Kubernetes PostgreSQL

PV, PVC

• PV

  apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: postgresql-data-pv
  spec:
    capacity:
      storage: 10Gi
    volumeMode: Filesystem
    accessModes:
      - ReadWriteMany
    storageClassName: postgresql-data
    persistentVolumeReclaimPolicy: Retain
    hostPath:
      path: "/postgresql"

• PVC

  kind: PersistentVolumeClaim
  apiVersion: v1
  metadata:
    name: postgresql-data-pvc
  spec:
    accessModes:
      - ReadWriteMany
    volumeMode: Filesystem
    resources:
      requests:
        storage: 10Gi
    storageClassName: postgresql-data
  

Secret

apiVersion: v1
kind: Secret
metadata:
  name: postgresql-secret
stringData:
  POSTGRES_DB: [DB 이름]
  POSTGRES_USER: [User 이름]
  POSTGRES_PASSWORD: [User PW]
  PGDATA: /var/lib/postgresql/data/pgdata

Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: [Deployment 이름]
spec:
  replicas: 1
  selector:
    matchLabels:
      app: postgresql
      tier: postgresql
  template:
    metadata:
      labels:
        app: postgresql
        tier: postgresql
    spec:
      containers:
      - name: postgres
        image: postgres:13.4
        imagePullPolicy: "IfNotPresent"
        ports:
        - containerPort: 5432
        envFrom:
          - secretRef:
              name: postgresql-secret
        volumeMounts:
        - mountPath: /var/lib/postgresql/data
          name: postgresql-data-pv
      nodeSelector:
        [node]: [Selector]
      volumes:
      - name: postgresql-data-pv
        persistentVolumeClaim:
          claimName: postgresql-data-pvc

Service - nodeport

apiVersion: v1
kind: Service
metadata:
  name: postgresql
spec:
  type: NodePort
  selector:
    app: postgresql
  ports:
  - protocol: TCP
    port: 8080
    targetPort: 5432
    nodePort: 30021