【CKA模拟题】综合演练演示Pod如何引用PVC的资源

Useful Resources: Persistent Volumes & Claim , Pod to Use a PV

题干

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

kubectl config use-context kubernetes-admin@kubernetes

You are responsible for provisioning storage for a Kubernetes cluster. Your task is to create a PersistentVolume (PV), a PersistentVolumeClaim (PVC), and deploy a pod that uses the PVC for shared storage.

Here are the specific requirements:

• Create a PersistentVolume (PV) named my-pv-cka with the following properties:

• Storage capacity: 100Mi
• Access mode: ReadWriteOnce
• Host path: /mnt/data
• Storage class: standard

• Create a PersistentVolumeClaim (PVC) named my-pvc-cka to claim storage from the my-pv-cka PV, with the following properties:

• Storage class: standard
• request storage: 100Mi (less than)

• Deploy a pod named my-pod-cka using the nginx container image.
• Mount the PVC, my-pvc-cka , to the pod at the path /var/www/html . Ensure that the PV, PVC, and pod are successfully created, and the pod is in a Running state.

Note: Binding and Pod might take time to come up, please have patience

您负责为Kubernetes集群提供存储。您的任务是创建一个PersistentVolume (PV)和一个persistentvolumecclaim (PVC)，并部署一个使用PVC进行共享存储的pod。

具体要求如下:

• 创建一个名为my-pv-cka的持久化卷(PV)，其属性如下:

• 存储容量:100Mi
• 访问方式:ReadWriteOnce
• 主机路径:“/mnt/data”
• 存储等级:standard

创建一个名为my-pv-cka的persistentvolumecclaim (PVC)，从my-pv-cka PV中声明存储空间，具有以下属性:

• 存储等级:standard
• 请求存储:100Mi(小于)
• 使用nginx容器镜像部署一个名为my-pod-cka的pod。
• 将PVC my-pvc-cka挂载到/var/www/html路径下的pod上。确保已成功创建PV、PVC和pod，且pod状态为“Running”。

注意:绑定和Pod可能需要一些时间，请耐心等待

解题思路

1. 切换集群环境

kubectl config use-context kubernetes-admin@kubernetes

2. 按照题目的要求编写PV资源清单

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-pv-cka
spec:
  storageClassName: standard
  capacity:
    storage: 100Mi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"

3. 提交PV资源清单

controlplane $ k apply  -f pv.yaml 
persistentvolume/my-pv-cka created
controlplane $ k get pv
NAME        CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   VOLUMEATTRIBUTESCLASS   REASON   AGE
my-pv-cka   100Mi      RWO            Retain           Available           standard       <unset>                          7s

4. 按照题目的要求创建PVC资源，内容如下：

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-pvc-cka
spec:
  volumeName: my-pv-cka
  storageClassName: manual
  accessModes:
    - ReadWriteOnce  
  resources:
    requests:
      storage: 100Mi

5. 提交PVC资源清单

controlplane $ k apply -f pvc.yaml 
persistentvolumeclaim/my-pvc-cka created
controlplane $ k get pvc
NAME         STATUS   VOLUME      CAPACITY   ACCESS MODES   STORAGECLASS   VOLUMEATTRIBUTESCLASS   AGE
my-pvc-cka   Bound    my-pv-cka   100Mi      RWO            standard       <unset>                 3s

6. 按照题目的要求编写Pod资源清单，内容如下：

apiVersion: v1
kind: Pod
metadata:
  name: my-pod-cka
spec:
  containers:
    - name: nginx-container
      image: nginx
      volumeMounts:
        - name: my-pvc-cka-volume
          mountPath: /var/www/html
  volumes:
    - name: my-pvc-cka-volume
      persistentVolumeClaim:
        claimName: my-pvc-cka

7. 提交Pod资源清单

controlplane $ k apply  -f pod.yaml 
pod/my-pod-cka created