headscale/docs/examples/kubernetes/postgres/postgres-statefulset.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgres
spec:
  serviceName: postgres
  replicas: 1
  selector:
    matchLabels:
      app: postgres
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: "postgres:13"
          imagePullPolicy: IfNotPresent
          env:
            - name: POSTGRES_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: postgresql
                  key: password
            - name: POSTGRES_USER
              value: headscale
          ports:
            - name: postgres
              protocol: TCP
              containerPort: 5432
          livenessProbe:
            tcpSocket:
              port: 5432
            initialDelaySeconds: 30
            timeoutSeconds: 5
            periodSeconds: 15
          volumeMounts:
            - name: pgdata
              mountPath: /var/lib/postgresql/data
  volumeClaimTemplates:
    - metadata:
        name: pgdata
      spec:
        storageClassName: local-path
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 1Gi