kuberntes 使用nfs配置持久性存储 pv，pvc，以及pod的使用

持久性存储

pv(PersistentVolume):基于全局，所有的namespace都可以看到并使用
pvc(PersistentVolumeClaims):基于namespace
详细信息：https://kubernetes.io/docs/concepts/storage/persistent-volumes/

使用nfs配置pv持久性存储

nfs server：192.168.199.101:/pv01 #详细nfs搭建教程https://www.jianshu.com/p/e9891e29ec6b

vim pv01.yaml 

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv0001
spec:
  capacity:
    storage: 5Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: slow
  nfs:
    path: /pv01
    server: 192.168.199.101

#创建pv01
kubectl apply -f pv01.yaml

#获取pv
kubectl get pv

#查看pv信息
kubectl describe pv pv0001

在pv上配置pvc

vim pvc01.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: myclaim
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 5Gi
  #storageClassName 要和pv的相同，才能使用同一块存储
  storageClassName: slow

#创建pvc01
kubectl apply -f pvc01.yaml

#获取pvc
kubectl get pvc

pod使用pvc

vim nginx-pvc.yaml

kind: Pod
apiVersion: v1
metadata:
  name: web-nginx
spec:
  containers:
    - name: web
      image: nginx
      volumeMounts:
      - mountPath: "/var/www/html"
        name: mypd
  volumes:
    - name: mypd
      persistentVolumeClaim:
        claimName: myclaim

#创建pod
kubectl apply -f nginx-pvc.yaml