Master-Node Stack & README

k3s-monitoring/prometheus-deploy.yml

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+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)