kubernetes - Helm删除StorageClass但保留持久卷声明

Question

我正在使用 Helm 部署StatefulSet，下面是yaml

---
kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
  name: {{ .Values.database.mongo.storageClassName }}
  labels:
    for: for-mongo-statefulset
provisioner: kubernetes.io/gce-pd
parameters:
  type: pd-ssd
reclaimPolicy: Retain
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: mongo
spec:
  serviceName: {{ .Values.database.mongo.serviceName }}
  replicas: {{ .Values.database.mongo.replicas }}
  template:
    metadata:
      labels:
        role: mongo
        environment: prod
    spec:
      serviceAccountName: {{ .Values.serviceAccount }}
      terminationGracePeriodSeconds: 10
      containers:
        - name: mongo
          image: mongo
          command:
            - mongod
            - "--bind_ip"
            - 0.0.0.0
            - "--replSet"
            - {{ .Values.database.mongo.replicaSet }}
            - "--smallfiles"
            - "--noprealloc"
          ports:
            - containerPort: {{ .Values.database.mongo.port }}
          volumeMounts:
            - name: {{ .Values.database.mongo.storageName }}
              mountPath: /data/db
        - name: mongo-sidecar
          image: cvallance/mongo-k8s-sidecar
          env:
            - name: MONGO_SIDECAR_POD_LABELS
              value: "role=mongo,environment=prod"
            - name: KUBERNETES_MONGO_SERVICE_NAME
              value: {{ .Values.database.mongo.serviceName }}
  volumeClaimTemplates:
  - metadata:
      name: {{ .Values.database.mongo.storageName }}
    spec:
      storageClassName: {{ .Values.database.mongo.storageClassName }}
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 100Gi

在 helm install . -n release-name上，它创建 StorageClass， PersistentVolume和 PersistentVolumeClaim。

如果删除发行版 helm delete release-name --purge，它将保留pv和pvc，这很好。但是，即使我在sc上指定了 StorageClass，它也会删除 reclaimPolicy: Retain。

这是预期的行为吗？

Helm 版本

Client: v2.10.0+g9ad53aa
Server: v2.10.0+g9ad53aa

Kubernetes版本

Client Version: v1.11.1
Server Version: v1.9.7-gke.5

更新

我假设 reclaimPolicy同时适用于StorageClass和PV / PVC，感谢@Pablo清除了我对 reclaimPolicy的理解

Reclaim Policy

Persistent Volumes that are dynamically created by a storage class will have the reclaim policy specified in the reclaimPolicy field of the class, which can be either Delete or Retain. If no reclaimPolicy is specified when a StorageClass object is created, it will default to Delete

是否有类似于 reclaimPolicy的内容，可以告诉 Helm 手/ kubernetes在执行 StorageClass时不要删除 helm delete release-name --purge？

Answer 1

StorageClass对象中列出的回收策略用于持久卷，而不是其自身的存储类。这意味着使用该存储类创建的pv和pvc将继承该存储类中设置的回收策略。

您可以在这里找到更多信息:https://kubernetes.io/docs/concepts/storage/storage-classes/