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Methods for Defining ReadOnlyMany Storage

Overview​

The prerequisite for implementing ReadOnlyMany (multi-machine read-only) is that the backend storage is shared storage. In Tencent Cloud, there are two types of shared storage: COS (Cloud Object Storage) and CFS (Cloud File Storage). This article describes how to define these two shared storage types as PVs for use in Tencent Cloud Container Service environments.

COS​

  1. Specify accessModes as ReadOnlyMany.
  2. Specify -oro in csi.volumeAttributes.additional_args.

YAML example:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: registry
spec:
  accessModes:
  - ReadOnlyMany
  capacity:
    storage: 1Gi
  csi:
    readOnly: true
    driver: com.tencent.cloud.csi.cosfs
    volumeHandle: registry
    volumeAttributes:
      additional_args: "-oro"
      url: "http://cos.ap-chengdu.myqcloud.com"
      bucket: "roc-**********"
      path: /test
    nodePublishSecretRef:
      name: cos-secret
      namespace: kube-system

CFS​

  1. Specify accessModes as ReadOnlyMany.
  2. Specify ro in mountOptions.

YAML example:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: test
spec:
  accessModes:
  - ReadOnlyMany
  capacity:
    storage: 10Gi
  storageClassName: cfs
  persistentVolumeReclaimPolicy: Retain
  volumeMode: Filesystem
  mountOptions:
  - ro
  csi:
    driver: com.tencent.cloud.csi.cfs
    volumeAttributes:
      host: 10.10.99.99
      path: /test
    volumeHandle: cfs-********