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接上篇 Kubernetes 中部署 NFS Provisioner 为 NFS 提供动态分配卷（上篇）请添加链接描述

一、nginx 使用 nfs 静态 PV 1、静态 nfs-static-nginx-rc.yaml ##清理资源 kubectl delete -f nfs-static-nginx-rc.yaml -n test cat >nfs-static-nginx-rc.yaml<<\EOF ##创建namespace --- apiVersion: v1 kind: Namespace metadata: name: test labels: name: test ##创建nfs-pv --- apiVersion: v1 kind: PersistentVolume metadata: name: nfs-pv labels: pv: nfs-pv spec: capacity: storage: 10Gi accessModes: - ReadWriteMany persistentVolumeReclaimPolicy: Retain storageClassName: nfs # 注意这里使用nfs的storageClassName，如果没改k8s的默认storageClassName的话，这里可以省略 nfs: path: /data/nfs/nginx/ server: 10.198.1.155 ##创建nfs-pvc --- kind: PersistentVolumeClaim apiVersion: v1 metadata: name: nfs-pvc namespace: test labels: pvc: nfs-pvc spec: accessModes: - ReadWriteMany resources: requests: storage: 10Gi storageClassName: nfs selector: matchLabels: pv: nfs-pv ##部署应用nginx --- apiVersion: v1 kind: ReplicationController metadata: name: nginx-test namespace: test labels: name: nginx-test spec: replicas: 2 selector: name: nginx-test template: metadata: labels: name: nginx-test spec: containers: - name: nginx-test image: docker.io/nginx volumeMounts: - mountPath: /usr/share/nginx/html name: nginx-data ports: - containerPort: 80 volumes: - name: nginx-data persistentVolumeClaim: claimName: nfs-pvc ##创建service --- apiVersion: v1 kind: Service metadata: namespace: test name: nginx-test labels: name: nginx-test spec: type: NodePort ports: - port: 80 protocol: TCP targetPort: 80 name: http nodePort: 30080 selector: name: nginx-test EOF ##创建资源 kubectl apply -f nfs-static-nginx-rc.yaml -n test ##查看pv资源 kubectl get pv -n test --show-labels ##查看pvc资源 kubectl get pvc -n test --show-labels ##查看pod $ kubectl get pods -n test NAME READY STATUS RESTARTS AGE nginx-test-r4n2j 1/1 Running 0 54s nginx-test-zstf5 1/1 Running 0 54s #可以看到，nginx应用已经部署成功。 #nginx应用的数据目录是使用的nfs共享存储，我们在nfs共享的目录里加入index.html文件，然后再访问nginx-service暴露的端口 #切换到到nfs-server服务器上 echo "Test NFS Share discovery with nfs-static-nginx-rc" > /data/nfs/nginx/index.html #在浏览器上访问kubernetes主节点的 :30080，就能访问到这个页面内容了 2、静态 nfs-static-nginx-deployment.yaml ##清理资源 kubectl delete -f nfs-static-nginx-deployment.yaml -n test cat >nfs-static-nginx-deployment.yaml<<\EOF ##创建namespace --- apiVersion: v1 kind: Namespace metadata: name: test labels: name: test ##创建nfs-pv --- apiVersion: v1 kind: PersistentVolume metadata: name: nfs-pv labels: pv: nfs-pv spec: capacity: storage: 10Gi accessModes: - ReadWriteMany persistentVolumeReclaimPolicy: Retain storageClassName: nfs # 注意这里使用nfs的storageClassName，如果没改k8s的默认storageClassName的话，这里可以省略 nfs: path: /data/nfs/nginx/ server: 10.198.1.155 ##创建nfs-pvc --- kind: PersistentVolumeClaim apiVersion: v1 metadata: name: nfs-pvc namespace: test labels: pvc: nfs-pvc spec: accessModes: - ReadWriteMany resources: requests: storage: 10Gi storageClassName: nfs selector: matchLabels: pv: nfs-pv ##部署应用nginx --- apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment namespace: test labels: name: nginx-test spec: replicas: 2 selector: matchLabels: name: nginx-test template: metadata: labels: name: nginx-test spec: containers: - name: nginx-test image: docker.io/nginx volumeMounts: - mountPath: /usr/share/nginx/html name: nginx-data ports: - containerPort: 80 volumes: - name: nginx-data persistentVolumeClaim: claimName: nfs-pvc ##创建service --- apiVersion: v1 kind: Service metadata: namespace: test name: nginx-test labels: name: nginx-test spec: type: NodePort ports: - port: 80 protocol: TCP targetPort: 80 name: http nodePort: 30080 selector: name: nginx-test EOF ##创建资源 kubectl apply -f nfs-static-nginx-deployment.yaml -n test ##查看pv资源 kubectl get pv -n test --show-labels ##查看pvc资源 kubectl get pvc -n test --show-labels ##查看pod $ kubectl get pods -n test NAME READY STATUS RESTARTS AGE nginx-deployment-64d6f78cdf-8bw8t 1/1 Running 0 55s nginx-deployment-64d6f78cdf-n5n4q 1/1 Running 0 55s #可以看到，nginx应用已经部署成功。 #nginx应用的数据目录是使用的nfs共享存储，我们在nfs共享的目录里加入index.html文件，然后再访问nginx-service暴露的端口 #切换到到nfs-server服务器上 echo "Test NFS Share discovery with nfs-static-nginx-deployment" > /data/nfs/nginx/index.html #在浏览器上访问kubernetes主节点的 :30080，就能访问到这个页面内容了 3、nginx?多目录挂载

PV 和 PVC 是一一对应关系，当有 PV 被某个 PVC ?所占用时，会显示 banding，其它 PVC 不能再使用绑定过的 PV。

PVC 一旦绑定 PV，就相当于是一个存储卷，此时 PVC 可以被多个? Pod 所使用。（PVC支不支持被多个 Pod 访问，取决于访问模型? ?accessMode 的定义）。

PVC 若没有找到合适的 PV 时，则会处于 pending 状态。

PV 是属于集群级别的，不能定义在名称空间中。