1. 11.3 PersistentVolumeClaim（PVC）

PersistentVolumeClaim（PVC）是用户存储的请求。它与 Pod 相似。Pod 消耗节点资源，PVC 消耗 PV 资源。Pod 可以请求特定级别的资源（CPU 和内存）。声明可以请求特定的大小和访问模式（例如，可以以读/写一次或 只读多次模式挂载）。

1.创建PVC

[root@linux-node1 ~]# vim nfs-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-demo
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: nfs

创建并查看PVC

[root@linux-node1 ~]# kubectl create -f nfs-pvc.yaml 
persistentvolumeclaim "pvc-demo" created
[root@linux-node1 ~]# kubectl get pvc
NAME       STATUS    VOLUME    CAPACITY   ACCESS MODES   STORAGECLASS   AGE
pvc-demo   Bound     pv-demo   1Gi        RWO            nfs            6s

2.使用PVC

[root@linux-node1 ~]# vim nginx-deployment-pvc.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.13.12
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: pvc-demo
      volumes:
      - name: pvc-demo
        persistentVolumeClaim:
          claimName: pvc-demo