Grafana dashboard: Cassandra
Description: Monitoring Cassandra with Prometheus using JXM exporter

Cassandra dashboard for Prometheus JXM exporter

https://github.com/prometheus/jmx_exporter
JXM exporter configuration:
```
lowercaseOutputName: true
lowercaseOutputLabelNames: true
whitelistObjectNames: [
"org.apache.cassandra.metrics:type=ColumnFamily,name=RangeLatency,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=LiveSSTableCount,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=SSTablesPerReadHistogram,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=SpeculativeRetries,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=MemtableOnHeapSize,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=MemtableSwitchCount,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=MemtableLiveDataSize,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=MemtableColumnsCount,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=MemtableOffHeapSize,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=BloomFilterFalsePositives,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=BloomFilterFalseRatio,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=BloomFilterDiskSpaceUsed,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=BloomFilterOffHeapMemoryUsed,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=SnapshotsSize,*",
"org.apache.cassandra.metrics:type=ColumnFamily,name=TotalDiskSpaceUsed,*",
"org.apache.cassandra.metrics:type=CQL,name=RegularStatementsExecuted,*",
"org.apache.cassandra.metrics:type=CQL,name=PreparedStatementsExecuted,*",
"org.apache.cassandra.metrics:type=Compaction,name=PendingTasks,*",
"org.apache.cassandra.metrics:type=Compaction,name=CompletedTasks,*",
"org.apache.cassandra.metrics:type=Compaction,name=BytesCompacted,*",
"org.apache.cassandra.metrics:type=Compaction,name=TotalCompactionsCompleted,*",
"org.apache.cassandra.metrics:type=ClientRequest,name=Latency,*",
"org.apache.cassandra.metrics:type=ClientRequest,name=Unavailables,*",
"org.apache.cassandra.metrics:type=ClientRequest,name=Timeouts,*",
"org.apache.cassandra.metrics:type=Storage,name=Exceptions,*",
"org.apache.cassandra.metrics:type=Storage,name=TotalHints,*",
"org.apache.cassandra.metrics:type=Storage,name=TotalHintsInProgress,*",
"org.apache.cassandra.metrics:type=Storage,name=Load,*",
"org.apache.cassandra.metrics:type=Connection,name=TotalTimeouts,*",
"org.apache.cassandra.metrics:type=ThreadPools,name=CompletedTasks,*",
"org.apache.cassandra.metrics:type=ThreadPools,name=PendingTasks,*",
"org.apache.cassandra.metrics:type=ThreadPools,name=ActiveTasks,*",
"org.apache.cassandra.metrics:type=ThreadPools,name=TotalBlockedTasks,*",
"org.apache.cassandra.metrics:type=ThreadPools,name=CurrentlyBlockedTasks,*",
"org.apache.cassandra.metrics:type=DroppedMessage,name=Dropped,*",
"org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=HitRate,*",
"org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Hits,*",
"org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Requests,*",
"org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Entries,*",
"org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Size,*",
#"org.apache.cassandra.metrics:type=Streaming,name=TotalIncomingBytes,*",
#"org.apache.cassandra.metrics:type=Streaming,name=TotalOutgoingBytes,*",
"org.apache.cassandra.metrics:type=Client,name=connectedNativeClients,*",
"org.apache.cassandra.metrics:type=Client,name=connectedThriftClients,*",
"org.apache.cassandra.metrics:type=Table,name=WriteLatency,*",
"org.apache.cassandra.metrics:type=Table,name=ReadLatency,*",
"org.apache.cassandra.net:type=FailureDetector,*",
]
#blacklistObjectNames: ["org.apache.cassandra.metrics:type=ColumnFamily,*"]
rules:
  - pattern: org.apache.cassandra.metrics<type=(Connection|Streaming), scope=(\S*), name=(\S*)><>(Count|Value)
    name: cassandra_$1_$3
    labels:
      address: "$2"
  - pattern: org.apache.cassandra.metrics<type=(ColumnFamily), name=(RangeLatency)><>(Mean)
    name: cassandra_$1_$2_$3
  - pattern: org.apache.cassandra.net<type=(FailureDetector)><>(DownEndpointCount)
    name: cassandra_$1_$2
  - pattern: org.apache.cassandra.metrics<type=(Keyspace), keyspace=(\S*), name=(\S*)><>(Count|Mean|95thPercentile)
    name: cassandra_$1_$3_$4
    labels:
      "$1": "$2"
  - pattern: org.apache.cassandra.metrics<type=(Table), keyspace=(\S*), scope=(\S*), name=(\S*)><>(Count|Mean|95thPercentile)
    name: cassandra_$1_$4_$5
    labels:
      "keyspace": "$2"
      "table": "$3"
  - pattern: org.apache.cassandra.metrics<type=(ClientRequest), scope=(\S*), name=(\S*)><>(Count|Mean|95thPercentile)
    name: cassandra_$1_$3_$4
    labels:
      "type": "$2"
  - pattern: org.apache.cassandra.metrics<type=(\S*)(?:, ((?!scope)\S*)=(\S*))?(?:, scope=(\S*))?,
      name=(\S*)><>(Count|Value)
    name: cassandra_$1_$5
    labels:
      "$1": "$4"
      "$2": "$3"
```
JMX exporter configuration can also be found here: https://github.com/oleg-glushak/cassandra-prometheus-jmx

Tested on:
- Prometheus v2.2
- Grafana v5.0
- JMX exporter v0.3.0
- Cassandra v3.11

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      "pluginName": "Prometheus"
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      "id": "singlestat",
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  "annotations": {
    "list": [
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        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable": true,
        "hide": true,
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      "thresholds": "1,1",
      "title": "Node status",
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      "valueFontSize": "80%",
      "valueMaps": [
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      "datasource": "${DS_PROMETHEUS_DATA}",
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        "thresholdMarkers": true
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      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
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      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "cassandra_clientrequest_latency_mean{instance=\"$instance\",type=~\"Write\"} > 0",
          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
      "thresholds": "10000,100000",
      "title": "ClientWrite avg duration",
      "type": "singlestat",
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      "valueMaps": [
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      "colors": [
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      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
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        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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      "prefix": "",
      "prefixFontSize": "50%",
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
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        "thresholdMarkers": true
      },
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        "w": 3,
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        }
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "(jvm_memory_bytes_used{area=\"heap\",instance=\"$instance\"} / jvm_memory_bytes_max{area=\"heap\", instance=\"$instance\"}) * 100",
          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
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      "title": "JVM Heap usage",
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      "colorValue": true,
      "colors": [
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      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
      "format": "none",
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        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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        }
      ],
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      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
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          "to": "null"
        }
      ],
      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "cassandra_compaction_pendingtasks{instance=~\"$instance\"}",
          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
      "thresholds": "5,20",
      "title": "Pending compactions",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
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      ],
      "valueName": "current"
    },
    {
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      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "#299c46",
        "rgba(237, 129, 40, 0.89)",
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      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
      "format": "none",
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        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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        "w": 3,
        "x": 15,
        "y": 0
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      ],
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      "nullPointMode": "connected",
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      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
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          "text": "N/A",
          "to": "null"
        }
      ],
      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "sum(cassandra_threadpools_pendingtasks{instance=~\"$instance\"})",
          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
      "thresholds": "20,100",
      "title": "Pending threads",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
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      "valueName": "current"
    },
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      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "#299c46",
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      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
      "format": "s",
      "gauge": {
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        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 3,
        "x": 18,
        "y": 0
      },
      "id": 102,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
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      ],
      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "rate(jvm_gc_collection_seconds_sum{instance=\"$instance\",gc=\"ParNew\"}[$interval]) / rate(jvm_gc_collection_seconds_count{instance=\"$instance\",gc=\"ParNew\"}[$interval])",
          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
      "thresholds": "250,750",
      "title": "ParNew GC duration",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
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      "valueName": "current"
    },
    {
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      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "#299c46",
        "rgba(237, 129, 40, 0.89)",
        "#d44a3a"
      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
      "format": "s",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
      "gridPos": {
        "h": 3,
        "w": 3,
        "x": 21,
        "y": 0
      },
      "id": 103,
      "interval": null,
      "links": [],
      "mappingType": 1,
      "mappingTypes": [
        {
          "name": "value to text",
          "value": 1
        },
        {
          "name": "range to text",
          "value": 2
        }
      ],
      "maxDataPoints": 100,
      "nullPointMode": "connected",
      "nullText": null,
      "postfix": "",
      "postfixFontSize": "50%",
      "prefix": "",
      "prefixFontSize": "50%",
      "rangeMaps": [
        {
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      ],
      "sparkline": {
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        "full": false,
        "lineColor": "rgb(31, 120, 193)",
        "show": true
      },
      "tableColumn": "",
      "targets": [
        {
          "expr": "rate(jvm_gc_collection_seconds_sum{instance=\"$instance\",gc=\"ConcurrentMarkSweep\"}[$interval]) / rate(jvm_gc_collection_seconds_count{instance=\"$instance\",gc=\"ConcurrentMarkSweep\"}[$interval])",
          "format": "time_series",
          "instant": false,
          "intervalFactor": 1,
          "refId": "A"
        }
      ],
      "thresholds": "250,750",
      "title": "OldGen GC duration",
      "type": "singlestat",
      "valueFontSize": "80%",
      "valueMaps": [
        {
          "op": "=",
          "text": "N/A",
          "value": "null"
        }
      ],
      "valueName": "current"
    },
    {
      "cacheTimeout": null,
      "colorBackground": false,
      "colorValue": true,
      "colors": [
        "#299c46",
        "rgba(237, 129, 40, 0.89)",
        "#d44a3a"
      ],
      "datasource": "${DS_PROMETHEUS_DATA}",
      "format": "none",
      "gauge": {
        "maxValue": 100,
        "minValue": 0,
        "show": false,
        "thresholdLabels": false,
        "thresholdMarkers": true
      },
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