Grafana dashboard: Nomad Clients
Description: Monitor resource usage of Nomad clients.

https://github.com/mr-karan/nomad-monitoring

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        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisCenteredZero": false,
            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 100,
            "gradientMode": "opacity",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineStyle": {
              "fill": "solid"
            },
            "lineWidth": 2,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "auto",
            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "percentunit"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 24,
        "x": 0,
        "y": 26
      },
      "id": 17,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "tooltip": {
          "mode": "single",
          "sort": "none"
        }
      },
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum by (namespace)(nomad_client_allocs_memory_usage{cluster=\"$cluster\"}) / sum by (namespace)(nomad_client_allocs_memory_allocated{cluster=\"$cluster\"})",
          "legendFormat": "__auto",
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Memory Usage",
      "type": "timeseries"
    }
  ],
  "schemaVersion": 37,
  "style": "dark",
  "tags": [
    "nomad",
    "nomad-clients"
  ],
  "templating": {
    "list": [
      {
        "current": {
          "selected": false,
          "text": "Prometheus",
          "value": "Prometheus"
        },
        "hide": 0,
        "includeAll": false,
        "label": "datasource",
        "multi": false,
        "name": "DS_PROMETHEUS",
        "options": [],
        "query": "prometheus",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "current": {},
        "datasource": {
          "type": "prometheus",
          "uid": "${DS_PROMETHEUS}"
        },
        "definition": "label_values(nomad_client_uptime, cluster)",
        "hide": 0,
        "includeAll": false,
        "label": "Cluster",
        "multi": false,
        "name": "cluster",
        "options": [],
        "query": {
          "query": "label_values(nomad_client_uptime, cluster)",
          "refId": "StandardVariableQuery"
        },
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      }
    ]
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "Nomad Clients",
  "uid": "Y72kP0G4z",
  "version": 1,
  "weekStart": "",
  "gnetId": 16923,
  "description": "Monitor resource usage of Nomad clients."
}