example-postgres.yaml

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: example-postgres-configmap
  labels:
    app: example-postgres
data:
  POSTGRES_DB: example
  POSTGRES_USER: example
  POSTGRES_PASSWORD: example
---
apiVersion: v1
kind: Service
metadata:
  name: example-postgres
  labels:
    app: example-postgres
spec:
  ports:
    - port: 5432
      protocol: TCP
  selector:
    app: example-postgres
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: example-postgres
  labels:
    app: example-postgres
spec:
  serviceName: example-postgres
  replicas: 1
  selector:
    matchLabels:
      app: example-postgres
  template:
    metadata:
      labels:
        app: example-postgres
    spec:
      containers:
        - name: postgres
          image: postgres:13.1-alpine
          ports:
            - containerPort: 5432
          envFrom:
            - configMapRef:
                name: example-postgres-configmap