apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: k8s-node-rules
  namespace: monitoring
  labels:
    release: monitoring
spec:
  groups:
    - name: nodes.critical
      rules:
        - alert: NodeNotReady
          expr: kube_node_status_condition{condition="Ready",status="true"} == 0
          for: 15m
          labels:
            severity: critical
          annotations:
            summary: "Node NotReady"
            description: "Le node {{ $labels.node }} est NotReady depuis 15 minutes."

        - alert: NodeMemoryPressure
          expr: kube_node_status_condition{condition="MemoryPressure",status="true"} == 1
          for: 2m
          labels:
            severity: critical
          annotations:
            summary: "Node en MemoryPressure"
            description: "Le node {{ $labels.node }} est en MemoryPressure."

        - alert: NodeDiskPressure
          expr: kube_node_status_condition{condition="DiskPressure",status="true"} == 1
          for: 2m
          labels:
            severity: critical
          annotations:
            summary: "Node en DiskPressure"
            description: "Le node {{ $labels.node }} est en DiskPressure."

        - alert: NodeHighCPU
          expr: 100 - (avg by(node) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 85
          for: 10m
          labels:
            severity: warning
          annotations:
            summary: "CPU node élevé"
            description: "CPU du node {{ $labels.node }} > 85%."

        - alert: NodeHighMemory
          expr: (1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100 > 90
          for: 5m
          labels:
            severity: warning
          annotations:
            summary: "RAM node élevée"
            description: "RAM du node {{ $labels.node }} > 90%."