apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus
  namespace: monitoring
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      # 모니터링 워커 노드 한 곳에만 올리고 싶으면 유지
      nodeName: rpi-worker-monitor
      containers:
        - name: prometheus
          image: prom/prometheus:latest
          args:
            - "--config.file=/etc/prometheus/prometheus.yml"
            - "--storage.tsdb.path=/prometheus"
            - "--web.enable-lifecycle"
          ports:
            - containerPort: 9090
          volumeMounts:
            - name: prometheus-config
              mountPath: /etc/prometheus
            - name: prometheus-data
              mountPath: /prometheus
      volumes:
        - name: prometheus-config
          configMap:
            name: prometheus-config
        - name: prometheus-data
          emptyDir: {}   # 테스트 용; 나중에 PVC로 바꿔도 됨

---
apiVersion: v1
kind: Service
metadata:
  name: prometheus
  namespace: monitoring
spec:
  selector:
    app: prometheus
  type: NodePort
  ports:
    - port: 9090          # ClusterIP 기준
      targetPort: 9090
      nodePort: 30100     # 외부에서 접근할 때 쓸 NodePort (30000~ 범위)