Longhorn部署完毕后会自动创建出StorageClass，我们只需要创建pvc即可，需要注意longhorn的pvc默认删除策略为delete，如果需要保留则需要手动将其StorageClass内的策略改为Retain。

创建pvc

1.编写pvc资源清单

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root@k8s-master01:~/yaml/chapter05# vim pvc-dyn-longhon-demo.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-dyn-longhorn-demo
  namespace: default
spec:
  accessModes: ["ReadWriteOnce"]
  volumeMode: Filesystem
  resources:
    requests:
      storage: 2Gi
    limits:
      storage: 10Gi
  storageClassName: longhorn

2.应用清单

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root@k8s-master01:~/yaml/chapter05# kubectl  apply -f pvc-dyn-longhon-demo.yaml
persistentvolumeclaim/pvc-dyn-longhorn-demo created

root@k8s-master01:~/yaml/chapter05# kubectl  get pvc
NAME                    STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
pvc-dyn-longhorn-demo   Bound    pvc-5db5bc10-5277-4452-bf3b-d821fa31cde1   2Gi        RWO            longhorn       2m10s

Pod中使用PVC

1.创建资源清单

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root@k8s-master01:~/yaml/chapter05# vim volume-pvc-longhorn-demo.yaml
apiVersion: v1
kind: Pod
metadata:
  name: volumes-pvc-longhorn-demo
  namespace: default
spec:
  containers:
  - name: redis
    image: redis:alpine
    imagePullPolicy: IfNotPresent
    ports:
    - containerPort: 6379
      name: redisport
    volumeMounts:
    - name: redis-data-vol
      mountPath: /data
  volumes:
  - name: redis-data-vol
    persistentVolumeClaim:
      claimName: pvc-dyn-longhorn-demo

2.应用配置清单

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root@k8s-master01:~/yaml/chapter05# kubectl apply -f volumes-pvc-longhorn-demo.yaml
pod/volumes-pvc-longhorn-demo created

root@k8s-master01:~/yaml/chapter05# kubectl get pods
NAME                        READY   STATUS    RESTARTS   AGE
volumes-pvc-longhorn-demo   1/1     Running   0          3m34s

3.查看挂载的卷

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root@k8s-master01:~/yaml/chapter05# kubectl exec volumes-pvc-longhorn-demo -- mount | grep data
/dev/longhorn/pvc-5db5bc10-5277-4452-bf3b-d821fa31cde1 on /data type ext4 (rw,relatime)