如何挂载及使用CPFS1.0静态存储卷-阿里云帮助中心

CPFS（Cloud Paralleled File System）是一种并行文件系统。CPFS的数据存储在集群中的多个数据节点，并可由多个客户端同时访问，从而能够为大型高性能计算机集群提供高IOPS、高吞吐、低时延的数据存储服务。本文演示如何挂载及使用CPFS1.0静态存储卷。

背景信息

阿里云容器服务ACK的CSI支持静态存储卷挂载和动态存储卷挂载两种方式挂载CPFS1.0存储卷。在静态存储卷挂载的方式中，通常需要手动编辑和创建一个PV和PVC进行挂载，当需要的PV和PVC数量很大的时候，手动创建就显得非常繁琐了，这时动态存储卷挂载的功能可以满足您的需求。本文演示如何在ACK集群中使用alibaba-cloud-csi-driver挂载CPFS1.0存储卷，请参见alibaba-cloud-csi-driver。

注意文件存储CPFS已全面升级CPFS2.0，容器服务ACK不再新增支持使用CPFS1.0存储卷。

操作步骤

部署CSI-CPFS组件。

如果您需要挂载CPFS1.0存储卷，需要按照以下步骤在ACK集群中先部署cpfs-plugin组件。

apiVersion: storage.k8s.io/v1
kind: CSIDriver
metadata:
  name: cpfsplugin.csi.alibabacloud.com
spec:
  attachRequired: false
  podInfoOnMount: true
---
# This YAML defines all API objects to create RBAC roles for csi node plugin.
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: csi-cpfsplugin
  namespace: kube-system
spec:
  selector:
    matchLabels:
      app: csi-cpfsplugin
  template:
    metadata:
      labels:
        app: csi-cpfsplugin
    spec:
      tolerations:
      - operator: Exists
      priorityClassName: system-node-critical
      serviceAccount: admin
      hostNetwork: true
      hostPID: true
      containers:
      - name: driver-registrar
        image: registry.cn-hangzhou.aliyuncs.com/acs/csi-node-driver-registrar:v1.2.0
        imagePullPolicy: Always
        args:
        - "--v=5"
        - "--csi-address=/var/lib/kubelet/csi-plugins/cpfsplugin.csi.alibabacloud.com/csi.sock"
        - "--kubelet-registration-path=/var/lib/kubelet/csi-plugins/cpfsplugin.csi.alibabacloud.com/csi.sock"
        volumeMounts:
        - name: kubelet-dir
          mountPath: /var/lib/kubelet/
        - name: registration-dir
          mountPath: /registration
      - name: csi-cpfsplugin
        securityContext:
          privileged: true
          capabilities:
            add: ["SYS_ADMIN"]
          allowPrivilegeEscalation: true
        image: registry.cn-hangzhou.aliyuncs.com/acs/csi-cpfsplugin:v1.20.4-3220e46-aliyun
        imagePullPolicy: "Always"
        args:
        - "--endpoint=$(CSI_ENDPOINT)"
        - "--v=5"
        - "--driver=cpfsplugin.csi.alibabacloud.com"
        env:
        - name: CSI_ENDPOINT
          value: unix://var/lib/kubelet/csi-plugins/cpfsplugin.csi.alibabacloud.com/csi.sock
        volumeMounts:
        - name: kubelet-dir
          mountPath: /var/lib/kubelet/
          mountPropagation: "Bidirectional"
        - mountPath: /var/log/
          name: host-log
        - name: etc
          mountPath: /host/etc
      volumes:
      - name: kubelet-dir
        hostPath:
          path: /var/lib/kubelet/
          type: Directory
      - name: registration-dir
        hostPath:
          path: /var/lib/kubelet/plugins_registry
          type: DirectoryOrCreate
      - name: host-log
        hostPath:
          path: /var/log/
      - name: etc
        hostPath:
          path: /etc
  updateStrategy:
    type: RollingUpdate

执行以下命令检查应用运行状态。

kubectl get pod -nkube-system |grep cpfs

预期输出：

csi-cpfsplugin-8t585                               2/2     Running   0          4h43m
csi-cpfsplugin-9z5xj                               2/2     Running   0          4h43m
csi-cpfsplugin-bdm22                               2/2     Running   0          4h43m
csi-cpfsplugin-bjnlx                               2/2     Running   0          4h44m
csi-cpfsplugin-nv7vg                               2/2     Running   0          4h43m
csi-cpfsplugin-zc7z5                               2/2     Running   0          4h43m

使用CPFS1.0存储卷。

创建CPFS文件系统。具体操作，请参见创建文件系统。

创建PV和PVC。

使用以下模板，创建CPFS类型的PV和PVC。

apiVersion: v1
kind: PersistentVolume
metadata:
  name: cpfs-csi-pv
  labels:
    alicloud-pvname: cpfs-pv
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  csi:
    driver: cpfsplugin.csi.alibabacloud.com
    volumeHandle: cpfs-csi-pv
    volumeAttributes:
      server: "xxxxxx@tcp:xxxxxx@tcp"
      fileSystem: "xxxxxx"
      subPath: "/k8s"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: cpfs-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  selector:
    matchLabels:
      alicloud-pvname: cpfs-pv

创建应用。

使用以下模板引用上述PVC创建应用。

apiVersion: apps/v1
kind: Deployment
metadata:
  name: deployment-cpfs
  labels:
    app: nginx
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
        volumeMounts:
          - name: cpfs-pvc
            mountPath: "/data"
      volumes:
        - name: cpfs-pvc
          persistentVolumeClaim:
            claimName: cpfs-pvc