(kubectl) Creating a Deployment Mounted with an SFS Volume

Scenario

After an SFS volume is created or imported to CCE, you can mount the volume to a workload.

Prerequisites

You have created a CCE cluster and installed the FlexVolume plug-in (storage-driver) in the cluster.

Notes and Constraints

The following configuration example applies to clusters of Kubernetes 1.13 or earlier.

Procedure

1. Use kubectl to connect to the cluster. For details, see Connecting to a Cluster Using kubectl.
2. Run the following commands to configure the sfs-deployment-example.yaml file, which is used to create a pod.

   touch sfs-deployment-example.yaml

   vi sfs-deployment-example.yaml

   Example of mounting an SFS volume to a Deployment (PVC-based, shared volume):

   apiVersion: apps/v1 
   kind: Deployment 
   metadata: 
     name: sfs-deployment-example                                # Workload name
     namespace: default 
   spec: 
     replicas: 1 
     selector: 
       matchLabels: 
         app: sfs-deployment-example 
     template: 
       metadata: 
         labels: 
           app: sfs-deployment-example 
       spec: 
         containers: 
         - image: nginx 
           name: container-0 
           volumeMounts: 
           - mountPath: /tmp                                # Mount path 
             name: pvc-sfs-example 
         imagePullSecrets:
           - name: default-secret
         restartPolicy: Always 
         volumes: 
         - name: pvc-sfs-example 
           persistentVolumeClaim: 
             claimName: pvc-sfs-auto-example                # PVC name

   Table 1 Key parameters

   Parent Parameter	Parameter	Description
   metadata	name	Name of the pod to be created.
   spec.template.spec.containers.volumeMounts	mountPath	Mount path in the container. In this example, the mount path is /tmp.
   spec.template.spec.volumes.persistentVolumeClaim	claimName	Name of an existing PVC.

   

   spec.template.spec.containers.volumeMounts.name and spec.template.spec.volumes.name must be consistent because they have a mapping relationship.

   Example of mounting an SFS volume to a StatefulSet (PVC template-based, dedicated volume):

   Example YAML:

   apiVersion: apps/v1
   kind: StatefulSet
   metadata:
     name: deploy-sfs-nfs-rw-in
     namespace: default
     labels:
       appgroup: ''
   spec:
     replicas: 2
     selector:
       matchLabels:
         app: deploy-sfs-nfs-rw-in
     template:
       metadata:
         labels:
           app: deploy-sfs-nfs-rw-in
       spec:
         containers:
           - name: container-0
             image: 'nginx:1.12-alpine-perl'
             volumeMounts:
               - name: bs-nfs-rw-mountoptionpvc
                 mountPath: /aaa
         imagePullSecrets:
           - name: default-secret
     volumeClaimTemplates:
       - metadata:
           name: bs-nfs-rw-mountoptionpvc
           annotations:
             volume.beta.kubernetes.io/storage-class: nfs-rw
             volume.beta.kubernetes.io/storage-provisioner: flexvolume-huawei.com/fuxinfs
         spec:
           accessModes:
             - ReadWriteMany
           resources:
             requests:
               storage: 1Gi
     serviceName: wwww

   Table 2 Key parameters

   Parent Parameter	Parameter	Description
   metadata	name	Name of the created workload.
   spec.template.spec.containers	image	Image of the workload.
   spec.template.spec.containers.volumeMount	mountPath	Mount path in the container. In this example, the mount path is /tmp.
   spec	serviceName	Service corresponding to the workload. For details about how to create a Service, see Creating a StatefulSet.

   

   spec.template.spec.containers.volumeMounts.name and spec.volumeClaimTemplates.metadata.name must be consistent because they have a mapping relationship.

3. Run the following command to create the pod:

   kubectl create -f sfs-deployment-example.yaml

   After the creation is complete, log in to the CCE console. In the navigation pane, choose Resource Management > Storage > SFS. Click the PVC name. On the PVC details page, you can view the binding relationship between SFS and PVC.