apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-overview-dashboard
  namespace: observability
  labels:
    grafana_dashboard: "1"
data:
  cluster-overview.json: |
    {
      "annotations": { "list": [] },
      "editable": true,
      "fiscalYearStartMonth": 0,
      "graphTooltip": 1,
      "id": null,
      "links": [],
      "panels": [
        {
          "title": "CPU Usage by Node",
          "type": "timeseries",
          "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 },
          "targets": [
            {
              "expr": "100 - (avg by(instance) (rate(node_cpu_seconds_total{mode=\"idle\"}[5m])) * 100)",
              "legendFormat": "{{ instance }}"
            }
          ]
        },
        {
          "title": "Memory Usage by Node",
          "type": "timeseries",
          "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 },
          "targets": [
            {
              "expr": "(1 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes)) * 100",
              "legendFormat": "{{ instance }}"
            }
          ]
        },
        {
          "title": "Disk Usage by Node",
          "type": "timeseries",
          "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
          "targets": [
            {
              "expr": "(1 - (node_filesystem_avail_bytes{mountpoint=\"/\"} / node_filesystem_size_bytes{mountpoint=\"/\"})) * 100",
              "legendFormat": "{{ instance }}"
            }
          ]
        },
        {
          "title": "Pod Count by Namespace",
          "type": "bargauge",
          "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 },
          "targets": [
            {
              "expr": "count by(namespace) (kube_pod_info)",
              "legendFormat": "{{ namespace }}"
            }
          ]
        }
      ],
      "schemaVersion": 39,
      "tags": ["homelab", "cluster"],
      "templating": { "list": [] },
      "time": { "from": "now-6h", "to": "now" },
      "title": "Cluster Overview",
      "uid": "cluster-overview"
    }