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展開Volume

貢獻者

Astra Trident可讓Kubernetes使用者在建立磁碟區之後擴充磁碟區。尋找擴充iSCSI和NFS磁碟區所需組態的相關資訊。

展開iSCSI Volume

您可以使用「SCSI資源配置程式」來擴充iSCSI持續磁碟區(PV)。

附註 iSCSI磁碟區擴充支援「ontap-san」、「ONTAP-san經濟」、「Poolidfire-san」等驅動程式、需要Kubernetes 1.16及更新版本。

擴充iSCSI PV包括下列步驟:

  • 編輯StorageClass定義、將「owvolVolume Expansion」欄位設定為「true」。

  • 編輯PVC定義並更新「s.pec.estices.storage」、以反映新的所需大小、此大小必須大於原始大小。

  • 必須將PV附加至Pod、才能調整其大小。調整iSCSI PV的大小有兩種情況:

    • 如果PV附加至Pod、Astra Trident會在儲存後端擴充磁碟區、重新掃描裝置、並重新調整檔案系統的大小。

    • 嘗試調整未附加PV的大小時、Astra Trident會在儲存後端上擴充磁碟區。在將永久虛擬磁碟綁定至Pod之後、Trident會重新掃描裝置並重新調整檔案系統的大小。然後、Kubernetes會在擴充作業成功完成後、更新PVc大小。

以下範例顯示擴充iSCSI PV的運作方式。

步驟1:設定StorageClass以支援Volume擴充

$ cat storageclass-ontapsan.yaml
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ontap-san
provisioner: csi.trident.netapp.io
parameters:
  backendType: "ontap-san"
allowVolumeExpansion: True

對於已存在的StorageClass、請編輯此類以包含「owalumVolume Expansion」參數。

步驟2:使用您建立的StorageClass建立一個永久虛擬儲存設備

$ cat pvc-ontapsan.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: san-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: ontap-san

Astra Trident會建立持續磁碟區(PV)、並將其與此持續磁碟區宣告(PVc)建立關聯。

$ kubectl get pvc
NAME      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
san-pvc   Bound    pvc-8a814d62-bd58-4253-b0d1-82f2885db671   1Gi        RWO            ontap-san      8s

$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM             STORAGECLASS   REASON   AGE
pvc-8a814d62-bd58-4253-b0d1-82f2885db671   1Gi        RWO            Delete           Bound    default/san-pvc   ontap-san               10s

步驟3:定義一個連接至PVc的Pod

在此範例中、會建立使用「shan -PVc」的Pod。

$  kubectl get pod
NAME         READY   STATUS    RESTARTS   AGE
centos-pod   1/1     Running   0          65s

$  kubectl describe pvc san-pvc
Name:          san-pvc
Namespace:     default
StorageClass:  ontap-san
Status:        Bound
Volume:        pvc-8a814d62-bd58-4253-b0d1-82f2885db671
Labels:        <none>
Annotations:   pv.kubernetes.io/bind-completed: yes
               pv.kubernetes.io/bound-by-controller: yes
               volume.beta.kubernetes.io/storage-provisioner: csi.trident.netapp.io
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:      1Gi
Access Modes:  RWO
VolumeMode:    Filesystem
Mounted By:    centos-pod

步驟4:展開PV

若要調整從1Gi建立至2Gi的PV大小、請編輯PVc定義、並將「sec.resumes.requests.storage」更新為2Gi。

$ kubectl edit pvc san-pvc
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    pv.kubernetes.io/bind-completed: "yes"
    pv.kubernetes.io/bound-by-controller: "yes"
    volume.beta.kubernetes.io/storage-provisioner: csi.trident.netapp.io
  creationTimestamp: "2019-10-10T17:32:29Z"
  finalizers:
  - kubernetes.io/pvc-protection
  name: san-pvc
  namespace: default
  resourceVersion: "16609"
  selfLink: /api/v1/namespaces/default/persistentvolumeclaims/san-pvc
  uid: 8a814d62-bd58-4253-b0d1-82f2885db671
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 2Gi
 ...

步驟5:驗證擴充

您可以檢查PVc、PV和Astra Trident Volume的大小、以正確驗證擴充作業:

$ kubectl get pvc san-pvc
NAME      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
san-pvc   Bound    pvc-8a814d62-bd58-4253-b0d1-82f2885db671   2Gi        RWO            ontap-san      11m
$ kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM             STORAGECLASS   REASON   AGE
pvc-8a814d62-bd58-4253-b0d1-82f2885db671   2Gi        RWO            Delete           Bound    default/san-pvc   ontap-san               12m
$ tridentctl get volumes -n trident
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+
|                   NAME                   |  SIZE   | STORAGE CLASS | PROTOCOL |             BACKEND UUID             | STATE  | MANAGED |
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+
| pvc-8a814d62-bd58-4253-b0d1-82f2885db671 | 2.0 GiB | ontap-san     | block    | a9b7bfff-0505-4e31-b6c5-59f492e02d33 | online | true    |
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+

展開NFS Volume

Astra Trident支援在「ONTAP-NAS」、「ONTAP-NAs-P節約」、「ONTAP-NAs-flexgroup」、「GCP-CVS」和「azure-NetApp-fils」後端配置NFS PV的Volume擴充。

步驟1:設定StorageClass以支援Volume擴充

若要調整NFS PV的大小、管理員必須先將「ow淺Volume Expansion」欄位設定為「true」、以設定儲存類別以允許磁碟區擴充:

$ cat storageclass-ontapnas.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: ontapnas
provisioner: csi.trident.netapp.io
parameters:
  backendType: ontap-nas
allowVolumeExpansion: true

如果您已經建立了沒有此選項的儲存類別、只要使用「kubecl Edit storageclass'」來編輯現有的儲存類別、即可進行磁碟區擴充。

步驟2:使用您建立的StorageClass建立一個永久虛擬儲存設備

$ cat pvc-ontapnas.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: ontapnas20mb
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 20Mi
  storageClassName: ontapnas

Astra Trident應為此PVC建立20MiB NFS PV:

$ kubectl get pvc
NAME           STATUS   VOLUME                                     CAPACITY     ACCESS MODES   STORAGECLASS    AGE
ontapnas20mb   Bound    pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7   20Mi         RWO            ontapnas        9s

$ kubectl get pv pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS    REASON   AGE
pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7   20Mi       RWO            Delete           Bound    default/ontapnas20mb   ontapnas                 2m42s

步驟3:展開PV

若要將新建立的20MiB PV調整至1GiB、請編輯PVC並將「siec.resumes.requests.storage」設為1GB:

$ kubectl edit pvc ontapnas20mb
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    pv.kubernetes.io/bind-completed: "yes"
    pv.kubernetes.io/bound-by-controller: "yes"
    volume.beta.kubernetes.io/storage-provisioner: csi.trident.netapp.io
  creationTimestamp: 2018-08-21T18:26:44Z
  finalizers:
  - kubernetes.io/pvc-protection
  name: ontapnas20mb
  namespace: default
  resourceVersion: "1958015"
  selfLink: /api/v1/namespaces/default/persistentvolumeclaims/ontapnas20mb
  uid: c1bd7fa5-a56f-11e8-b8d7-fa163e59eaab
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
...

步驟4:驗證擴充

您可以檢查PVc、PV和Astra Trident Volume的大小、以正確驗證調整大小:

$ kubectl get pvc ontapnas20mb
NAME           STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS    AGE
ontapnas20mb   Bound    pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7   1Gi        RWO            ontapnas        4m44s

$ kubectl get pv pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                  STORAGECLASS    REASON   AGE
pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7   1Gi        RWO            Delete           Bound    default/ontapnas20mb   ontapnas                 5m35s

$ tridentctl get volume pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7 -n trident
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+
|                   NAME                   |  SIZE   | STORAGE CLASS | PROTOCOL |             BACKEND UUID             | STATE  | MANAGED |
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+
| pvc-08f3d561-b199-11e9-8d9f-5254004dfdb7 | 1.0 GiB | ontapnas      | file     | c5a6f6a4-b052-423b-80d4-8fb491a14a22 | online | true    |
+------------------------------------------+---------+---------------+----------+--------------------------------------+--------+---------+