yum install -y nfs-utils

[root@master-192 nfs]# cat /etc/exports
/data/nfs *(rw,all_squash,anonuid=65534,anongid=65534)
[root@master-192 nfs]# systemctl restart nfs-server
[root@master-192 nfs]# systemctl enable nfs-server

nfs client安装

[root@node-193 ~]# yum install -y nfs-utils

验证

[root@master-192 nfs]# mount -t nfs 172.30.81.192:/data/nfs /mnt

k8s使用nfs

1.创建pv，pv是没有namspace概念的

[root@master-192 nfs]# kubectl create -f pv.yaml

[root@master-192 nfs]# cat pv.yaml 
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv
  namespace: storage
spec:
  capacity:
    storage: 100Mi
  accessModes:
    - ReadWriteMany
  nfs:
    # FIXME: use the right IP
    server: 172.30.81.192
    path: "/data/nfs"

2.创建pvc
[root@master-192 nfs]# kubectl create -f pvc.yaml

[root@master-192 nfs]# cat pvc.yaml 
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: nfs-pvc
  namespace: default
spec:
  accessModes:
    - ReadWriteMany
  storageClassName: ""
  resources:
    requests:
      storage: 90Mi

3.验证

[root@master-192 nfs]# kubectl get pv
NAME     CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM             STORAGECLASS   REASON   AGE
nfs-pv   100Mi      RWX            Retain           Bound    default/nfs-pvc                           11s
[root@master-192 nfs]# kubectl get pvc
NAME      STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
nfs-pvc   Bound    nfs-pv   100Mi      RWX                           6s

4.使用pvc

[root@master-192 nfs]# kubectl create -f deploy.yaml

[root@master-192 nfs]# cat deploy.yaml 
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
 name: test1
spec:
 replicas: 1
 template:
   metadata:
     labels:
       app: test1
   spec:
     containers:
     - name: test1
       image: nginx
       volumeMounts:
       - name: nfs
         mountPath: /usr/share/nginx/html
     volumes:
     - name: nfs
       persistentVolumeClaim:
         claimName: nfs-pvc
       
     nodeSelector:
       kubernetes.io/hostname: node-193

--- 
apiVersion: v1
kind: Service
metadata:
 labels:
   app: test1
 name: test1
 namespace: default
spec:
 selector:
   app: test1
 ports:
   - port: 80
 type: NodePort
 clusterIP: 10.96.76.104