Kubernetes statefulset dengan volume persisten NFS

Jika kelas penyimpanan Anda tidak mendukung penyediaan volume dinamis, Anda harus membuat PV dan PVC terkait secara manual , menggunakan file yaml, maka volumeClaimTemplates akan mengizinkan untuk menautkan PVC yang ada dengan pod statefulset Anda.

Berikut adalah contoh kerja:https:/ /github.com/k8s-school/k8s-school/blob/master/examples/MONGODB-install.sh

Anda harus:

• jalankan secara lokal di https://kind.sigs.k8s.io/ , yang mendukung penyediaan volume dinamis, jadi di sini PVC dan PV akan dibuat secara otomatis
• mengekspor file yaml PV dan PVC
• gunakan file yaml ini sebagai template untuk membuat PV dan PVC untuk backend NFS Anda.

Inilah yang akan Anda dapatkan di Kind:

$ ./MONGODB-install.sh               
+ kubectl apply -f 13-12-mongo-configmap.yaml
configmap/mongo-init created
+ kubectl apply -f 13-11-mongo-service.yaml
service/mongo created
+ kubectl apply -f 13-14-mongo-pvc.yaml
statefulset.apps/mongo created
$ kubectl get pods
NAME      READY   STATUS    RESTARTS   AGE
mongo-0   2/2     Running   0          8m38s
mongo-1   2/2     Running   0          5m58s
mongo-2   2/2     Running   0          5m45s
$ kubectl get pvc
NAME               STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
database-mongo-0   Bound    pvc-05247511-096e-4af5-8944-17e0d8222512   1Gi        RWO            standard       8m42s
database-mongo-1   Bound    pvc-f53c35a4-6fc0-4b18-b5fc-d7646815c0dd   1Gi        RWO            standard       6m2s
database-mongo-2   Bound    pvc-2a711892-eeee-4481-94b7-6b46bf5b76a7   1Gi        RWO            standard       5m49s
$ kubectl get pv 
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                      STORAGECLASS   REASON   AGE
pvc-05247511-096e-4af5-8944-17e0d8222512   1Gi        RWO            Delete           Bound    default/database-mongo-0   standard                8m40s
pvc-2a711892-eeee-4481-94b7-6b46bf5b76a7   1Gi        RWO            Delete           Bound    default/database-mongo-2   standard                5m47s
pvc-f53c35a4-6fc0-4b18-b5fc-d7646815c0dd   1Gi        RWO            Delete           Bound    default/database-mongo-1   standard                6m1s

Dan tumpukan PVC (dihasilkan di sini oleh volumeClaimTemplate karena penyediaan volume dinamis jenis odf):

$ kubectl get pvc database-mongo-0 -o yaml
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: rancher.io/local-path
    volume.kubernetes.io/selected-node: kind-worker2
  creationTimestamp: "2020-10-16T15:05:20Z"
  finalizers:
  - kubernetes.io/pvc-protection
  labels:
    app: mongo
  managedFields:
    ...
  name: database-mongo-0
  namespace: default
  resourceVersion: "2259"
  selfLink: /api/v1/namespaces/default/persistentvolumeclaims/database-mongo-0
  uid: 05247511-096e-4af5-8944-17e0d8222512
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: standard
  volumeMode: Filesystem
  volumeName: pvc-05247511-096e-4af5-8944-17e0d8222512
status:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 1Gi
  phase: Bound

Dan PV terkait:

kubectl get pv pvc-05247511-096e-4af5-8944-17e0d8222512 -o yaml     
apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: rancher.io/local-path
  creationTimestamp: "2020-10-16T15:05:23Z"
  finalizers:
  - kubernetes.io/pv-protection
  managedFields:
    ...
  name: pvc-05247511-096e-4af5-8944-17e0d8222512
  resourceVersion: "2256"
  selfLink: /api/v1/persistentvolumes/pvc-05247511-096e-4af5-8944-17e0d8222512
  uid: 3d1e894e-0924-411a-8378-338e48ba4a28
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 1Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: database-mongo-0
    namespace: default
    resourceVersion: "2238"
    uid: 05247511-096e-4af5-8944-17e0d8222512
  hostPath:
    path: /var/local-path-provisioner/pvc-05247511-096e-4af5-8944-17e0d8222512_default_database-mongo-0
    type: DirectoryOrCreate
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - kind-worker2
  persistentVolumeReclaimPolicy: Delete
  storageClassName: standard
  volumeMode: Filesystem
status:
  phase: Bound