kubernetes - 如何使用pvc创建postgres Helm 图

Question

我想用pvc创建postgres掌 Helm 聊天，请让我知道如何做，
在katacoda https://www.katacoda.com/courses/kubernetes/helm-package-manager中尝试
用pvc创建Postgres掌 Helm chart 。

Answer 1

正如我们可以从PostgreSQL Helm chart 文档中读取的那样，它可以与以下parameters一起使用:

+----------------------------+-----------------------------------------------------------------+---------------+
|         Parameter          |                           Description                           |    Default    |
+----------------------------+-----------------------------------------------------------------+---------------+
| persistence.enabled        | Enable data persistence                                         | true          |
| persistence.existingClaim  | Use a existing PVC which must be created manually before bound  | nil           |
| persistence.storageClass   | Specify the storageClass used to provision the volume           | nil           |
| persistence.mountPath      | Path to mount data volume at                                    | nil           |
| persistence.accessMode     | Access mode of data volume                                      | ReadWriteOnce |
| persistence.size           | Size of data volume                                             | 8Gi           |
| persistence.annotations    | Persistent Volume Claim annotations                             | {}            |
+----------------------------+-----------------------------------------------------------------+---------------+

Persistence

The data is persisted by default using PVC templates in the PostgreSQL statefulset. You can disable the persistence setting the persistence.enabled parameter to false. A default StorageClass is needed in the Kubernetes cluster to dynamically provision the volumes. Specify another StorageClass in the persistence.storageClass or set persistence.existingClaim if you have already existing persistent volumes to use.

这意味着您只需要创建自己的Persistent Volume即可，例如:

pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: task-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"

pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: task-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi

一旦部署和限制了这些，就可以安装PostgreSQL图表:
helm install my-release bitnami/postgresql --set persistence.existingClaim=task-pv-claim