Updated on 2024-08-16 GMT+08:00

(kubectl) Creating a StatefulSet Mounted with an OBS Volume

Scenario

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

Notes and Constraints

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

Procedure

  1. Create an OBS volume by referring to (kubectl) Automatically Creating an OBS Volume and obtain the PVC name.
  2. Use kubectl to connect to the cluster. For details, see Connecting to a Cluster Using kubectl.
  3. Create a YAML file for creating the workload. Assume that the file name is obs-statefulset-example.yaml.

    touch obs-statefulset-example.yaml

    vi obs-statefulset-example.yaml

    Example YAML:

    apiVersion: apps/v1
    kind: StatefulSet
    metadata:
      name: obs-statefulset-example
      namespace: default
    spec:
      replicas: 1
      selector:
        matchLabels:
          app: obs-statefulset-example
      serviceName: qwqq
      template:
        metadata:
          annotations:
            metrics.alpha.kubernetes.io/custom-endpoints: '[{"api":"","path":"","port":"","names":""}]'
            pod.alpha.kubernetes.io/initialized: "true"
          creationTimestamp: null
          labels:
            app: obs-statefulset-example
        spec:
          affinity: {}
          containers:	
            image: nginx:latest
            imagePullPolicy: Always
            name: container-0
            volumeMounts:
            - mountPath: /tmp
              name: pvc-obs-example
          imagePullSecrets:
          - name: default-secret
          volumes:
            - name: pvc-obs-example
              persistentVolumeClaim:
                claimName: cce-obs-demo
    Table 1 Key parameters

    Parameter

    Description

    replicas

    Number of pods.

    name

    Name of the created workload.

    image

    Image used by the workload.

    mountPath

    Mount path in the container.

    serviceName

    Service corresponding to the workload. For details about how to create a Service, see Creating a StatefulSet.

    claimName

    Name of an existing PVC.

  4. Create the StatefulSet.

    kubectl create -f obs-statefulset-example.yaml