jakman85andClaude Opus 4.8
a720c73fcd
Adds NodeCPUPressureHigh (CPU PSI 'some' > 15% for 15m) and NodeCPULoadHigh (load5/core > 1 for 15m) to platform-health.nodes, plus a 'Nodes — CPU / Memory Pressure' Grafana dashboard (PSI + load-per-core + utilization). These surface the bursty CPU contention that averaged CPU%/kubectl top hides — the signal behind 'spikes cause blips of delay'. Makes the 6->8 vCPU resize measurable. Co-Authored-By: Claude Opus 4.8 <[email protected]>
108 lines
4.8 KiB
YAML
108 lines
4.8 KiB
YAML
---
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# Grafana dashboard for node CPU/memory PRESSURE (docs/10 — platform-health capacity view). A plain
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# ConfigMap labeled `grafana_dashboard` that the kube-prometheus-stack Grafana sidecar auto-loads
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# (searchNamespace ALL). Surfaces PSI + load-per-core, which averaged CPU% (the default node
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# dashboards / kubectl top) hides — this is the view that reveals "spikes cause blips of delay".
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# Pairs with the NodeCPUPressureHigh / NodeCPULoadHigh alerts in alerts.yaml.
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: node-pressure-dashboard
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namespace: monitoring
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labels:
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grafana_dashboard: "1"
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data:
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node-pressure.json: |
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{
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"title": "Nodes — CPU / Memory Pressure",
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"uid": "node-pressure",
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"schemaVersion": 39,
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"timezone": "browser",
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"tags": ["nodes", "platform", "capacity"],
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"time": {"from": "now-6h", "to": "now"},
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"templating": {"list": []},
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"panels": [
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{
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"id": 1,
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"type": "stat",
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"title": "Max CPU pressure (PSI some, now)",
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"description": "Fraction of time some task was stalled waiting for CPU. <5% healthy, >15% contended.",
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"gridPos": {"h": 6, "w": 6, "x": 0, "y": 0},
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"fieldConfig": {"defaults": {"unit": "percent", "thresholds": {"steps": [
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{"color": "green", "value": null}, {"color": "yellow", "value": 5}, {"color": "red", "value": 15}
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]}}},
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"targets": [
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{"expr": "max(rate(node_pressure_cpu_waiting_seconds_total[5m])) * 100", "legendFormat": "max CPU PSI"}
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]
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},
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{
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"id": 2,
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"type": "stat",
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"title": "Max load per core (5m, now)",
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"description": "node_load5 / cores. >1 means the run queue exceeds the core count.",
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"gridPos": {"h": 6, "w": 6, "x": 6, "y": 0},
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"fieldConfig": {"defaults": {"unit": "short", "decimals": 2, "thresholds": {"steps": [
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{"color": "green", "value": null}, {"color": "yellow", "value": 0.8}, {"color": "red", "value": 1}
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]}}},
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"targets": [
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{"expr": "max(node_load5 / count without (cpu, mode) (node_cpu_seconds_total{mode=\"idle\"}))", "legendFormat": "max load/core"}
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]
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},
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{
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"id": 3,
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"type": "stat",
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"title": "Max CPU utilization (now)",
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"description": "Averaged busy%. Note: this looks calm even while PSI is high — that is the point.",
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"gridPos": {"h": 6, "w": 6, "x": 12, "y": 0},
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"fieldConfig": {"defaults": {"unit": "percent", "thresholds": {"steps": [
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{"color": "green", "value": null}, {"color": "yellow", "value": 70}, {"color": "red", "value": 90}
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]}}},
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"targets": [
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{"expr": "max(1 - avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m]))) * 100", "legendFormat": "max CPU util"}
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]
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},
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{
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"id": 4,
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"type": "timeseries",
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"title": "CPU pressure (PSI some) per node",
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"gridPos": {"h": 8, "w": 12, "x": 0, "y": 6},
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"fieldConfig": {"defaults": {"unit": "percent", "custom": {"drawStyle": "line", "fillOpacity": 10}}},
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"targets": [
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{"expr": "rate(node_pressure_cpu_waiting_seconds_total[5m]) * 100", "legendFormat": "{{instance}}"}
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]
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},
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{
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"id": 5,
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"type": "timeseries",
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"title": "Load per core per node",
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"gridPos": {"h": 8, "w": 12, "x": 12, "y": 6},
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"fieldConfig": {"defaults": {"unit": "short", "custom": {"drawStyle": "line", "fillOpacity": 10, "thresholdsStyle": {"mode": "line"}}, "thresholds": {"steps": [
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{"color": "green", "value": null}, {"color": "red", "value": 1}
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]}}},
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"targets": [
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{"expr": "node_load5 / count without (cpu, mode) (node_cpu_seconds_total{mode=\"idle\"})", "legendFormat": "{{instance}}"}
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]
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},
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{
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"id": 6,
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"type": "timeseries",
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"title": "CPU utilization per node",
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"gridPos": {"h": 8, "w": 12, "x": 0, "y": 14},
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"fieldConfig": {"defaults": {"unit": "percent", "max": 100, "custom": {"drawStyle": "line", "fillOpacity": 10}}},
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"targets": [
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{"expr": "(1 - avg by (instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m]))) * 100", "legendFormat": "{{instance}}"}
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]
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},
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{
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"id": 7,
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"type": "timeseries",
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"title": "Memory pressure (PSI some) per node",
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"gridPos": {"h": 8, "w": 12, "x": 12, "y": 14},
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"fieldConfig": {"defaults": {"unit": "percent", "custom": {"drawStyle": "line", "fillOpacity": 10}}},
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"targets": [
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{"expr": "rate(node_pressure_memory_waiting_seconds_total[5m]) * 100", "legendFormat": "{{instance}}"}
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]
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}
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]
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}
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