【CKA模拟题】一文教你用StorageClass轻松创建PV

题干

For this question, please set this context (In exam, diff cluster name)

kubectl config use-context kubernetes-admin@kubernetes

Your task involves setting up storage components in a Kubernetes cluster. Follow these steps:

Step 1: Create a Storage Class named blue-stc-cka with the following properties:

• Provisioner: kubernetes.io/no-provisioner
• Volume binding mode: WaitForFirstConsumer

Step 2: Create a Persistent Volume (PV) named blue-pv-cka with the following properties:

• Capacity: 100Mi
• Access mode: ReadWriteOnce
• Reclaim policy: Retain
• Storage class: blue-stc-cka
• Local path: /opt/blue-data-cka
• Node affinity: Set node affinity to create this PV on controlplane .

Step 3: Create a Persistent Volume Claim (PVC) named blue-pvc-cka with the following properties:

• Access mode: ReadWriteOnce
• Storage class: blue-stc-cka
• Storage request: 50Mi
• The volume should be bound to blue-pv-cka .

您的任务涉及在Kubernetes集群中设置存储组件。遵循以下步骤:

步骤1:创建一个名为blue-stc-cka的存储类，并具有以下属性:

• 提供程序:kubernetes.io/no-provisioner
• 卷绑定模式:WaitForFirstConsumer

步骤2:创建一个名为blue-pv-cka的持久卷(PV)，其属性如下:

• 容量:100Mi
• 访问方式:ReadWriteOnce
• 回收策略:Retain
• 存储类:blue-stc-cka
• 本地路径:/opt/blue-data-cka
• 节点亲和性:设置节点亲和性，在控制平面上创建该PV。

步骤3:创建一个名为blue-pvc-cka的持久容量声明(PVC)，并具有以下属性:

• 访问方式:ReadWriteOnce
• 存储类:blue-stc-cka
• 存储要求:50Mi
• volume设置为blue-pv-cka。

解题思路

1. 切换集群环境

kubectl config use-context kubernetes-admin@kubernetes

2. 创建一个名为blue-stc-cka的存储类。

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: blue-stc-cka
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

并提交blue-stc-cka.yaml资源清单

controlplane $ k apply  -f blue-stc-cka.yaml 
storageclass.storage.k8s.io/blue-stc-cka created

2. 创建一个名为blue-pv-cka的PV资源，资源清单如下：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: blue-pv-cka
spec:
  storageClassName: blue-stc-cka
  persistentVolumeReclaimPolicy: Retain
  capacity:
    storage: 100Mi
  accessModes:
    - ReadWriteOnce
  local:
    path: /opt/blue-data-cka
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - controlplane

提交资源清单，如下：

controlplane $ k apply  -f blue-pv-cka.yaml 
persistentvolume/blue-pv-cka created

3. 创建一个名为blue-pvc-cka的PVC资源，资源清单如下：

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: blue-pvc-cka
spec:
  storageClassName: blue-stc-cka
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Mi
  volumeName: blue-pv-cka

提交资源清单，如下：

controlplane $ k apply  -f blue-pvc-cka.yaml 
persistentvolumeclaim/blue-pvc-cka created

4. 验证结果

controlplane $ k get pvc
NAME           STATUS   VOLUME        CAPACITY   ACCESS MODES   STORAGECLASS   VOLUMEATTRIBUTESCLASS   AGE
blue-pvc-cka   Bound    blue-pv-cka   100Mi      RWO            blue-stc-cka   <unset>                 29s