Grafana dashboard: Disk Utilization
Description: Disk_space_utilization
Mix by node_exporter and windows_exporter.

Only requires the default job_name: node or windows , add as many targets as you need in `prometheus.yml`.
```yaml
  - job_name: node
    static_configs:
      - targets: ['localhost:9100']
  - job_name: windows
    static_configs:
      - targets: ['localhost:9182']
```

{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS",
      "label": "Prometheus",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__elements": {},
  "__requires": [
    {
      "type": "panel",
      "id": "bargauge",
      "name": "Bar gauge",
      "version": ""
    },
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "9.4.3"
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "datasource",
          "uid": "grafana"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "target": {
          "limit": 100,
          "matchAny": false,
          "tags": [],
          "type": "dashboard"
        },
        "type": "dashboard"
      }
    ]
  },
  "description": "Disk_space_utilization\nMix by node_exporter and windows_exporter.",
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": null,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "continuous-GrYlRd"
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 24,
        "w": 18,
        "x": 0,
        "y": 0
      },
      "id": 2,
      "options": {
        "displayMode": "lcd",
        "minVizHeight": 10,
        "minVizWidth": 0,
        "orientation": "horizontal",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showUnfilled": true,
        "text": {}
      },
      "pluginVersion": "9.4.3",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": true,
          "expr": "topk(40, (100 - (windows_logical_disk_free_bytes{volume!~\"HarddiskVolume.*\",} / windows_logical_disk_size_bytes)*100  or 100 - ((node_filesystem_avail_bytes{device!~'rootfs',mountpoint!~'/mnt|/media'} * 100) / node_filesystem_size_bytes{device!~'rootfs'}) ) )",
          "format": "time_series",
          "instant": true,
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "{{desc}} {{instance}} {{volume}} {{mountpoint}} Space utilization",
          "refId": "A"
        }
      ],
      "title": "磁盘空间利用率",
      "transformations": [
        {
          "id": "filterFieldsByName",
          "options": {
            "include": {}
          }
        }
      ],
      "type": "bargauge"
    }
  ],
  "refresh": "1m",
  "revision": 1,
  "schemaVersion": 38,
  "style": "dark",
  "tags": [
    "prometheus"
  ],
  "templating": {
    "list": []
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "Disk Utilization",
  "uid": "_Yj7Asqnz",
  "version": 5,
  "weekStart": "",
  "gnetId": 18328
}