Grafana dashboard: njmon Dashboard For Linux
Description: Dashboard for Linux for a single server (njmon + telegraf + prometheus)  

# njmon Simple Dashboard for Linux System

Dashboard for Linux for a single server (down-drop).   
- Tested with CentOS Linux 7 (`njmon` + `telegraf` + `prometheus`)      
- Tested with Rocky Linux 8 (`njmon` + `telegraf` + `prometheus`)   
- Tested with Ubuntu 20.04 LTS (`njmon` + `telegraf` + `prometheus`)     

## External resources
- Github : [https://github.com/chhanz/njmon-grafana-dashboard-json](https://github.com/chhanz/njmon-grafana-dashboard-json)   
- Document [KR] : [https://chhanz.github.io/linux/2022/02/18/njmon-telegraf-grafana/](https://chhanz.github.io/linux/2022/02/18/njmon-telegraf-grafana/)   
- Reference : [http://nmon.sourceforge.net/pmwiki.php?n=Site.Njmon](http://nmon.sourceforge.net/pmwiki.php?n=Site.Njmon)   


{
  "__inputs": [
    {
      "name": "DS_NJMON",
      "label": "NJMON",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "8.2.0"
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "target": {
          "limit": 100,
          "matchAny": false,
          "tags": [],
          "type": "dashboard"
        },
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": 5,
  "iteration": 1645106164445,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": "${DS_NJMON}",
      "type": "text",
      "description": "",
      "gridPos": {
        "h": 4,
        "w": 3,
        "x": 0,
        "y": 0
      },
      "id": 6,
      "links": [],
      "options": {
        "content": "<center><img src=\"http://nmon.sourceforge.net/docs/njmon-logo-foraixlinux200.png\"></img></center>\n\n\n\n",
        "mode": "html"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "refId": "A"
        }
      ],
      "title": "Data collected by . . . . . . . . . . . . .",
      "transparent": true
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 3,
        "y": 0
      },
      "id": 15,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "100 - cpu_total_idle{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "CPU Busy"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 5,
        "y": 0
      },
      "id": 12,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "system_load1{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Sys Load (1m)"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 7,
        "y": 0
      },
      "id": 13,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "system_load5{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Sys Load (5m)"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 9,
        "y": 0
      },
      "id": 14,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "system_load15{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Sys Load (15m)"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 11,
        "y": 0
      },
      "id": 16,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "mem_used_percent{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "RAM Used"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 13,
        "y": 0
      },
      "id": 17,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "swap_used_percent{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "SWAP Used"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "gauge",
      "description": "Root Filesystem",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "#EAB839",
                "value": 80
              },
              {
                "color": "red",
                "value": 90
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 15,
        "y": 0
      },
      "id": 18,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "disk_used_percent{host=\"$hostname\",job=\"$job\",path=\"/\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Root FS Used"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "stat",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "none"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 2,
        "w": 2,
        "x": 17,
        "y": 0
      },
      "id": 9,
      "options": {
        "colorMode": "none",
        "graphMode": "none",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "count(cpuinfo_cpu_cores{host=\"$hostname\",job=\"$job\"})",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "CPU Cores"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "stat",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "kbytes"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 2,
        "w": 2,
        "x": 19,
        "y": 0
      },
      "id": 10,
      "options": {
        "colorMode": "none",
        "graphMode": "none",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "proc_meminfo_MemTotal{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "RAM Total"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "stat",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [
            {
              "options": {
                "0": {
                  "index": 0,
                  "text": "Optimum "
                }
              },
              "type": "value"
            }
          ],
          "min": 0,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 1
              }
            ]
          },
          "unit": "none"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 4,
        "w": 2,
        "x": 21,
        "y": 0
      },
      "id": 31,
      "options": {
        "colorMode": "background",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "vertical",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "text": {},
        "textMode": "value"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "processes_zombies{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Zombie proc"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "stat",
      "description": "Root Filesystem",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "bits"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 2,
        "w": 2,
        "x": 17,
        "y": 2
      },
      "id": 11,
      "options": {
        "colorMode": "none",
        "graphMode": "none",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "disk_total{host=\"$hostname\",job=\"$job\",path=\"/\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Root FS Total"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "stat",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "decimals": 1,
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "s"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 2,
        "w": 2,
        "x": 19,
        "y": 2
      },
      "id": 8,
      "options": {
        "colorMode": "none",
        "graphMode": "none",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "8.3.3",
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "system_uptime{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "Uptime"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "timeseries",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 0,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineStyle": {
              "fill": "solid"
            },
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "never",
            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "decimals": 1,
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 80
              }
            ]
          },
          "unit": "percent"
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 8,
        "x": 0,
        "y": 4
      },
      "id": 4,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom"
        },
        "tooltip": {
          "mode": "single"
        }
      },
      "targets": [
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "cpu_total_user{host=\"$hostname\",job=\"$job\"}",
          "interval": "",
          "legendFormat": "CPU User",
          "refId": "A"
        },
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "cpu_total_iowait{host=\"$hostname\",job=\"$job\"}",
          "hide": false,
          "interval": "",
          "legendFormat": "CPU IOwait",
          "refId": "B"
        },
        {
          "datasource": "${DS_NJMON}",
          "type": "prometheus",
          "exemplar": true,
          "expr": "cpu_total_sys{host=\"$hostname\",job=\"$job\"}",
          "hide": false,
          "interval": "",
          "legendFormat": "CPU System",
          "refId": "C"
        }
      ],
      "title": "CPU Utilisation for Total System"
    },
    {
      "datasource": "${DS_NJMON}",
      "type": "timeseries",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 10,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "never",
            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "links": [],
          "mappings": [],
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