如何用pvc制作postgres头盔图

Question

我想为PostgreSQL创建一个使用PVC (持久化卷索赔)的头盔图表。

我试过用katacoda https://www.katacoda.com/courses/kubernetes/helm-package-manager用pvc创建Postgres头盔图表。

我该怎么做？

Answer 1

由于我们可以从PostgreSQL头盔图表文档中读取，它可以与下面的参数一起使用

+----------------------------+-----------------------------------------------------------------+---------------+
|         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                             | {}            |
+----------------------------+-----------------------------------------------------------------+---------------+

持久化 默认情况下，使用PostgreSQL状态集中的PVC模板保存数据。可以禁用持久性，将persistence.enabled参数设置为false。在Kubernetes集群中需要一个默认的StorageClass来动态地提供卷。如果已经存在要使用的持久卷，则在persistence.storageClass中指定另一个persistence.storageClass或设置persistence.existingClaim。

这意味着您只需要创建自己的持久体积，例如，它可以如下所示：

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

一旦部署并限制了它们，您就可以安装PostgreSQL图表了：

helm install my-release bitnami/postgresql --set persistence.existingClaim=task-pv-claim

Answer 2

我使用以下PVC、values.yaml和Chart.yaml进行部署

pvc.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: postgres-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 25Gi

values.yaml

postgresql:
  cpu: 1000m
  memory: 1Gi
  persistence:
    enabled: true
    existingClaim: postgres-pvc
  volumePermissions:
    enabled: true
  replication:
    enabled: false
  initdbScripts:
    psql.sql: |
      CREATE USER user WITH PASSWORD 'pass';
      ALTER USER user WITH SUPERUSER;

Chart.yaml

apiVersion: v2
name: pgname
description: A Short description

type: application

version: 0.1.3

appVersion: 1.16.2

dependencies:
  - name: postgresql
    version: 7.x.x
    repository: https://kubernetes-charts.storage.googleapis.com/
    condition: postgresql.enabled
    tags:
      - services
      - db
      - write

下面的目录结构中有上面的文件。

.
├── Chart.yaml
├── charts
│   └── postgresql-7.7.3.tgz
└── values.yaml

在.，我做helm dependency update和helm install release_name .来安装。在那个kubectl apply -f pvc.yaml之前

您需要在同一个名称空间中的备注

Answer 3

这个https://arctype.com/blog/deploy-postgres-kubernetes/解决了我的问题

# clean
helm list
helm delete postgresql-db
helm repo remove bitnami
kubectl get pvc
kubectl delete pvc data-postgresql-db
helm repo add bitnami https://charts.bitnami.com/bitnami
helm search repo postgresql

# Create PV & PVC
echo "---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: postgresql-pv
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"
" > pv.yaml
k apply -f pv.yaml

echo "---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgresql-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
" > pvc.yaml
k apply -f pvc.yaml

helm install postgresql-db bitnami/postgresql --set persistence.existingClaim=postgresql-pv-claim --set volumePermissions.enabled=true