Dong, Qiu Jian b05d81fd8b CCE UMN for 1.23 reuploaded -20221103

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Dong, Qiu Jian <qiujiandong1@huawei.com>
Co-committed-by: Dong, Qiu Jian <qiujiandong1@huawei.com>

2022-11-10 19:50:29 +00:00

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(kubectl) Creating a StatefulSet Mounted with an SFS Volume

Scenario

CCE allows you to use an existing SFS volume to create a StatefulSet through a PersistentVolumeClaim (PVC).

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

Create an SFS volume by referring to Creating an SFS Volume and record the volume name.
Use kubectl to connect to the cluster. For details, see Connecting to a Cluster Using kubectl.

Create a YAML file for creating the workload. Assume that the file name is sfs-statefulset-example.yaml.

touch sfs-statefulset-example.yaml

vi sfs-statefulset-example.yaml

Example YAML:

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: sfs-statefulset-example
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: sfs-statefulset-example
  serviceName: qwqq
  template:
    metadata:
      annotations:
        metrics.alpha.kubernetes.io/custom-endpoints: '[{"api":"","path":"","port":"","names":""}]'
        pod.alpha.kubernetes.io/initialized: "true"
      labels:
        app: sfs-statefulset-example
    spec:
      affinity: {}
      containers:
      - image: nginx:latest
        name: container-0
        volumeMounts:
        - mountPath: /tmp
          name: pvc-sfs-example
      imagePullSecrets:
      - name: default-secret
      volumes:
        - name: pvc-sfs-example
          persistentVolumeClaim:
            claimName: cce-sfs-demo

**Table 1** Key parameters
Parent Parameter	Parameter	Description
spec	replicas	Number of pods.
metadata	name	Name of the created workload.
spec.template.spec.containers	image	Image used by the workload.
spec.template.spec.containers.volumeMounts	mountPath	Mount path in the container.
spec	serviceName	Service corresponding to the workload. For details about how to create a Service, see Creating a StatefulSet.
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.

Create the StatefulSet.
kubectl create -f sfs-statefulset-example .yaml

Parent topic: Using SFS File Systems as Storage Volumes

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