(kubectl) Automatically Creating an EVS Disk

Scenario

CCE supports creating EVS volumes through PersistentVolumeClaims (PVCs).

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 pvc-evs-auto-example.yaml file, which is used to create a PVC.

   touch pvc-evs-auto-example.yaml

   vi pvc-evs-auto-example.yaml

   Example YAML file for clusters of v1.9, v1.11, and v1.13:

   apiVersion: v1
   kind: PersistentVolumeClaim
   metadata:
     name: pvc-evs-auto-example
     namespace: default
     annotations:
       volume.beta.kubernetes.io/storage-class: sas
     labels:
       failure-domain.beta.kubernetes.io/region: eu-de
       failure-domain.beta.kubernetes.io/zone: eu-de-01
   spec:
     accessModes:
     - ReadWriteOnce
     resources:
       requests:
         storage: 10Gi

   Table 1 Key parameters

   Parameter	Description
   volume.beta.kubernetes.io/storage-class	EVS disk type. The value is in lowercase. Supported values: Common I/O (SATA), High I/O (SAS), and Ultra-high I/O (SSD)High I/O (SAS) and Ultra-high I/O (SSD)
   failure-domain.beta.kubernetes.io/region	Region where the cluster is located. For details about the value of region, see Regions and Endpoints.
   failure-domain.beta.kubernetes.io/zone	AZ where the EVS volume is created. It must be the same as the AZ planned for the workload. For details about the value of zone, see Regions and Endpoints.
   storage	Storage capacity in the unit of Gi.
   accessModes	Read/write mode of the volume. You can set this parameter to ReadWriteMany (shared volume) and ReadWriteOnce (non-shared volume).

3. Run the following command to create a PVC.

   kubectl create -f pvc-evs-auto-example.yaml

   After the command is executed, an EVS disk is created in the partition where the cluster is located. Choose Storage > EVS to view the EVS disk. Alternatively, you can view the EVS disk based on the volume name on the EVS console.