Grafana dashboard: Node exporter: mdadm status
Description: Prometheus node_exporter mdadm module dashboard. Per Server and per md view

This dashboard show only mdadm status, scraped from node exporter. 
Dashboard adopted for node exporter v1.0.0 https://github.com/prometheus/node_exporter/releases/tag/v1.0.0
Because 

```Refactoring of the mdadm collector changes several metrics
node_md_disks_active is removed
node_md_disks now has a state label for "failed", "spare", "active" disks.
node_md_is_active is replaced by node_md_state with a state set of "active", "inactive", "recovering", "resync".```

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          "expr": "(node_md_blocks_synced{instance=~\"$instance\",device=\"$md\"} / node_md_blocks{instance=~\"$instance\",device=\"$md\"}) * 100",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "{{device }}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "Sync ratio $host $md",
      "tooltip": {
        "shared": true,
        "sort": 0,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "$$hashKey": "object:285",
          "format": "percent",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        },
        {
          "$$hashKey": "object:286",
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "refresh": "1m",
  "schemaVersion": 25,
  "style": "dark",
  "tags": [
    "node",
    "disk",
    "mdstat"
  ],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_VMC_PRODUCTION}",
        "definition": "",
        "hide": 0,
        "includeAll": false,
        "label": null,
        "multi": false,
        "name": "instance",
        "options": [],
        "query": "label_values(node_md_disks, instance)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 1,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_VMC_PRODUCTION}",
        "definition": "",
        "hide": 2,
        "includeAll": false,
        "label": null,
        "multi": false,
        "name": "host",
        "options": [],
        "query": "label_values(node_md_disks{instance=~\"$instance\"}, instance)",
        "refresh": 1,
        "regex": "/(.+):.*/",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_VMC_PRODUCTION}",
        "definition": "label_values(node_md_disks{instance=~\"$instance\"}, device)",
        "hide": 0,
        "includeAll": false,
        "label": null,
        "multi": true,
        "name": "md",
        "options": [],
        "query": "label_values(node_md_disks{instance=~\"$instance\"}, device)",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-24h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ],
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
      "7d",
      "30d"
    ]
  },
  "timezone": "browser",
  "title": "Node exporter: mdadm status",
  "uid": "VB2dzj4Mk",
  "version": 13
}