home-network-k3s-impl/platform/monitoring/node-pressure-dashboard.yaml

---
# Grafana dashboard for node CPU/memory PRESSURE (docs/10 — platform-health capacity view). A plain
# ConfigMap labeled `grafana_dashboard` that the kube-prometheus-stack Grafana sidecar auto-loads
# (searchNamespace ALL). Surfaces PSI + load-per-core, which averaged CPU% (the default node
# dashboards / kubectl top) hides — this is the view that reveals "spikes cause blips of delay".
# Pairs with the NodeCPUPressureHigh / NodeCPULoadHigh alerts in alerts.yaml.
apiVersion: v1
kind: ConfigMap
metadata:
  name: node-pressure-dashboard
  namespace: monitoring
  labels:
    grafana_dashboard: "1"
data:
  node-pressure.json: |
    {
      "title": "Nodes — CPU / Memory Pressure",
      "uid": "node-pressure",
      "schemaVersion": 39,
      "timezone": "browser",
      "tags": ["nodes", "platform", "capacity"],
      "time": {"from": "now-6h", "to": "now"},
      "templating": {"list": []},
      "panels": [
        {
          "id": 1,
          "type": "stat",
          "title": "Max CPU pressure (PSI some, now)",
          "description": "Fraction of time some task was stalled waiting for CPU. <5% healthy, >15% contended.",
          "gridPos": {"h": 6, "w": 6, "x": 0, "y": 0},
          "fieldConfig": {"defaults": {"unit": "percent", "thresholds": {"steps": [
            {"color": "green", "value": null}, {"color": "yellow", "value": 5}, {"color": "red", "value": 15}
          ]}}},
          "targets": [
            {"expr": "max(rate(node_pressure_cpu_waiting_seconds_total[5m])) * 100", "legendFormat": "max CPU PSI"}
          ]
        },
        {
          "id": 2,
          "type": "stat",
          "title": "Max load per core (5m, now)",
          "description": "node_load5 / cores. >1 means the run queue exceeds the core count.",
          "gridPos": {"h": 6, "w": 6, "x": 6, "y": 0},
          "fieldConfig": {"defaults": {"unit": "short", "decimals": 2, "thresholds": {"steps": [
            {"color": "green", "value": null}, {"color": "yellow", "value": 0.8}, {"color": "red", "value": 1}
          ]}}},
          "targets": [
            {"expr": "max(node_load5 / count without (cpu, mode) (node_cpu_seconds_total{mode=\"idle\"}))", "legendFormat": "max load/core"}
          ]
        },
        {
          "id": 3,
          "type": "stat",
          "title": "Max CPU utilization (now)",
          "description": "Averaged busy%. Note: this looks calm even while PSI is high — that is the point.",
          "gridPos": {"h": 6, "w": 6, "x": 12, "y": 0},
          "fieldConfig": {"defaults": {"unit": "percent", "thresholds": {"steps": [
            {"color": "green", "value": null}, {"color": "yellow", "value": 70}, {"color": "red", "value": 90}
          ]}}},
          "targets": [
            {"expr": "max(1 - avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m]))) * 100", "legendFormat": "max CPU util"}
          ]
        },
        {
          "id": 4,
          "type": "timeseries",
          "title": "CPU pressure (PSI some) per node",
          "gridPos": {"h": 8, "w": 12, "x": 0, "y": 6},
          "fieldConfig": {"defaults": {"unit": "percent", "custom": {"drawStyle": "line", "fillOpacity": 10}}},
          "targets": [
            {"expr": "rate(node_pressure_cpu_waiting_seconds_total[5m]) * 100", "legendFormat": "{{instance}}"}
          ]
        },
        {
          "id": 5,
          "type": "timeseries",
          "title": "Load per core per node",
          "gridPos": {"h": 8, "w": 12, "x": 12, "y": 6},
          "fieldConfig": {"defaults": {"unit": "short", "custom": {"drawStyle": "line", "fillOpacity": 10, "thresholdsStyle": {"mode": "line"}}, "thresholds": {"steps": [
            {"color": "green", "value": null}, {"color": "red", "value": 1}
          ]}}},
          "targets": [
            {"expr": "node_load5 / count without (cpu, mode) (node_cpu_seconds_total{mode=\"idle\"})", "legendFormat": "{{instance}}"}
          ]
        },
        {
          "id": 6,
          "type": "timeseries",
          "title": "CPU utilization per node",
          "gridPos": {"h": 8, "w": 12, "x": 0, "y": 14},
          "fieldConfig": {"defaults": {"unit": "percent", "max": 100, "custom": {"drawStyle": "line", "fillOpacity": 10}}},
          "targets": [
            {"expr": "(1 - avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m]))) * 100", "legendFormat": "{{instance}}"}
          ]
        },
        {
          "id": 7,
          "type": "timeseries",
          "title": "Memory pressure (PSI some) per node",
          "gridPos": {"h": 8, "w": 12, "x": 12, "y": 14},
          "fieldConfig": {"defaults": {"unit": "percent", "custom": {"drawStyle": "line", "fillOpacity": 10}}},
          "targets": [
            {"expr": "rate(node_pressure_memory_waiting_seconds_total[5m]) * 100", "legendFormat": "{{instance}}"}
          ]
        }
      ]
    }