Grafana dashboard: DRBD
Description: This example dashboard showcases what can be accomplished using the metrics that the drbd-reactor Prometheus plugin exports.

# DRBD Grafana Dashboard

With its Prometheus plugin, drbd-reactor exports a powerful set of Prometheus metrics which can be used to optimally monitor a DRBD deployment.

You can find the source [in the drbd-reactor project on GitHub](https://github.com/LINBIT/drbd-reactor/blob/master/src/plugin/prometheus.md)

{
  "__inputs": [
    {
      "name": "DS_PROMETHEUS",
      "label": "Prometheus",
      "description": "",
      "type": "datasource",
      "pluginId": "prometheus",
      "pluginName": "Prometheus"
    }
  ],
  "__requires": [
    {
      "type": "panel",
      "id": "alertlist",
      "name": "Alert list",
      "version": ""
    },
    {
      "type": "panel",
      "id": "gauge",
      "name": "Gauge",
      "version": ""
    },
    {
      "type": "grafana",
      "id": "grafana",
      "name": "Grafana",
      "version": "7.5.2"
    },
    {
      "type": "panel",
      "id": "graph",
      "name": "Graph",
      "version": ""
    },
    {
      "type": "datasource",
      "id": "prometheus",
      "name": "Prometheus",
      "version": "1.0.0"
    },
    {
      "type": "panel",
      "id": "table",
      "name": "Table",
      "version": ""
    }
  ],
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "gnetId": 14339,
  "graphTooltip": 0,
  "id": null,
  "iteration": 1619790416969,
  "links": [],
  "panels": [
    {
      "collapsed": false,
      "datasource": "${DS_PROMETHEUS}",
      "gridPos": {
        "h": 1,
        "w": 24,
        "x": 0,
        "y": 0
      },
      "id": 8,
      "panels": [],
      "title": "DRBD",
      "type": "row"
    },
    {
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
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            "steps": [
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        "overrides": []
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      "gridPos": {
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        "w": 18,
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      "id": 6,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
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          "fields": "",
          "values": false
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        "showThresholdLabels": false,
        "showThresholdMarkers": true,
        "text": {}
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        {
          "exemplar": true,
          "expr": "drbd_resource_resources{instance=~\"$instance\"}",
          "interval": "",
          "legendFormat": "{{instance}}",
          "refId": "A"
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      ],
      "title": "Number of DRBD Resources",
      "type": "gauge"
    },
    {
      "dashboardFilter": "",
      "dashboardTags": [],
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
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      "folderId": null,
      "gridPos": {
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      "id": 18,
      "limit": 10,
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      "pluginVersion": "7.5.2",
      "show": "current",
      "sortOrder": 1,
      "stateFilter": [],
      "timeFrom": null,
      "timeShift": null,
      "title": "Alerts",
      "type": "alertlist"
    },
    {
      "alert": {
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        "conditions": [
          {
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              "type": "and"
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            "query": {
              "params": [
                "B",
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            "reducer": {
              "params": [],
              "type": "avg"
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            "type": "query"
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        ],
        "executionErrorState": "alerting",
        "for": "5m",
        "frequency": "1m",
        "handler": 1,
        "message": "Scraping from ${instance} is slow (took >100ms).",
        "name": "Slow Scrape",
        "noDataState": "no_data",
        "notifications": [
          {
            "uid": "Aoev7clMk"
          }
        ]
      },
      "aliasColors": {},
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      "timeRegions": [],
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        "sort": 0,
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      },
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        "mode": "time",
        "name": null,
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        "alignLevel": null
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    },
    {
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      "fieldConfig": {
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          "custom": {
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          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          },
          "unit": "bytes"
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "DRBD Resource"
            },
            "properties": [
              {
                "id": "custom.width",
                "value": 279
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "Host"
            },
            "properties": [
              {
                "id": "custom.width",
                "value": 238
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "Out of Sync"
            },
            "properties": [
              {
                "id": "custom.width",
                "value": 93
              }
            ]
          }
        ]
      },
      "gridPos": {
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      "id": 16,
      "options": {
        "frameIndex": 0,
        "showHeader": true,
        "sortBy": []
      },
      "pluginVersion": "7.5.2",
      "targets": [
        {
          "exemplar": false,
          "expr": "sum(drbd_peerdevice_outofsync_bytes{instance=~\"$instance\"}) by(name, instance) > 0",
          "format": "table",
          "hide": false,
          "instant": true,
          "interval": "",
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "DRBD Resources Out of Sync",
      "transformations": [
        {
          "id": "organize",
          "options": {
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              "Time": true
            },
            "indexByName": {
              "Time": 0,
              "Value": 3,
              "instance": 2,
              "name": 1
            },
            "renameByName": {
              "Time": "",
              "Value": "Out of Sync",
              "instance": "Host",
              "name": "DRBD Resource"
            }
          }
        },
        {
          "id": "sortBy",
          "options": {
            "fields": {},
            "sort": [
              {
                "desc": true,
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              }
            ]
          }
        }
      ],
      "type": "table"
    },
    {
      "alert": {
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            "query": {
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            "reducer": {
              "params": [],
              "type": "last"
            },
            "type": "query"
          }
        ],
        "executionErrorState": "alerting",
        "for": "5m",
        "frequency": "1m",
        "handler": 1,
        "message": "Data is out of sync!!!",
        "name": "DRBD out-of-sync",
        "noDataState": "no_data",
        "notifications": [
          {
            "uid": "Aoev7clMk"
          }
        ]
      },
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "description": "DRBD data out of sync with a peer",
      "fieldConfig": {
        "defaults": {
          "unit": "bytes"
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 6,
        "x": 18,
        "y": 9
      },
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      "id": 12,
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        "min": false,
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        "values": false
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      "nullPointMode": "null",
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      },
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      "points": false,
      "renderer": "flot",
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      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "exemplar": true,
          "expr": "drbd_peerdevice_outofsync_bytes{instance=~\"$instance\"} > 0",
          "interval": "",
          "legendFormat": "{{name}} on {{instance}}",
          "refId": "A"
        },
        {
          "exemplar": true,
          "expr": "drbd_peerdevice_outofsync_bytes > 0",
          "hide": true,
          "interval": "",
          "legendFormat": "",
          "refId": "B"
        }
      ],
      "thresholds": [
        {
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          "fill": true,
          "line": true,
          "op": "gt",
          "value": 0,
          "visible": true
        }
      ],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "DRBD out-of-sync",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
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        "mode": "time",
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        "show": true,
        "values": []
      },
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          "max": null,
          "min": null,
          "show": true
        },
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          "max": null,
          "min": null,
          "show": true
        }
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      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {},
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 6,
        "x": 0,
        "y": 17
      },
      "hiddenSeries": false,
      "id": 14,
      "legend": {
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        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
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      "linewidth": 1,
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      "options": {
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      "pluginVersion": "7.5.2",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
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      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "exemplar": true,
          "expr": "drbd_connection_state{drbd_connection_state=~\"!UpToDate\", instance=~\"$instance\"} == 1",
          "interval": "",
          "legendFormat": "{{name}} {{instance}}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Standalone DRBD resources",
      "tooltip": {
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        "value_type": "individual"
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      }
    },
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      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
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      },
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        "x": 6,
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      },
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      "steppedLine": false,
      "targets": [
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          "exemplar": true,
          "expr": "drbd_device_unintentionaldiskless == 1",
          "interval": "",
          "legendFormat": "{{instance}}",
          "refId": "A"
        }
      ],
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      "timeRegions": [],
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          "show": true
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      }
    },
    {
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
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            "mode": "thresholds"
          },
          "custom": {
            "align": null,
            "displayMode": "auto",
            "filterable": false
          },
          "mappings": [
            {
              "from": "",
              "id": 1,
              "text": "No",
              "to": "",
              "type": 1,
              "value": "1"
            }
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          "thresholds": {
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            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
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            ]
          }
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      "targets": [
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          "expr": "count(drbd_device_quorum{instance=~\"$instance\"} == 0) by(instance, name)",
          "format": "table",
          "instant": true,
          "interval": "",
          "intervalFactor": 1,
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "DRBD Resources Without Quorum",
      "transformations": [
        {
          "id": "merge",
          "options": {}
        },
        {
          "id": "organize",
          "options": {
            "excludeByName": {
              "Time": true
            },
            "indexByName": {},
            "renameByName": {
              "Value #A": "Quorum?",
              "instance": "Instance",
              "name": "DRBD Resource"
            }
          }
        }
      ],
      "type": "table"
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            "type": "query"
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        ],
        "executionErrorState": "alerting",
        "for": "5m",
        "frequency": "1m",
        "handler": 1,
        "message": "Resource ${name} does not have quorum",
        "name": "Resources Without Quorum",
        "noDataState": "ok",
        "notifications": [
          {
            "uid": "Aoev7clMk"
          }
        ]
      },
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
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      },
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          "refId": "B"
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          "visible": true
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      ],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Number of Resources Without Quorum",
      "tooltip": {
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        "value_type": "individual"
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              "type": "gt"
            },
            "operator": {
              "type": "and"
            },
            "query": {
              "params": [
                "B",
                "10m",
                "now"
              ]
            },
            "reducer": {
              "params": [],
              "type": "avg"
            },
            "type": "query"
          }
        ],
        "executionErrorState": "alerting",
        "for": "10m",
        "frequency": "1m",
        "handler": 1,
        "message": "Excessive write rate on volume ${name} on ${instance}.\n\nDRBD write rate has exceeded 10MiB/s for more than 10 minutes.",
        "name": "Excessive Write Rate",
        "noDataState": "no_data",
        "notifications": [
          {
            "uid": "Aoev7clMk"
          }
        ]
      },
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "unit": "binBps"
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 0,
        "y": 25
      },
      "hiddenSeries": false,
      "id": 24,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "percentage": false,
      "pluginVersion": "7.5.2",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "exemplar": true,
          "expr": "rate(drbd_device_written_bytes_total{instance=~\"$instance\"}[5m]) and topk(5, avg_over_time(drbd_device_written_bytes_total{instance=~\"$instance\"}[6h]) > 0)",
          "instant": false,
          "interval": "",
          "legendFormat": "{{name}} on {{instance}}",
          "refId": "A"
        },
        {
          "exemplar": true,
          "expr": "rate(drbd_device_written_bytes_total[5m]) and topk(5, avg_over_time(drbd_device_written_bytes_total[6h]) > 0)",
          "hide": true,
          "interval": "",
          "legendFormat": "",
          "refId": "B"
        }
      ],
      "thresholds": [
        {
          "colorMode": "critical",
          "fill": true,
          "line": true,
          "op": "gt",
          "value": 10485760,
          "visible": true
        }
      ],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Write Rate (5 Most Active Volumes)",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "binBps",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "alert": {
        "alertRuleTags": {},
        "conditions": [
          {
            "evaluator": {
              "params": [
                10485760
              ],
              "type": "gt"
            },
            "operator": {
              "type": "and"
            },
            "query": {
              "params": [
                "B",
                "10m",
                "now"
              ]
            },
            "reducer": {
              "params": [],
              "type": "avg"
            },
            "type": "query"
          }
        ],
        "executionErrorState": "alerting",
        "for": "10m",
        "frequency": "1m",
        "handler": 1,
        "message": "Excessive Read Rate on volume ${name} on ${instance}.\n\nDRBD read rate has exceeded 10MiB/s for more than 10 minutes.",
        "name": "Excessive Read Rate",
        "noDataState": "no_data",
        "notifications": [
          {
            "uid": "Aoev7clMk"
          }
        ]
      },
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fieldConfig": {
        "defaults": {
          "unit": "binBps"
        },
        "overrides": []
      },
      "fill": 1,
      "fillGradient": 0,
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 12,
        "y": 25
      },
      "hiddenSeries": false,
      "id": 25,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options": {
        "alertThreshold": true
      },
      "percentage": false,
      "pluginVersion": "7.5.2",
      "pointradius": 2,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": false,
      "steppedLine": false,
      "targets": [
        {
          "exemplar": true,
          "expr": "rate(drbd_device_read_bytes_total{instance=~\"$instance\"}[5m]) and topk(5, avg_over_time(drbd_device_read_bytes_total{instance=~\"$instance\"}[6h]) > 0)",
          "instant": false,
          "interval": "",
          "legendFormat": "{{name}} on {{instance}}",
          "refId": "A"
        },
        {
          "exemplar": true,
          "expr": "rate(drbd_device_read_bytes_total[5m]) and topk(5, avg_over_time(drbd_device_read_bytes_total[6h]) > 0)",
          "hide": true,
          "interval": "",
          "legendFormat": "",
          "refId": "B"
        }
      ],
      "thresholds": [
        {
          "colorMode": "critical",
          "fill": true,
          "line": true,
          "op": "gt",
          "value": 10485760,
          "visible": true
        }
      ],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Read Rate (5 Most Active Volumes)",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "binBps",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "refresh": "30s",
  "schemaVersion": 27,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "label_values(drbdreactor_up, instance)",
        "description": null,
        "error": null,
        "hide": 0,
        "includeAll": true,
        "label": null,
        "multi": true,
        "name": "instance",
        "options": [],
        "query": {
          "query": "label_values(drbdreactor_up, instance)",
          "refId": "StandardVariableQuery"
        },
        "refresh": 2,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "",
  "title": "DRBD",
  "uid": "f_tZtVlMz",
  "version": 44,
  "description": "This example dashboard showcases what can be accomplished using the metrics that the drbd-reactor Prometheus plugin exports."
}