[20] Persistent Volume Claim을 사용하는 Pod 운영

❓Application with Persistent Volume Claim

• Create a new PersistentVolumeClaim
  • Name: app-volume
  • Storage Class: app-hostpath-sc
  • Capacity: 10Mi
• Create a new pod which mounts the PersistentVolumeClaim as a volume
  • Name: web-server-pod
  • Image: nginx
  • Mount Path: /usr/share/nginx/html
• Configure the new pod to have ReadWriteMany access on the volume.
• 작업 클러스터: k8s

Reference

docs에서 persistent volume 검색 후 → PersistentVolumeClaim부분

Persistent Volumes

docs에서 persistent volume 검색 후 → claims as volumes

Persistent Volumes

실습

[user@console ~]$ kubectl config use-context k8s

[user@console ~]$ vi app-volume-pvc.yaml

#docs에서 Persistent volume 검색 후 PersistentVolumeClaims 부분 긁어옴

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: app-volume
spec:
  accessModes:
    - ReadWriteMany
  volumeMode: Filesystem
  resources:
    requests:
      storage: 10Mi
  storageClassName: app-hostpath-sc

:wq

[user@console ~]$ kubectl apply -f app-volume-pvc.yaml

[user@console ~]$ kubectl get pvc 

[user@console ~]$ vi web-server-pod.yaml

#docs에서 persistent volume 검색 -> Claims as volumes 부분 긁어옴

apiVersion: v1
kind: Pod
metadata:
  name: web-server-pod
spec:
  containers:
    - name: nginx
      image: nginx
      volumeMounts:
      - mountPath: "/usr/share/nginx/html"
        name: mypd
  volumes:
    - name: mypd
      persistentVolumeClaim:
        claimName: app-volume
  
:wq

[user@console ~]$ kubectl apply -f web-server-pod.yaml

[user@console ~]$ kubectl get pods

[user@console ~]$ kubectl describe pod web-server-pod

기출문제 (61번)

kubectl config use-context k8s Create a new PersistentVolumeClaim:

Name: pv-volume

Class: app-hostpath-sc

Capacity: 10Mi Create a new Pod which mounts the PersistentVolumeClaim as a volume: Name: web-server-pod Image: nginx Mount path: /usr/share/nginx/html Configure the new Pod to have ReadWriteMany access on the volume. Finally, using kubectl edit or kubectl patch expand the PersistentVolumeClaim to a capacity of 70Mi and record that change.

• 답안

기출문제 (13번)

List all persistent volumes sorted by capacity, saving the full kubectl output to /opt/KUCC00102/volume_list.

Use kubectl 's own functionality for sorting the output, and do not manipulate it any further

• 답안

  kubectl get pv --sort-by=.spec.capacity.storage > /opt/KUCC00102/volume_list
  

기출문제 (16번)

Create a persistent volume with name app-data, of capacity 2Gi and access mode ReadWriteMany.

The type of volume is hostPath and its location is /srv/app-data.

• 답안

  vi pv.yaml
  
  apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: app-data
  spec:
    capacity:
      storage: 2Gi
    volumeMode: Filesystem
    accessModes:
      - ReadWriteMany
    persistentVolumeReclaimPolicy: Recycle
    storageClassName: slow
    hostPath:
      path: /srv/app-data
  
  :wq
  

  kubectl apply -f pv.yaml
  

기출문제 (55번)

Task Create a persistent volume with name app-data , of capacity 1Gi and access mode ReadOnlyMany. The type of volume is hostPath and its location is /srv/app-data .

• 답안

  vi pv.yaml
  
  apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: app-data
  spec:
    capacity:
      storage: 1Gi
    volumeMode: Filesystem
    accessModes:
      - ReadOnlyMany
    persistentVolumeReclaimPolicy: Recycle
    storageClassName: slow
    hostPath:
      path: /srv/app-data
  
  :wq
  

  kubectl apply -f pv.yaml