PV与PVC

1.Master安装nfs服务器

fxx3@kube-node-1:~$ sudo apt-get install nfs-kernel-server

2.Node安装nfs客户端

fxx3@kube-node-2:~$ sudo apt install nfs-common

3.创建共享路径

fxx2@kube-node-1:~/yaml$ cat /etc/exports   
/nfs/k8s 192.168.244.0/24(rw,sync,no_root_squash)

fxx2@kube-node-1:~/yaml$ mkdir -p /nfs/k8s/pv
fxx2@kube-node-1:~/yaml$ sudo systemctl start nfs-kernel-server && sudo systemctl enable nfs-kernel-server
fxx2@kube-node-1:~/yaml$ showmount -e
Export list for kube-node-1:
/nfs/k8s 192.168.244.0/24

4.创建pv

fxx2@kube-node-1:~/yaml$ cat nfs-pv1.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: mypv1
spec:
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle   #recycle：pvc回收后数据将被清理
                                           #retain：即使pvc被回收，数据不会被清理，需要手动清理
  storageClassName: nfs
  nfs:
    path: /nfs/k8s/pv
    server: 192.168.244.148

fxx2@kube-node-1:~/yaml$ sudo kubectl apply -f nfs-pv1.yaml
fxx2@kube-node-1:~/yaml$ kubectl get pv
NAME    CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM            STORAGECLASS   REASON   AGE
mypv1   10Gi       RWO            Recycle          Bound    default/mypvc1   nfs                     36m

5.创建pvc

fxx2@kube-node-1:~/yaml$ cat nfs-pvc1.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mypvc1
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs

fxx2@kube-node-1:~/yaml$ sudo kubectl apply -f nfs-pvc1.yaml
fxx2@kube-node-1:~/yaml$ sudo kubectl get pvc
NAME     STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
mypvc1   Bound    mypv1    10Gi       RWO            nfs            37m

6.pod挂载pvc

fxx2@kube-node-1:~/yaml$ cat pod1.yaml
apiVersion: v1
kind: Pod
metadata:
  name: mypod1
spec:
  containers:
    - name: mypod
      image: nginx:latest
      args:
      - /bin/sh
      - -c
      - sleep 3000
      volumeMounts:
      - mountPath: "/mydata"
        name: mydata
  volumes:
    - name: mydata
      persistentVolumeClaim:
        claimName: mypvc1

fxx2@kube-node-1:~/yaml$ sudo kubectl get pod -o wide
NAME     READY   STATUS    RESTARTS   AGE   IP            NODE          NOMINATED NODE   READINESS GATES
mypod1   1/1     Running   0          37m   10.244.0.48   kube-node-1   <none>           <none>

7.测试pvc是否可用

fxx2@kube-node-1:~/yaml$ kubectl exec mypod1 touch /mydata/hello.txt
fxx2@kube-node-1:~/yaml$ ll /nfs/k8s/pv/
total 8
drwxr-xr-x 2 root root 4096 Feb 17 22:07 ./
drwxr-xr-x 3 root root 4096 Feb 17 21:23 ../
-rw-r--r-- 1 root root    0 Feb 17 22:07 hello.txt