nixos-servers/services/grafana/dashboards/node-exporter.json

{
  "uid": "node-exporter-homelab",
  "title": "Node Exporter - Homelab",
  "tags": ["node-exporter", "prometheus", "homelab"],
  "timezone": "browser",
  "schemaVersion": 39,
  "version": 1,
  "refresh": "30s",
  "templating": {
    "list": [
      {
        "name": "instance",
        "type": "query",
        "datasource": {"type": "prometheus", "uid": "prometheus"},
        "query": "label_values(node_uname_info, instance)",
        "refresh": 2,
        "includeAll": false,
        "multi": false,
        "current": {}
      }
    ]
  },
  "panels": [
    {
      "id": 1,
      "title": "CPU Usage",
      "type": "timeseries",
      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 0},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "100 - (avg by(instance) (rate(node_cpu_seconds_total{mode=\"idle\", instance=~\"$instance\"}[5m])) * 100)",
          "legendFormat": "CPU %",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percent",
          "min": 0,
          "max": 100,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {"color": "green", "value": null},
              {"color": "yellow", "value": 70},
              {"color": "red", "value": 90}
            ]
          }
        }
      }
    },
    {
      "id": 2,
      "title": "Memory Usage",
      "type": "timeseries",
      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 0},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "(1 - (node_memory_MemAvailable_bytes{instance=~\"$instance\"} / node_memory_MemTotal_bytes{instance=~\"$instance\"})) * 100",
          "legendFormat": "Memory %",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percent",
          "min": 0,
          "max": 100,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {"color": "green", "value": null},
              {"color": "yellow", "value": 70},
              {"color": "red", "value": 90}
            ]
          }
        }
      }
    },
    {
      "id": 3,
      "title": "Disk Usage",
      "type": "gauge",
      "gridPos": {"h": 8, "w": 8, "x": 0, "y": 8},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "100 - ((node_filesystem_avail_bytes{instance=~\"$instance\",mountpoint=\"/\",fstype!=\"rootfs\"} / node_filesystem_size_bytes{instance=~\"$instance\",mountpoint=\"/\",fstype!=\"rootfs\"}) * 100)",
          "legendFormat": "Root /",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "percent",
          "min": 0,
          "max": 100,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {"color": "green", "value": null},
              {"color": "yellow", "value": 70},
              {"color": "red", "value": 85}
            ]
          }
        }
      }
    },
    {
      "id": 4,
      "title": "System Load",
      "type": "timeseries",
      "gridPos": {"h": 8, "w": 8, "x": 8, "y": 8},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "node_load1{instance=~\"$instance\"}",
          "legendFormat": "1m",
          "refId": "A"
        },
        {
          "expr": "node_load5{instance=~\"$instance\"}",
          "legendFormat": "5m",
          "refId": "B"
        },
        {
          "expr": "node_load15{instance=~\"$instance\"}",
          "legendFormat": "15m",
          "refId": "C"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "short"
        }
      }
    },
    {
      "id": 5,
      "title": "Uptime",
      "type": "stat",
      "gridPos": {"h": 8, "w": 8, "x": 16, "y": 8},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "time() - node_boot_time_seconds{instance=~\"$instance\"}",
          "legendFormat": "Uptime",
          "refId": "A"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "s"
        }
      }
    },
    {
      "id": 6,
      "title": "Network Traffic",
      "type": "timeseries",
      "gridPos": {"h": 8, "w": 12, "x": 0, "y": 16},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "rate(node_network_receive_bytes_total{instance=~\"$instance\",device!~\"lo|veth.*|br.*|docker.*\"}[5m])",
          "legendFormat": "Receive {{device}}",
          "refId": "A"
        },
        {
          "expr": "-rate(node_network_transmit_bytes_total{instance=~\"$instance\",device!~\"lo|veth.*|br.*|docker.*\"}[5m])",
          "legendFormat": "Transmit {{device}}",
          "refId": "B"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "Bps"
        }
      }
    },
    {
      "id": 7,
      "title": "Disk I/O",
      "type": "timeseries",
      "gridPos": {"h": 8, "w": 12, "x": 12, "y": 16},
      "datasource": {"type": "prometheus", "uid": "prometheus"},
      "targets": [
        {
          "expr": "rate(node_disk_read_bytes_total{instance=~\"$instance\",device!~\"dm-.*\"}[5m])",
          "legendFormat": "Read {{device}}",
          "refId": "A"
        },
        {
          "expr": "-rate(node_disk_written_bytes_total{instance=~\"$instance\",device!~\"dm-.*\"}[5m])",
          "legendFormat": "Write {{device}}",
          "refId": "B"
        }
      ],
      "fieldConfig": {
        "defaults": {
          "unit": "Bps"
        }
      }
    }
  ]
}