kubernetes-yaml/examples/postgres/postgres-16-single.yaml

---

# 创建 Namespace
apiVersion: v1
kind: Namespace
metadata:
  name: hty1024-db

---

# 创建 StorageClass
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: storage-local-postgres
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: storageClass
provisioner: kubernetes.io/no-provisioner
reclaimPolicy: Retain
volumeBindingMode: WaitForFirstConsumer

---

# 创建 PersistentVolume
apiVersion: v1
kind: PersistentVolume
metadata:
  name: hty1024-db-postgres-pv
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: persistentVolume
spec:
  capacity:
    storage: 20Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: storage-local-postgres
  local:
    path: /app/postgres/data
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
          - key: node.k8s.hty1024.com/type
            operator: In
            values:
              - app

---

# 创建 PersistentVolumeClaim
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: hty1024-db-postgres-pvc
  namespace: hty1024-db
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: persistentVolumeClaim
spec:
  resources:
    requests: 
      storage: 20Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  storageClassName: storage-local-postgres

---

# 创建 Secret（自定义 PostgreSQL 用户密码）
apiVersion: v1
kind: Secret
metadata:
  name: hty1024-db-postgres-secret
  namespace: hty1024-db
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: secret
type: Opaque
stringData:
  postgres.key: |
    123456
immutable: true

---

# 创建 Service
apiVersion: v1
kind: Service
metadata:
  name: hty1024-db-postgres-service
  namespace: hty1024-db
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: service
spec:
  type: ClusterIP
  ports:
    - port: 5432
      targetPort: 5432
  selector:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: pod

---

# 创建 StatefulSet
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: hty1024-db-postgres-statefulset
  namespace: hty1024-db
  labels:
    app.k8s.hty1024.com/env: prod
    app.k8s.hty1024.com/type: db
    app.k8s.hty1024.com/name: postgres
    app.k8s.hty1024.com/version: 16.4-alpine3.20
    app.k8s.hty1024.com/resources: statefulSet
spec:
  replicas: 1
  minReadySeconds: 30
  selector:
    matchLabels:
      app.k8s.hty1024.com/env: prod
      app.k8s.hty1024.com/type: db
      app.k8s.hty1024.com/name: postgres
      app.k8s.hty1024.com/version: 16.4-alpine3.20
      app.k8s.hty1024.com/resources: pod
  template:
    metadata:
      labels:
        app.k8s.hty1024.com/env: prod
        app.k8s.hty1024.com/type: db
        app.k8s.hty1024.com/name: postgres
        app.k8s.hty1024.com/version: 16.4-alpine3.20
        app.k8s.hty1024.com/resources: pod
    spec:
      terminationGracePeriodSeconds: 60
      volumes:
        - name: localtime
          hostPath:
            path: /etc/localtime
        - name: hty1024-db-postgres-data
          persistentVolumeClaim:
            claimName: hty1024-db-postgres-pvc
        - name: hty1024-db-postgres-pwd
          secret:
            secretName: hty1024-db-postgres-secret
      containers:
        - name: postgres
          image: postgres:16.4-alpine3.20
          ports:
            - name: tcp
              containerPort: 5432
          volumeMounts:
            - name: localtime
              mountPath: /etc/localtime
              readOnly: true
            - name: hty1024-db-postgres-data
              mountPath: /var/lib/postgres
            - name: hty1024-db-postgres-pwd
              mountPath: /tmp/secret-volume
              readOnly: true
          env:
            - name: POSTGRES_PASSWORD_FILE
              value: "/tmp/secret-volume/postgres.key"
      nodeSelector:
        node.k8s.hty1024.com/type: app