{
  "title": "RootNode Academy — Infrastructure Overview",
  "uid": "rootnode-overview",
  "schemaVersion": 39,
  "version": 1,
  "timezone": "utc",
  "refresh": "30s",
  "time": { "from": "now-6h", "to": "now" },
  "panels": [
    {
      "id": 1, "title": "Platform VM CPU", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 },
      "targets": [{ "expr": "100 - (avg(rate(node_cpu_seconds_total{job=\"platform-node\",mode=\"idle\"}[5m])) * 100)", "legendFormat": "CPU %" }]
    },
    {
      "id": 2, "title": "Lab Host VM CPU", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 },
      "targets": [{ "expr": "100 - (avg(rate(node_cpu_seconds_total{job=\"lab-host-node\",mode=\"idle\"}[5m])) * 100)", "legendFormat": "CPU %" }]
    },
    {
      "id": 3, "title": "Platform VM Memory Available", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
      "targets": [{ "expr": "node_memory_MemAvailable_bytes{job=\"platform-node\"}", "legendFormat": "Available" }]
    },
    {
      "id": 4, "title": "Lab Host VM Memory Available", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 },
      "targets": [{ "expr": "node_memory_MemAvailable_bytes{job=\"lab-host-node\"}", "legendFormat": "Available" }]
    },
    {
      "id": 5, "title": "Disk Usage (root filesystem, both hosts)", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 16 },
      "targets": [{ "expr": "1 - (node_filesystem_avail_bytes{mountpoint=\"/\"} / node_filesystem_size_bytes{mountpoint=\"/\"})", "legendFormat": "{{host}}" }]
    },
    {
      "id": 6, "title": "Postgres — Up / Connections", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 16 },
      "targets": [
        { "expr": "pg_up", "legendFormat": "up" },
        { "expr": "pg_stat_database_numbackends{datname=\"rootnode_platform\"}", "legendFormat": "connections" }
      ]
    },
    {
      "id": 7, "title": "Running Docker Containers — Lab Host", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 24 },
      "targets": [{ "expr": "count(container_last_seen{name=~\"rootnode-lab-.*\"})", "legendFormat": "active labs (best-effort via cadvisor label match)" }]
    },
    {
      "id": 8, "title": "Uptime Probes (Gateway / Platform API / Provisioner)", "type": "timeseries",
      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 24 },
      "targets": [{ "expr": "probe_success", "legendFormat": "{{job}}" }]
    }
  ]
}